1
|
Wang T, Hu J, Hou Z, Yang H. Antifouling and Antioxidant Properties of PVDF Membrane Modified with Polyethylene Glycol Methacrylate and Propyl Gallate. Materials (Basel) 2024; 17:1867. [PMID: 38673223 PMCID: PMC11052291 DOI: 10.3390/ma17081867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 04/13/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024]
Abstract
In this study, molecules of propyl gallate (PG) and polyethylene glycol methacrylate (PEGMA) were covalently bonded via a transesterification reaction and subsequently grafted onto polyvinylidene fluoride substrates using a homogeneous radiation grafting technique. The enhancement of the membranes' hydrophilicity with the increment of the grafting rate was corroborated by scanning electron microscopy imaging and measurements of the water contact angle. At a grafting degree of 10.1% and after a duration of 4 min, the water contact angle could decrease to as low as 40.1°. Cyclic flux testing demonstrated that the membranes modified in this manner consistently achieved a flux recovery rate exceeding 90% across varying degrees of grafting, indicating robust anti-fouling capabilities. Furthermore, these modified membranes exhibited significant antioxidant ability while maintaining antifouling performance over 30 days. The ability of the modified membranes to scavenge 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS+) free radicals remained nearly unchanged after being stored in pure water for 30 days, and the flux recovery rate remained above 95% after immersion in sodium hypochlorite solution for 30 days. Among the tested membranes, the PVDF-g-PEGMAG modified membrane with a grafting degree of 7.2% showed the best antioxidant effect.
Collapse
Affiliation(s)
- Ting Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (T.W.); (J.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun Hu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (T.W.); (J.H.)
| | - Zhengchi Hou
- Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China;
| | - Haijun Yang
- Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China;
| |
Collapse
|
2
|
Vu DL, Nguyen QT, Chung PS, Ahn KK. Flowing Liquid-Based Triboelectric Nanogenerator Performance Enhancement with Functionalized Polyvinylidene Fluoride Membrane for Self-Powered Pulsating Flow Sensing Application. Polymers (Basel) 2024; 16:536. [PMID: 38399914 PMCID: PMC10891804 DOI: 10.3390/polym16040536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 02/02/2024] [Accepted: 02/13/2024] [Indexed: 02/25/2024] Open
Abstract
Pulsating flow, a common term in industrial and medical contexts, necessitates precise water flow measurement for evaluating hydrodynamic system performance. Addressing challenges in measurement technologies, particularly for pulsating flow, we propose a flowing liquid-based triboelectric nanogenerator (FL-TENG). To generate sufficient energy for a self-powered device, we employed a fluorinated functionalized technique on a polyvinylidene fluoride (PVDF) membrane to enhance the performance of FL-TENG. The results attained a maximum instantaneous power density of 50.6 µW/cm2, and the energy output proved adequate to illuminate 10 white LEDs. Regression analysis depicting the dependence of the output electrical signals on water flow revealed a strong linear relationship between the voltage and flow rate with high sensitivity. A high correlation coefficient R2 within the range from 0.951 to 0.998 indicates precise measurement accuracy for the proposed FL-TENG. Furthermore, the measured time interval between two voltage peaks precisely corresponds to the period of pulsating flow, demonstrating that the output voltage can effectively sense pulsating flow based on voltage and the time interval between two voltage peaks. This work highlights the utility of FL-TENG as a self-powered pulsating flow rate sensor.
Collapse
Affiliation(s)
- Duy Linh Vu
- Department of Nanoscience and Engineering, Inje University, 197 Inje-ro, Gimhae-si, Gyeongsangnamdo 50834, Republic of Korea;
| | - Quang Tan Nguyen
- School of Mechanical Engineering, University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan 44610, Republic of Korea;
| | - Pil Seung Chung
- Department of Nanoscience and Engineering, Inje University, 197 Inje-ro, Gimhae-si, Gyeongsangnamdo 50834, Republic of Korea;
- Department of Energy Engineering, Inje University, 197 Inje-ro, Gimhae-si, Gyeongsangnamdo 50834, Republic of Korea
| | - Kyoung Kwan Ahn
- School of Mechanical Engineering, University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan 44610, Republic of Korea;
| |
Collapse
|
3
|
Wang T, Hou Z, Yang H, Hu J. A PEGylated PVDF Antifouling Membrane Prepared by Grafting of Methoxypolyethylene Glycol Acrylate in Gama-Irradiated Homogeneous Solution. Materials (Basel) 2024; 17:873. [PMID: 38399124 PMCID: PMC10890161 DOI: 10.3390/ma17040873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/07/2024] [Accepted: 02/10/2024] [Indexed: 02/25/2024]
Abstract
In this study, methoxypolyethylene glycol acrylate (mPEGA) served as a PEGylated monomer and was grafted onto polyvinylidene fluoride (PVDF) through homogeneous solution gamma irradiation. The grafting process was confirmed using several techniques, including infrared spectroscopy (FTIR), thermodynamic stability assessments, and rotational viscosity measurements. The degree of grafting (DG) was determined via the gravimetric method. By varying the monomer concentration, a range of DGs was achieved in the PVDF-g-mPEGA copolymers. Investigations into water contact angles and scanning electron microscopy (SEM) images indicated a direct correlation between increased hydrophilicity, membrane porosity, and higher DG levels in the PVDF-g-mPEGA membrane. Filtration tests demonstrated that enhanced DGs resulted in more permeable PVDF-g-mPEGA membranes, eliminating the need for pore-forming agents. Antifouling tests revealed that membranes with a lower DG maintained a high flux recovery rate, indicating that the innate properties of PVDF could be largely preserved.
Collapse
Affiliation(s)
- Ting Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (T.W.); (J.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhengchi Hou
- Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China;
| | - Haijun Yang
- Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China;
| | - Jun Hu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (T.W.); (J.H.)
- Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China;
| |
Collapse
|
4
|
Tu Y, Yang Y, Zheng Y, Guo S, Shen J. Polyvinylidene Fluoride Based Piezoelectric Composites with Strong Interfacial Adhesion via Click Chemistry for Self-Powered Flexible Sensors. Small 2024:e2309758. [PMID: 38326102 DOI: 10.1002/smll.202309758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 01/20/2024] [Indexed: 02/09/2024]
Abstract
Achieving relatively uniform dispersion in organic-inorganic composites with overwhelming differences in surface energy is a perennial challenge. Herein, novel eliminated polyvinylidene fluoride (EPVDF)/EPVDF functionalized barium titanate nanoparticles (EPVDF@BT) flexible piezoelectric nanogenerators (PENGs) with strong interfacial adhesion are developed via thermal stretching following sequential click chemistry. Thanks to the strong interfacial adhesion, the optimal PENGs containing ultra-high β-phase content (97.2%) exhibit not only optimized mechanical and dielectric behaviors but also excellent piezoelectric properties with high piezoelectric output (V = 10.7 V, I = 216 nA), reliable durability (8000 cycles), ultrafast response time (20 ms), and good sensitivity (2.09 nA kPa-1 ), far outperforming most reported PVDF-based composites. Furthermore, COMSOL finite element simulations (FEM) confirm that the elevated stress transfer efficiency induced by the strong interfacial adhesion is the main driving force for enhanced piezoelectric performances. For practical applications, self-powered PENGs can simply but stably capture mechanical energy, drive tiny electronic devices, and serve as potential multifunctional and durable sensors for detecting human physiological motions. This work opens a pioneering avenue to break the trade-offs between piezoelectric and other properties, which is of great importance for developing self-powered flexible sensors.
Collapse
Affiliation(s)
- Youlei Tu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing Technology, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), Chengdu, 610065, China
| | - Yuliang Yang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing Technology, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), Chengdu, 610065, China
| | - Yu Zheng
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing Technology, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), Chengdu, 610065, China
| | - Shaoyun Guo
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing Technology, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), Chengdu, 610065, China
| | - Jiabin Shen
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing Technology, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), Chengdu, 610065, China
| |
Collapse
|
5
|
Tuncay G, Türken T, Koyuncu İ. Investigation of different molecular weight Polyvinylidene Fluoride (PVDF) polymer for the fabrication and performance of braid hollow fiber membranes. Environ Technol 2024; 45:404-417. [PMID: 35946589 DOI: 10.1080/09593330.2022.2112092] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 08/01/2022] [Indexed: 06/15/2023]
Abstract
In the current study, braid reinforced membranes were fabricated from polyvinylidene fluoride (PVDF) polymers with two different molecular weights, and the blending of the polymers in a 1:1 ratio to upgrade the performance of the membrane. Characterization, filtration studies, and membrane bioreactor (MBR) application were done to evaluate membrane performance by applying the same operation conditions on each membrane. Characterization studies indicated that the fabricated membrane from blending polymers was a hydrophilic structure with a contact angle of 50.78° and smoother surface properties compared to the other fabricated membranes. According to the MBR results, at the end of the operation process, TMP levels of the membrane from the blending method are found 150 mbar, membrane from high molecular weight PVDF polymer had 250 mbar, and membrane from low molecular weight PVDF polymer had 800 mbar. As a consequence of the investigation, it is seen that the hydrophilic structure of the membrane allows the pollutant to adsorb less to the blend membrane surface, and the lower roughness is also a factor in reducing fouling.
Collapse
Affiliation(s)
- Gizem Tuncay
- National Research Center on Membrane Technologies, Istanbul Technical University, Istanbul, Turkey
- Department of Environmental Engineering, Istanbul Technical University Istanbul, Turkey
| | - Türker Türken
- National Research Center on Membrane Technologies, Istanbul Technical University, Istanbul, Turkey
- Department of Environmental Engineering, Istanbul Technical University Istanbul, Turkey
| | - İsmail Koyuncu
- National Research Center on Membrane Technologies, Istanbul Technical University, Istanbul, Turkey
- Department of Environmental Engineering, Istanbul Technical University Istanbul, Turkey
| |
Collapse
|
6
|
Wang W, Ma L, Xu B, Zhu H, Zhang C, Chen L, Wei W. Hydrogen Bond Boosted Ferroelectric Polarization Enables High Rate Capability Lithium Metal Batteries. Small 2024; 20:e2305797. [PMID: 37658501 DOI: 10.1002/smll.202305797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/20/2023] [Indexed: 09/03/2023]
Abstract
Lithium metal is considered as a promising anode material for next generation lithium-based batteries due to its highest specific capacity and lowest reduction potential. However, irreversible lithium stripping/depositing gives rise to severe dendritic growth and countless dead lithium, which lead to rapid electrochemical performance degradation and increased safety hazards, and thus limit its large-scale application. Herein, this work demonstrates a universal hydrogen-bond-induced strategy to in situ form a highly polarized ferroelectric polyvinylidene fluoride (PVDF) coating on the anode current collector. The localized electric field induced by the polarized ferroelectric PVDF can accelerate the migration of lithium ions and alleviate the shortage of lithium ions and uneven ion/electron distribution and transfer at the anode/electrolyte interface, thus promoting uniform deposition and stripping of Li+ at high-rate situations. As a result, the symmetrical Li || Li batteries with polarized PVDF coating exhibit a long cycling lifespan over 900 h under 2 mA cm-2 with marginal voltage polarization, and an ultra-high-rate performance up to 8.85 mA cm-2 . The full cells using LiFePO4 cathode also display enhanced electrochemical performance. The innovative strategy of ferroelectric polarization sheds light on interface engineering to circumvent Li dendrite growth in lithium metal batteries (LMBs).
Collapse
Affiliation(s)
- Wenran Wang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, P. R. China
| | - Li Ma
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, P. R. China
| | - Baolei Xu
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, P. R. China
| | - Hai Zhu
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, P. R. China
- Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha, Hunan, 410022, P. R. China
| | - Chunxiao Zhang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, P. R. China
| | - Libao Chen
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, P. R. China
| | - Weifeng Wei
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, P. R. China
| |
Collapse
|
7
|
Wang T, Wang Y, Dang F, Liu M, Sun S, Jin K, Cheng P. Optimizing solvent dipole moment enables PVDF to improve piezoelectric performance. Nanotechnology 2023; 35:075501. [PMID: 37918030 DOI: 10.1088/1361-6528/ad0907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 11/02/2023] [Indexed: 11/04/2023]
Abstract
The all-trans conformation (β-phase) possesses a significant impact on the piezoelectric polymer polyvinylidene fluoride (PVDF). Inducing more molecular chain [-CH2-CF2-]nto form all-trans conformation is one of the biggest obstacles for manufacturing high-performance piezoelectric sensing devices. Herein, the continuous vacuum technology is used to modulate the polarity of binary solvents by the proportion of the lower solvent. The regulated solvent forms a high dipole moment, an interaction between the dipole ofβ-phase and the dipole moment makes the phase reversal in PVDF. Fourier transform infrared spectroscopy, piezoelectric constant test and other characterization results show that when the weakly polar acetone and the strongly polar solvent DMF reach a ratio of 4:6, the pure PVDF film possesses high piezoelectricity (d33∼ -44.8 pC N-1) and strong self-polarization. Additionally, the A4D6device exhibits high sensitivity (S1= 0.182 V/N, 0.5 N ∼ 30 N), driven capability (0.49 mW m-2), and reliability during the electrical tests as a pressure device. This work provides an effective and cost-effective route of optimizing the solvent's polarity to improve the piezoelectric characteristics of the polymer.
Collapse
Affiliation(s)
- Tianliang Wang
- School of Aerospace Science and Technology, Xidian University, Xi'an 710126, People's Republic of China
| | - Yinglin Wang
- School of Aerospace Science and Technology, Xidian University, Xi'an 710126, People's Republic of China
| | - Fan Dang
- School of Aerospace Science and Technology, Xidian University, Xi'an 710126, People's Republic of China
| | - Mengge Liu
- School of Aerospace Science and Technology, Xidian University, Xi'an 710126, People's Republic of China
| | - Shanfu Sun
- School of Aerospace Science and Technology, Xidian University, Xi'an 710126, People's Republic of China
| | - Ke Jin
- School of Aerospace Science and Technology, Xidian University, Xi'an 710126, People's Republic of China
| | - Pengfei Cheng
- School of Aerospace Science and Technology, Xidian University, Xi'an 710126, People's Republic of China
| |
Collapse
|
8
|
Basko A, Lebedeva T, Yurov M, Ilyasova A, Elyashevich G, Lavrentyev V, Kalmykov D, Volkov A, Pochivalov K. Mechanism of PVDF Membrane Formation by NIPS Revisited: Effect of Precipitation Bath Nature and Polymer-Solvent Affinity. Polymers (Basel) 2023; 15:4307. [PMID: 37959987 PMCID: PMC10650574 DOI: 10.3390/polym15214307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/31/2023] [Accepted: 11/01/2023] [Indexed: 11/15/2023] Open
Abstract
A new interpretation of the mechanism of the polyvinylidene fluoride (PVDF) membrane formation using the nonsolvent-induced phase separation (NIPS) method based on an analysis of the complete experimental phase diagram for the three-component mixture PVDF-dimethyl acetamide (DMAc)-water is proposed. The effects of the precipitation bath's harshness and thermodynamic affinity of the polymer's solvent on the morphology, crystalline structure, transport and physical-mechanical properties of the membranes are investigated. These characteristics were studied via scanning electron microscopy, wide-angle X-ray scattering, liquid-liquid porosimetry and standard methods of physico-mechanical analysis. It is established that an increase in DMAc concentration in the precipitation bath results in the growth of mean pore size from ~60 to ~150 nm and an increase in permeance from ~2.8 to ~8 L m-2 h-1 bar-1. It was observed that pore size transformations are accompanied by changes in the tensile strength of membranes from ~9 to ~11 and to 6 MPa, which were explained by the degeneration of finger-like pores and appearance of spherulitic structures in the samples. The addition of water to the dope solution decreased both the transport (mean pore size changed from ~55 to ~25 nm and permeance reduced from ~2.8 to ~0.5 L m-2 h-1 bar-1) and mechanical properties of the membranes (tensile strength decreased from ~9 to ~6 MPa). It is possible to conclude that the best membrane quality may be reached using pure DMAc as a solvent and a precipitation bath containing 10-30% wt. of DMAc, in addition to water.
Collapse
Affiliation(s)
- Andrey Basko
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 ul. Akademicheskaya, 153045 Ivanovo, Russia; (A.B.); (T.L.); (M.Y.); (A.I.); (D.K.)
| | - Tatyana Lebedeva
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 ul. Akademicheskaya, 153045 Ivanovo, Russia; (A.B.); (T.L.); (M.Y.); (A.I.); (D.K.)
| | - Mikhail Yurov
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 ul. Akademicheskaya, 153045 Ivanovo, Russia; (A.B.); (T.L.); (M.Y.); (A.I.); (D.K.)
| | - Anna Ilyasova
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 ul. Akademicheskaya, 153045 Ivanovo, Russia; (A.B.); (T.L.); (M.Y.); (A.I.); (D.K.)
| | - Galina Elyashevich
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, 31 Bolshoy pr., 199004 St. Petersburg, Russia; (G.E.); (V.L.)
| | - Viktor Lavrentyev
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, 31 Bolshoy pr., 199004 St. Petersburg, Russia; (G.E.); (V.L.)
| | - Denis Kalmykov
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 ul. Akademicheskaya, 153045 Ivanovo, Russia; (A.B.); (T.L.); (M.Y.); (A.I.); (D.K.)
- A.V. Topchiev Institute of Petrochemical Synthesis of the Russian Academy of Sciences, 29 Leninsky Prospect, 119991 Moscow, Russia;
| | - Alexey Volkov
- A.V. Topchiev Institute of Petrochemical Synthesis of the Russian Academy of Sciences, 29 Leninsky Prospect, 119991 Moscow, Russia;
| | - Konstantin Pochivalov
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 ul. Akademicheskaya, 153045 Ivanovo, Russia; (A.B.); (T.L.); (M.Y.); (A.I.); (D.K.)
| |
Collapse
|
9
|
Magomedova AG, Rabadanova AA, Shuaibov AO, Selimov DA, Sobola DS, Rabadanov KS, Giraev KM, Orudzhev FF. Combination NIPS/TIPS Synthesis of α-Fe 2O 3 and α/γ-Fe 2O 3 Doped PVDF Composite for Efficient Piezocatalytic Degradation of Rhodamine B. Molecules 2023; 28:6932. [PMID: 37836776 PMCID: PMC10574218 DOI: 10.3390/molecules28196932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 09/30/2023] [Accepted: 10/01/2023] [Indexed: 10/15/2023] Open
Abstract
Highly porous membranes based on polyvinylidene fluoride (PVDF) with the addition of nanoscale particles of non-magnetic and magnetic iron oxides were synthesized using a combined method of non-solvent induced phase separation (NIPS) and thermo-induced phase separation (TIPS) based on the technique developed by Dr. Blade. The obtained membranes were characterized using SEM, EDS, XRD, IR, diffuse reflectance spectroscopy, and fluorescent microscopy. It was shown that the membranes possessed a high fraction of electroactive phase, which increased up to a maximum of 96% with the addition of 2 wt% of α-Fe2O3 and α/γ-Fe2O3 nanoparticles. It was demonstrated that doping PVDF with nanoparticles contributed to the reduction of pore size in the membrane. All membranes exhibited piezocatalytic activity in the degradation of Rhodamine B. The degree of degradation increased from 69% when using pure PVDF membrane to 90% when using the composite membrane. The nature of the additive did not affect the piezocatalytic activity. It was determined that the main reactive species responsible for the degradation of Rhodamine B were •OH and •O2-. It was also shown that under piezocatalytic conditions, composite membranes generated a piezopotential of approximately 2.5 V.
Collapse
Affiliation(s)
- Asiyat G. Magomedova
- Smart Materials Laboratory, Department of Inorganic Chemistry and Chemical Ecology, Dagestan State University, St. M. Gadjieva 43-a, Dagestan Republic, 367015 Makhachkala, Russia; (A.G.M.); (A.A.R.); (A.O.S.); (D.A.S.); (K.M.G.)
| | - Alina A. Rabadanova
- Smart Materials Laboratory, Department of Inorganic Chemistry and Chemical Ecology, Dagestan State University, St. M. Gadjieva 43-a, Dagestan Republic, 367015 Makhachkala, Russia; (A.G.M.); (A.A.R.); (A.O.S.); (D.A.S.); (K.M.G.)
| | - Abdulatip O. Shuaibov
- Smart Materials Laboratory, Department of Inorganic Chemistry and Chemical Ecology, Dagestan State University, St. M. Gadjieva 43-a, Dagestan Republic, 367015 Makhachkala, Russia; (A.G.M.); (A.A.R.); (A.O.S.); (D.A.S.); (K.M.G.)
| | - Daud A. Selimov
- Smart Materials Laboratory, Department of Inorganic Chemistry and Chemical Ecology, Dagestan State University, St. M. Gadjieva 43-a, Dagestan Republic, 367015 Makhachkala, Russia; (A.G.M.); (A.A.R.); (A.O.S.); (D.A.S.); (K.M.G.)
| | - Dinara S. Sobola
- Department of Physics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Technicka 10, 616 00 Brno, Czech Republic
| | - Kamil Sh. Rabadanov
- Amirkhanov Institute of Physics of Dagestan Federal Research Center, Russian Academy of Sciences, 367003 Makhachkala, Russia;
| | - Kamal M. Giraev
- Smart Materials Laboratory, Department of Inorganic Chemistry and Chemical Ecology, Dagestan State University, St. M. Gadjieva 43-a, Dagestan Republic, 367015 Makhachkala, Russia; (A.G.M.); (A.A.R.); (A.O.S.); (D.A.S.); (K.M.G.)
| | - Farid F. Orudzhev
- Smart Materials Laboratory, Department of Inorganic Chemistry and Chemical Ecology, Dagestan State University, St. M. Gadjieva 43-a, Dagestan Republic, 367015 Makhachkala, Russia; (A.G.M.); (A.A.R.); (A.O.S.); (D.A.S.); (K.M.G.)
- Amirkhanov Institute of Physics of Dagestan Federal Research Center, Russian Academy of Sciences, 367003 Makhachkala, Russia;
| |
Collapse
|
10
|
Pacholski P, Schramm S, Progent F, Aubriet F. Differentiation of Four Polyvinylidene Fluoride Polymers Based on Their End Groups by DART-FT-ICR MS and Kendrick Plots. J Am Soc Mass Spectrom 2023; 34:2278-2288. [PMID: 37647027 DOI: 10.1021/jasms.3c00202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Nowadays, synthetic polymers are produced and used in many materials for different applications. Matrix-assisted laser desorption/ionization or electrospray mass spectrometry are classically used to investigate them, but these techniques require sample preparation steps, which are not always suitable for the study of insoluble or formulated polymers. Alternatively, direct real-time (DART) ionization analysis may be conducted without sample preparation. Four polyvinylidene fluoride (PVDF) polymers involving the C2H2F2 repeating unit coming from different suppliers have been analyzed by DART Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) in negative-ion mode. The obtained mass spectra systematically displayed an oligomeric distribution between m/z 400 and 1300 of [M - H]-, [M + O2]•-, and [M + NO2]- ions. Kendrick plots were used to ease the identification of PVDF end-groups and establish a difference between the samples. Both commercial PVDF polymers shared the same α+ω end groups formula, which confirmed a similar polymerization process for their synthesis. The two other PVDFs were clearly different from the commercial ones by the occurrence of specific end-groups. MS/MS and MS3 experiments were conducted to obtain structural information on these end-groups.
Collapse
Affiliation(s)
- Pierre Pacholski
- CEA, DAM, DIF, F-91297 Arpajon, France
- Université de Lorraine, LCP-A2MC (Laboratoire de Chimie et Physique-Approche Multi-échelles des Milieux Complexes), F-57000 Metz, France
| | - Sébastien Schramm
- Université de Lorraine, LCP-A2MC (Laboratoire de Chimie et Physique-Approche Multi-échelles des Milieux Complexes), F-57000 Metz, France
| | | | - Frédéric Aubriet
- Université de Lorraine, LCP-A2MC (Laboratoire de Chimie et Physique-Approche Multi-échelles des Milieux Complexes), F-57000 Metz, France
| |
Collapse
|
11
|
Cui B, Xiao Z, Cui S, Hao S, Liu S, Gao X, Li G. Lithiated Phosphoryl Cellulose Nanocrystals Enhance Cycling Stability and Safety of Quasi-Solid-State Lithium Metal Batteries. ACS Appl Mater Interfaces 2023; 15:41537-41548. [PMID: 37671463 DOI: 10.1021/acsami.3c08559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Cycling stability and safety are two of the main challenges facing lithium metal batteries with metallic lithium as anodes. Quasi-solid-state lithium metal batteries based on gel polymer electrolytes are one of the important development directions for lithium metal batteries addressing those challenges. Herein, we prepare lithiated phosphoryl cellulose nanocrystals (PCNC-Li) as a modification material for poly(vinylidene fluoride) (PVDF) gel polymer electrolyte to improve cycling stability and safety of quasi-solid-state lithium metal batteries. The synthesized PCNC-Li tends to form a uniform network structure on the surface of the PVDF membrane, in which the phosphoryl groups grafted regularly on celluloses can regulate the transport of lithium ions. As a result, a more uniform ion flux and more stable lithium anode interface support an obviously improved cycling stability for lithium metal batteries. Moreover, the introduction of the PCNC-Li coating layer makes the modified PVDF membranes have a better thermal stability and an enhanced mechanical strength, which is beneficial for improvement of safety of lithium metal batteries. This work provides a new alternative to fabricating a better composite gel polymer electrolyte for lithium metal batteries.
Collapse
Affiliation(s)
- Baichuan Cui
- Institute of New Energy Materials Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
| | - Zhenxue Xiao
- Institute of New Energy Materials Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
| | - Shaolun Cui
- Institute of New Energy Materials Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
- Beijing WeLion New Energy Technology Co., Ltd., Beijing 102402, China
| | - Shuai Hao
- Institute of New Energy Materials Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
| | - Sheng Liu
- Institute of New Energy Materials Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
| | - Xueping Gao
- Institute of New Energy Materials Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
| | - Guoran Li
- Institute of New Energy Materials Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
| |
Collapse
|
12
|
Shao Z, Zhang X, Song Z, Liu J, Liu X, Zhang C. Simulation Guided Coaxial Electrospinning of Polyvinylidene Fluoride Hollow Fibers with Tailored Piezoelectric Performance. Small 2023; 19:e2303285. [PMID: 37196418 DOI: 10.1002/smll.202303285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/01/2023] [Indexed: 05/19/2023]
Abstract
Electrospun polyvinylidene fluoride (PVDF) piezoelectric fibers have high potential applicability in mechanical energy harvesting and self-powered sensing owing to their high electromechanical coupling capabilities. Strategies for tailoring fiber morphology have been the primary focus for realizing enhanced piezoelectric output. However, the relationship between piezoelectric performance and fiber structure remains unclear. This study fabricates PVDF hollow fibers through coaxial electrospinning, whose wall thickness can be tuned by changing the internal solution concentration. Simulation analysis demonstrates an increased effective deformation of the hollow fiber as enlarging inner diameter, resulting in enhanced piezoelectric output, which is in excellent agreement with the experimental results. This study is the first to unravel the influence mechanism of morphology regulation of a PVDF hollow fiber on its piezoelectric performance from both simulation and experimental aspects. The optimal PVDF hollow fiber piezoelectric energy harvester (PEH) delivers a piezoelectric output voltage of 32.6 V, ≈3 times that of the solid PVDF fiber PEH. Furthermore, the electrical output of hollow fiber PEH can be stably stored in secondary energy storage systems to power microelectronics. This study highlights an efficient approach for reconciling the simulation and tailoring the fiber PEH morphology for enhanced performances for future self-powered systems.
Collapse
Affiliation(s)
- Zhuzhu Shao
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Xuan Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Zihan Song
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Jingfeng Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Xingang Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Chuhong Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| |
Collapse
|
13
|
Aguirre-Corona RW, Del Ángel-Sánchez K, Ulloa-Castillo NA, Rodríguez-Salinas JJ, Olvera-Trejo D, Perales-Martínez IA, Martínez-Romero O, Elías-Zúñiga A. β-Phase Enhancement of Force Spun Composite Nanofibers for Sensing Applications. Polymers (Basel) 2023; 15:3580. [PMID: 37688207 PMCID: PMC10490387 DOI: 10.3390/polym15173580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/17/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023] Open
Abstract
In this study, a piezoelectric harvesting device was developed using polyvinylidene fluoride (PVDF) nanofibers reinforced with either BaTiO3 nanoparticles or graphene powder. BaTiO3 nanoparticles were synthesized through the sol-gel method with an average size of approximately 32 nm. The PVDF nanofibers, along with the nanoparticle composites in an acetone-N,N-dimethylformamide mixture, were produced using a centrifugal Forcespinning™ machine, resulting in a heterogeneous arrangement of fiber meshes, with an average diameter of 1.6 μm. Experimental tests revealed that the electrical performance of the fabricated harvester reached a maximum value of 35.8 Voc, demonstrating the potential of BaTiO3/ PVDF-based piezoelectric devices for designing wearable applications such as body-sensing and energy-harvesting devices.
Collapse
Affiliation(s)
- Renato Wenceslao Aguirre-Corona
- Institute of Advanced Materials for Sustainable Manufacturing, Tecnologico de Monterrey, Av. Eugenio Garza Sada Sur 2501, Monterrey 64849, N.L., Mexico; (R.W.A.-C.); (K.D.Á.-S.); (D.O.-T.); (I.A.P.-M.)
| | - Karina Del Ángel-Sánchez
- Institute of Advanced Materials for Sustainable Manufacturing, Tecnologico de Monterrey, Av. Eugenio Garza Sada Sur 2501, Monterrey 64849, N.L., Mexico; (R.W.A.-C.); (K.D.Á.-S.); (D.O.-T.); (I.A.P.-M.)
| | - Nicolás Antonio Ulloa-Castillo
- Center for Innovation in Digital Technologies, School of Engineering and Sciences, Tecnologico de Monterrey, Av. Eugenio Garza Sada Sur 2501, Monterrey 64849, N.L., Mexico;
| | - Juan José Rodríguez-Salinas
- School of Engineering and Sciences, Tecnologico de Monterrey, Av. Eugenio Garza Sada Sur 2501, Monterrey 64849, N.L., Mexico;
| | - Daniel Olvera-Trejo
- Institute of Advanced Materials for Sustainable Manufacturing, Tecnologico de Monterrey, Av. Eugenio Garza Sada Sur 2501, Monterrey 64849, N.L., Mexico; (R.W.A.-C.); (K.D.Á.-S.); (D.O.-T.); (I.A.P.-M.)
| | - Imperio Anel Perales-Martínez
- Institute of Advanced Materials for Sustainable Manufacturing, Tecnologico de Monterrey, Av. Eugenio Garza Sada Sur 2501, Monterrey 64849, N.L., Mexico; (R.W.A.-C.); (K.D.Á.-S.); (D.O.-T.); (I.A.P.-M.)
| | - Oscar Martínez-Romero
- Institute of Advanced Materials for Sustainable Manufacturing, Tecnologico de Monterrey, Av. Eugenio Garza Sada Sur 2501, Monterrey 64849, N.L., Mexico; (R.W.A.-C.); (K.D.Á.-S.); (D.O.-T.); (I.A.P.-M.)
| | - Alex Elías-Zúñiga
- Institute of Advanced Materials for Sustainable Manufacturing, Tecnologico de Monterrey, Av. Eugenio Garza Sada Sur 2501, Monterrey 64849, N.L., Mexico; (R.W.A.-C.); (K.D.Á.-S.); (D.O.-T.); (I.A.P.-M.)
| |
Collapse
|
14
|
Palanisamy G, Muhammed AP, Thangarasu S, Oh TH. Investigating the Sulfonated Chitosan/ Polyvinylidene Fluoride-Based Proton Exchange Membrane with fSiO 2 as Filler in Microbial Fuel Cells. Membranes (Basel) 2023; 13:758. [PMID: 37755180 PMCID: PMC10536340 DOI: 10.3390/membranes13090758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/17/2023] [Accepted: 08/22/2023] [Indexed: 09/28/2023]
Abstract
Chitosan (CS), a promising potential biopolymer with exquisite biocompatibility, economic viability, hydrophilicity, and chemical modifications, has drawn interest as an alternative material for proton exchange membrane (PEM) fabrication. However, CS in its original form exhibited low proton conductivity and mechanical stability, restricting its usage in PEM development. In this work, chitosan was functionalized (sulfonic acid (-SO3H) groups)) to enhance proton conductivity. The sulfonated chitosan (sCS) was blended with polyvinylidene fluoride (PVDF) polymer, along with the incorporation of functionalized SiO2 (-OH groups), for fabricating chitosan-based composite proton exchange membranes to enhance microbial fuel cell (MFC) performances. The results show that adding functionalized inorganic fillers (fSiO2) into the membrane enhances the mechanical, thermal, and anti-biofouling behavior. From the results, the PVDF/sCS/fSiO2 composite membrane exhibited enhanced proton conductivity 1.0644 × 10-2 S cm-1 at room temperature and increased IEC and mechanical and chemical stability. Furthermore, this study presents a revolutionary way to generate environmentally friendly natural polymer-based membrane materials for developing PEM candidates for enhanced MFC performances in generating bioelectricity and wastewater treatment.
Collapse
Affiliation(s)
| | | | | | - Tae Hwan Oh
- Department of Chemical Engineering, Yeungnam University, Gyeongsan 8541, Republic of Korea; (A.P.M.); (S.T.)
| |
Collapse
|
15
|
Zhao X, Zhao Q, Chang Y, Guo M, Wu S, Wang H, Hou Y, Zhang L, Liu C, Wu H, Liang Y, Ren L. Study on Design and Preparation of Conductive Polyvinylidene Fluoride Fibrous Membrane with High Conductivity via Electrostatic Spinning. Polymers (Basel) 2023; 15:3174. [PMID: 37571068 PMCID: PMC10421049 DOI: 10.3390/polym15153174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 07/17/2023] [Accepted: 07/24/2023] [Indexed: 08/13/2023] Open
Abstract
The novel conductive polyvinylidene fluoride (PVDF) fibrous membrane with high conductivity and sensitivity was successfully prepared via electrostatic spinning and efficient silver reduction technology. Based on the selective dissolution of porogen of polyvinylpyrrolidone (PVP), the porous PVDF fibrous membrane with excellent adsorbability and mechanical strength was obtained, providing a structure base for the preparation of conductive PVDF fibrous membrane with silver nanoparticles (AgNPs-PVDF). The Ag+ in the AgNO3 mixed solution with PVP was absorbed and maintained in the inner parts and surface of the porous structure. After the reducing action of ascorbic acid-mixed solution with PVP, silver nanoparticles were obtained tightly in an original porous PVDF fibrous membrane, realizing the maximum conductivity of 2500 S/m. With combined excellent conductivity and mechanical strength, the AgNPs-PVDF fibrous membrane effectively and sensitively detected strain signals of throat vocalization, elbow, wrist, finger, and knee (gauge factor of 23). The electrospun conductive AgNPs-PVDF combined the characteristics of low resistance, high mechanical strength, and soft breathability, which provided a new and effective preparation method of conductive fibers for practical application in wearable devices.
Collapse
Affiliation(s)
- Xinhua Zhao
- The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
| | - Qian Zhao
- The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
| | - Yanjiao Chang
- College of Food Science and Engineering, Jilin University, Changchun 130062, China
| | - Mingzhuo Guo
- The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
| | - Siyang Wu
- The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
| | - Hanqi Wang
- The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
| | - Yihao Hou
- The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
| | - Luyu Zhang
- The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
| | - Chang Liu
- The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
| | - Han Wu
- The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
| | - Yunhong Liang
- The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
| | - Luquan Ren
- The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
| |
Collapse
|
16
|
Choi CW, Jin JW, Kang KW. Optimization of Electrical and Mechanical Properties through the Adjustment of Design Parameters in the Wet Spinning Process of Carbon Nanotube/ Polyvinylidene Fluoride Fibers Using Response Surface Methodology. Polymers (Basel) 2023; 15:3090. [PMID: 37514479 PMCID: PMC10384902 DOI: 10.3390/polym15143090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/14/2023] [Accepted: 07/16/2023] [Indexed: 07/30/2023] Open
Abstract
The optimal process conditions for fabricating carbon nanotube (CNT)/polyvinylidene fluoride (PVDF) fibers with varying properties using a wet spinning process were experimentally determined. A dope solution was prepared using multi-walled nanotubes, PVDF, and dimethylacetamide, and appropriate materials were selected. Design parameters affecting the chemical and physical properties of CNT/PVDF fibers, such as bath concentration, bath temperature, drying temperature, and elongation, were determined using a response surface method. The wet-spinning conditions were analyzed based on the tensile strength and electrical conductivity of the fibers using an analysis of variance and interaction analysis. The optimized process conditions for fabricating CNT/PVDF fibers with different properties were derived and verified through fabrication using the determined design parameters.
Collapse
Affiliation(s)
- Chan-Woong Choi
- Department of Green Mobility R&D, Jeonbuk Institute of Automotive Convergence Technology, Gunsan 54158, Republic of Korea
| | - Ji-Won Jin
- Korea Testing Laboratory, System Verification and Validation Center, Seoul 08389, Republic of Korea
| | - Ki-Weon Kang
- Department of Mechanical Engineering, Kunsan National University, Gunsan 54150, Republic of Korea
| |
Collapse
|
17
|
Wu D, Luo M, Yang R, Hu X, Lu C. Achieve High Dielectric and Energy-Storage Density Properties by Employing Cyanoethyl Cellulose as Fillers in PVDF-Based Polymer Composites. Materials (Basel) 2023; 16:4201. [PMID: 37374385 DOI: 10.3390/ma16124201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 05/29/2023] [Accepted: 06/04/2023] [Indexed: 06/29/2023]
Abstract
Fluoropolymer/inorganic nanofiller composites are considered to be ideal polymer dielectrics for energy storage applications because of their high dielectric constant and high breakdown strength. However, these advantages are a trade-off with the unavoidable aggregation of the inorganic nanofillers, which result in a reduced discharge of the energy storage density. To address this problem, we developed polyvinylidene fluoride (PVDF) graft copolymer/cellulose-derivative composites to achieve high-dielectric and energy-storage density properties. An enhanced dielectric constant and improved energy density were achieved with this structure. The optimal composites exhibited a high discharge energy density of 8.40 J/cm3 at 300 MV/m. This work provides new insight into the development of all-organic composites with bio-based nanofillers.
Collapse
Affiliation(s)
- Deqi Wu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211800, China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing 211800, China
| | - Mingxuan Luo
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211800, China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing 211800, China
| | - Rui Yang
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211800, China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing 211800, China
| | - Xin Hu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211800, China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing 211800, China
| | - Chunhua Lu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211800, China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing 211800, China
| |
Collapse
|
18
|
Zhang R, Deng C, Hou X, Li T, Lu Y, Liu F. Preparation and Characterization of a Janus Membrane with an "Integrated" Structure and Adjustable Hydrophilic Layer Thickness. Membranes (Basel) 2023; 13:415. [PMID: 37103842 PMCID: PMC10143739 DOI: 10.3390/membranes13040415] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/19/2023] [Accepted: 03/20/2023] [Indexed: 06/19/2023]
Abstract
Oil-water emulsions are types of wastewater that are difficult to treat. A polyvinylidene fluoride hydrophobic matrix membrane was modified using a hydrophilic polymer, poly(vinylpyrrolidone-vinyltriethoxysilane), to form a representative Janus membrane with asymmetric wettability. The performance parameters of the modified membrane, such as the morphological structure, the chemical composition, the wettability, the hydrophilic layer thickness, and the porosity, were characterized. The results showed that the hydrolysis, migration, and thermal crosslinking of the hydrophilic polymer in the hydrophobic matrix membrane contributed to an effective hydrophilic layer on the surface. Thus, a Janus membrane with unchanged membrane porosity, a hydrophilic layer with controllable thickness, and hydrophilic/hydrophobic layer "structural integration" was successfully prepared. The Janus membrane was used for the switchable separation of oil-water emulsions. The separation flux of the oil-in-water emulsions on the hydrophilic surface was 22.88 L·m-2·h-1 with a separation efficiency of up to 93.35%. The hydrophobic surface exhibited a separation flux of 17.45 L·m-2·h-1 with a separation efficiency of 91.47% for the water-in-oil emulsions. Compared to the lower flux and separation efficiency of purely hydrophobic and hydrophilic membranes, the Janus membrane exhibited better separation and purification effects for both oil-water emulsions.
Collapse
Affiliation(s)
- Ruixian Zhang
- Guangxi Key Laboratory for Polysaccharide Materials and Modification, Guangxi Higher Education Institutes Key Laboratory for New Chemical and Biological Transformation Process Technology, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning 530006, China
| | - Chengyu Deng
- Guangxi Key Laboratory for Polysaccharide Materials and Modification, Guangxi Higher Education Institutes Key Laboratory for New Chemical and Biological Transformation Process Technology, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning 530006, China
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Xueyi Hou
- Guangxi Key Laboratory for Polysaccharide Materials and Modification, Guangxi Higher Education Institutes Key Laboratory for New Chemical and Biological Transformation Process Technology, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning 530006, China
| | - Tiantian Li
- School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Yanyue Lu
- Guangxi Key Laboratory for Polysaccharide Materials and Modification, Guangxi Higher Education Institutes Key Laboratory for New Chemical and Biological Transformation Process Technology, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning 530006, China
| | - Fu Liu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| |
Collapse
|
19
|
Choi G, Sohn S, Park I. Electrostatic Induction Nanogenerator Boosted by One-Dimensional Metastructure: Application to Energy and Information Transmitting Smart Tag System. Adv Sci (Weinh) 2023; 10:e2205141. [PMID: 36683241 PMCID: PMC10104663 DOI: 10.1002/advs.202205141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 12/24/2022] [Indexed: 06/17/2023]
Abstract
The recent application of the internet of things demands the ubiquitous utilization of data and electrical power. Even with the development of a wide variety of energy-harvesting technologies, few studies have reported a device transporting electrical energy and data simultaneously. This paper reports an electrostatic induction nanogenerator (ESING) consisting of a one-dimensional metastructure that can modulate the output voltage based on the resonance of ultrasound waves to transmit energy and data simultaneously. The ESING device is fabricated using electronegative poly(vinylidene fluoride) (PVDF) membrane using a phase inversion process. The output voltage from the ESING device exhibits periodic resonant peaks as the gap between the PVDF membrane and the Al electrode changes, showing an up to 35-fold difference between the maximum and minimum output voltages depending on the resonance state. The energy and electrical signal can be transmitted simultaneously in free space because the ESING converts energy from high-frequency ultrasound waves. This paper provides proof of concept for a data and energy-transferable smart tag device based on ESING devices exhibiting resonant and non-resonant states. A device consisting of four ESINGs for a 4-bit signal is implemented to demonstrate 16 signals.
Collapse
Affiliation(s)
- Geon‐Ju Choi
- Department of Materials Science and EngineeringSeoul National University of Science and TechnologySeoul01811Republic of Korea
| | - Sang‐Hyun Sohn
- Department of Materials Science and EngineeringSeoul National University of Science and TechnologySeoul01811Republic of Korea
| | - Il‐Kyu Park
- Department of Materials Science and EngineeringSeoul National University of Science and TechnologySeoul01811Republic of Korea
| |
Collapse
|
20
|
Jiménez-Robles R, Izquierdo M, Martínez-Soria V, Martí L, Monleón A, Badia JD. Stability of Superhydrophobicity and Structure of PVDF Membranes Treated by Vacuum Oxygen Plasma and Organofluorosilanisation. Membranes (Basel) 2023; 13:314. [PMID: 36984700 PMCID: PMC10054235 DOI: 10.3390/membranes13030314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/25/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
Superhydrophobic poly(vinylidene fluoride) (PVDF) membranes were obtained by a surface treatment consisting of oxygen plasma activation followed by functionalisation with a mixture of silica precursor (SiP) (tetraethyl-orthosilicate [TEOS] or 3-(triethoxysilyl)-propylamine [APTES]) and a fluoroalkylsilane (1H,1H,2H,2H-perfluorooctyltriethoxysilane), and were benchmarked with coated membranes without plasma activation. The modifications acted mainly on the surface, and the bulk properties remained stable. From a statistical design of experiments on surface hydrophobicity, the type of SiP was the most relevant factor, achieving the highest water contact angles (WCA) with the use of APTES, with a maximum WCA higher than 155° for membranes activated at a plasma power discharge of 15 W during 15 min, without membrane degradation. Morphological changes were observed on the membrane surfaces treated under these plasma conditions, showing a pillar-like structure with higher surface porosity. In long-term stability tests under moderate water flux conditions, the WCA of coated membranes which were not activated by oxygen plasma decreased to approximately 120° after the first 24 h (similar to the pristine membrane), whilst the WCA of plasma-treated membranes was maintained around 130° after 160 h. Thus, plasma pre-treatment led to membranes with a superhydrophobic performance and kept a higher hydrophobicity after long-term operations.
Collapse
Affiliation(s)
- Ramón Jiménez-Robles
- Research Group in Materials Technology and Sustainability (MATS), Department of Chemical Engineering, School of Engineering, University of Valencia, Avda. Universitat s/n, 46100 Burjassot, Spain
| | - Marta Izquierdo
- Research Group in Materials Technology and Sustainability (MATS), Department of Chemical Engineering, School of Engineering, University of Valencia, Avda. Universitat s/n, 46100 Burjassot, Spain
| | - Vicente Martínez-Soria
- Research Group in Materials Technology and Sustainability (MATS), Department of Chemical Engineering, School of Engineering, University of Valencia, Avda. Universitat s/n, 46100 Burjassot, Spain
| | - Laura Martí
- Decarbonisation Department, Plastic Technology Institute (AIMPLAS), C/Gustave Eiffel 4, 46980 Paterna, Spain
| | - Alicia Monleón
- Decarbonisation Department, Plastic Technology Institute (AIMPLAS), C/Gustave Eiffel 4, 46980 Paterna, Spain
- Department of Organic Chemistry, School of Chemistry, University of Valencia, Dr Moliner 50, 46100 Burjassot, Spain
| | - José David Badia
- Research Group in Materials Technology and Sustainability (MATS), Department of Chemical Engineering, School of Engineering, University of Valencia, Avda. Universitat s/n, 46100 Burjassot, Spain
| |
Collapse
|
21
|
Zhang Q, Cui J, Zhao S, Zhang G, Gao A, Yan Y. Development of Electromagnetic-Wave-Shielding Polyvinylidene Fluoride-Ti 3C 2T x MXene-Carbon Nanotube Composites by Improving Impedance Matching and Conductivity. Nanomaterials (Basel) 2023; 13:417. [PMID: 36770378 PMCID: PMC9921545 DOI: 10.3390/nano13030417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/07/2023] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
Absorption-dominated electromagnetic interference (EMI) shielding is attained by improving impedance matching and conductivity through structural design. Polyvinylidene fluoride (PVDF)-Ti3C2Tx MXene-single-walled carbon nanotubes (SWCNTs) composites with layered heterogeneous conductive fillers and segregated structures were prepared through electrostatic flocculation and hot pressing of the PVDF composite microsphere-coated MXene and SWCNTs in a layer-by-layer fashion. Results suggest that the heterogeneous fillers improve impedance matching and layered coating, and hot compression allows the MXene and SWCNTs to form a continuous conducting network at the PVDF interface, thereby conferring excellent conductivity to the composite. The PVDF-MXene-SWCNTs composite showed a conductivity of 2.75 S cm-1 at 2.5% MXene and 1% SWCNTs. The EMI shielding efficiency (SE) and contribution from absorption loss to the total EMI SE of PVDF-MXene-SWCNTs were 46.1 dB and 85.7%, respectively. Furthermore, the PVDF-MXene-SWCNTs composite exhibited excellent dielectric losses and impedance matching. Therefore, the layered heteroconductive fillers in a segregated structure optimize impedance matching, provide excellent conductivity, and improve absorption-dominated electromagnetic shielding.
Collapse
Affiliation(s)
- Qimei Zhang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- School of Materials and Environmental Engineering, Chizhou University, Chizhou 247000, China
| | - Jian Cui
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Shuai Zhao
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Guangfa Zhang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Ailin Gao
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yehai Yan
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| |
Collapse
|
22
|
Wu S, Zabihi F, Yeap RY, Darestani MRY, Bahi A, Wan Z, Yang S, Servati P, Ko FK. Cesium Lead Halide Perovskite Decorated Polyvinylidene Fluoride Nanofibers for Wearable Piezoelectric Nanogenerator Yarns. ACS Nano 2023; 17:1022-1035. [PMID: 36599026 PMCID: PMC9878976 DOI: 10.1021/acsnano.2c07320] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 12/09/2022] [Indexed: 05/29/2023]
Abstract
Piezoelectric nanogenerators (PENGs) provide a viable solution to convert the mechanical energy generated by body movement to electricity. One-dimensional yarns offer a platform for flexible wearable textile PENGs, which can conform to body for comfort and efficient energy harvesting. In this context, we report a flexible piezoelectric yarn, assembled by one-step cocentric deposition of cesium lead halide perovskite decorated polyvinylidene fluoride (PVDF) nanofibers, on a stainless-steel yarn. Perovskite crystals were formed in situ during electrospinning. Our work demonstrates a nanofiber morphology in which perovskite crystals spread over the nanofiber, leading to a rough surface, and complementing piezoelectric nanocomposite formation with PVDF for superior stress excitation. We investigated how the halide anions of perovskite affect the piezoelectric performance of PENG yarns by comparing CsPbBr3 and CsPbI2Br. Effects of the perovskite concentration, annealing temperature, and deposition time on the piezoelectric properties of PENG yarns were investigated. Devices assembled with a single yarn of CsPbI2Br decorated PVDF nanofibers yield the optimal performance with an output voltage of 8.3 V and current of 1.91 μA in response to pressing from an actuator and used to charge capacitors for powering electronics. After aging in the ambient environment for 3 months, the device maintained its performance during 19,200 cycles of mechanical stresses. The excellent and stable electrical performance can be ascribed to the optimized crystallization of CsPbI2Br crystals, their complementing performance with PVDF, and formation of nanofibers with uniformity and strength. The flexibility of piezoelectric yarns enables them to be bent, twisted, braided, and woven for different textile integrations while harvesting energy from body movements, demonstrating the potential for wearable mechanical energy harvesting.
Collapse
Affiliation(s)
- Siying Wu
- Department
of Materials Engineering, University of
British Columbia, Vancouver, British ColumbiaV6T 1Z4, Canada
| | - Fatemeh Zabihi
- Texavie
Technologies Inc., Vancouver, British ColumbiaV6Z 2R4, Canada
- College
of Materials Science and Engineering, Donghua
University, Shanghai201620, People’s
Republic of China
| | - Rou Yi Yeap
- Texavie
Technologies Inc., Vancouver, British ColumbiaV6Z 2R4, Canada
| | - Mohammad Reza Yousefi Darestani
- Texavie
Technologies Inc., Vancouver, British ColumbiaV6Z 2R4, Canada
- School
of Biomedical Engineering, University of
British Columbia, Vancouver, British ColumbiaV6T 1Z3, Canada
| | - Addie Bahi
- Department
of Materials Engineering, University of
British Columbia, Vancouver, British ColumbiaV6T 1Z4, Canada
| | - Zeyu Wan
- Department
of Materials Engineering, University of
British Columbia, Vancouver, British ColumbiaV6T 1Z4, Canada
| | - Shengyuan Yang
- College
of Materials Science and Engineering, Donghua
University, Shanghai201620, People’s
Republic of China
| | - Peyman Servati
- Texavie
Technologies Inc., Vancouver, British ColumbiaV6Z 2R4, Canada
- Department
of Electrical and Computer Engineering, University of British Columbia, Vancouver, British ColumbiaV6T 1Z4, Canada
| | - Frank K. Ko
- Department
of Materials Engineering, University of
British Columbia, Vancouver, British ColumbiaV6T 1Z4, Canada
| |
Collapse
|
23
|
Lee K, Jeong Y, Lee CH, Lee J, Seo HS, Cho Y. Impedance Coupled Voltage Boosting Circuit for Polyvinylidene Fluoride Based Energy Harvester. Sensors (Basel) 2022; 23:137. [PMID: 36616739 PMCID: PMC9823552 DOI: 10.3390/s23010137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/17/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Polyvinylidene fluoride (PVDF) is an emerging method for energy harvesting by fluid motion with superior flexibility. However, the PVDF energy harvester, which has a high internal impedance and generates a low voltage, has a large power transmission loss. To overcome this problem, we propose an impedance-coupled voltage-boosting circuit (IC-VBC) that reduces the impedance of the PVDF energy harvester and boosts the voltage. SPICE simulation results show that IC-VBC reduces the impedance of the PVDF energy harvester from 4.3 MΩ to 320 kΩ and increases the output voltage by 2.52 times. We successfully charged lithium-ion batteries using the PVDF energy harvester and IC-VBC with low-speed wind power generation.
Collapse
Affiliation(s)
- Kibae Lee
- Department of Ocean System Engineering, Jeju National University, Jeju 63243, Republic of Korea
| | - Yoonsang Jeong
- Department of Ocean System Engineering, Jeju National University, Jeju 63243, Republic of Korea
| | - Chong Hyun Lee
- Department of Ocean System Engineering, Jeju National University, Jeju 63243, Republic of Korea
| | - Jongkil Lee
- Department of Mechanical Engineering Education, Andong National University, Andong 36729, Republic of Korea
| | - Hee-Seon Seo
- Agency for Defense Development, Daejeon 34186, Republic of Korea
| | - Yohan Cho
- Agency for Defense Development, Daejeon 34186, Republic of Korea
| |
Collapse
|
24
|
Hedau B, Kang BC, Ha TJ. Enhanced Triboelectric Effects of Self-Poled MoS 2-Embedded PVDF Hybrid Nanocomposite Films for Bar-Printed Wearable Triboelectric Nanogenerators. ACS Nano 2022; 16:18355-18365. [PMID: 36040188 DOI: 10.1021/acsnano.2c06257] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Self-poled molybdenum disulfide embedded polyvinylidene fluoride (MoS2@PVDF) hybrid nanocomposite films fabricated by a bar-printing process are demonstrated to improve the output performances of triboelectric nanogenerators (TENGs). Comparative analyses of MoS2@PVDF films with different MoS2 concentrations and the synergic effect based on postannealing at different temperatures were examined to increase the triboelectric open-circuit voltage and the short-circuit current (∼200 V and ∼11.8 μA, respectively). A further comprehensive study of the structural and electrical changes that occur on the surfaces of the proposed hybrid nanocomposite films revealed that both MoS2 incorporation into PVDF and postannealing can individually promote the formation of the β-crystal phase and generate polarity in the PVDF. In addition, MoS2, which provides triboelectric trap states, was found to play a significant role in improving the charge capture capacity of the nanocomposite film and increasing the potential difference between two electrodes of TENGs. The produced electrical energy of the developed wearable TENGs with excellent operational stability for a long duration was utilized to power a variety of mobile smart gadgets in addition to low-power electronic devices. We believe that this study can provide a simple and effective approach to improving the energy-harvesting capabilities of wearable TENGs based on hybrid nanocomposite films.
Collapse
Affiliation(s)
- Bhavna Hedau
- Department of Electronic Materials Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Byeong-Cheol Kang
- Department of Electronic Materials Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Tae-Jun Ha
- Department of Electronic Materials Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
| |
Collapse
|
25
|
Torres-Rodriguez J, E. Bedolla D, D’Amico F, Koopmann AK, Vaccari L, Saccomano G, Kohns R, Huesing N. Polyvinylidene Fluoride Aerogels with Tailorable Crystalline Phase Composition. Gels 2022; 8:gels8110727. [PMID: 36354635 PMCID: PMC9689208 DOI: 10.3390/gels8110727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/02/2022] [Accepted: 11/07/2022] [Indexed: 11/11/2022] Open
Abstract
In this work, polyvinylidene fluoride (PVDF) aerogels with a tailorable phase composition were prepared by following the crystallization-induced gelation principle. A series of PVDF wet gels (5 to 12 wt.%) were prepared from either PVDF−DMF solutions or a mixture of DMF and ethanol as non-solvent. The effects of the non-solvent concentration on the crystalline composition of the PVDF aerogels were thoroughly investigated. It was found that the nucleating role of ethanol can be adjusted to produce low-density PVDF aerogels, whereas the changes in composition by the addition of small amounts of water to the solution promote the stabilization of the valuable β and γ phases. These phases of the aerogels were monitored by FTIR and Raman spectroscopies. Furthermore, the crystallization process was followed by in-time and in situ ATR−FTIR spectroscopy. The obtained aerogels displayed specific surface areas > 150 m2 g−1, with variable particle morphologies that are dependent on the non-solvent composition, as observed by using SEM and Synchrotron Radiation Computed micro-Tomography (SR-μCT).
Collapse
Affiliation(s)
- Jorge Torres-Rodriguez
- Chemistry and Physics of Materials, Paris-Lodron-University of Salzburg, Jakob Haringer-Str. 2A, 5020 Salzburg, Austria
- Salzburg Center for Smart Materials, Jakob Haringer-Str. 2A, 5020 Salzburg, Austria
| | - Diana E. Bedolla
- Elettra-Sincrotrone Trieste, SS14 Km 163.5, 34149 Trieste, Italy
- Area Science Park, Padriciano 99, 34149 Trieste, Italy
| | | | - Ann-Kathrin Koopmann
- Chemistry and Physics of Materials, Paris-Lodron-University of Salzburg, Jakob Haringer-Str. 2A, 5020 Salzburg, Austria
- Salzburg Center for Smart Materials, Jakob Haringer-Str. 2A, 5020 Salzburg, Austria
| | - Lisa Vaccari
- Elettra-Sincrotrone Trieste, SS14 Km 163.5, 34149 Trieste, Italy
| | - Giulia Saccomano
- Elettra-Sincrotrone Trieste, SS14 Km 163.5, 34149 Trieste, Italy
- Department of Engineering and Architecture, University of Trieste, Via Alfonso Valerio 6/1, 34127 Trieste, Italy
| | - Richard Kohns
- Chemistry and Physics of Materials, Paris-Lodron-University of Salzburg, Jakob Haringer-Str. 2A, 5020 Salzburg, Austria
- Salzburg Center for Smart Materials, Jakob Haringer-Str. 2A, 5020 Salzburg, Austria
| | - Nicola Huesing
- Chemistry and Physics of Materials, Paris-Lodron-University of Salzburg, Jakob Haringer-Str. 2A, 5020 Salzburg, Austria
- Salzburg Center for Smart Materials, Jakob Haringer-Str. 2A, 5020 Salzburg, Austria
- Correspondence:
| |
Collapse
|
26
|
Dallaev R, Pisarenko T, Sobola D, Orudzhev F, Ramazanov S, Trčka T. Brief Review of PVDF Properties and Applications Potential. Polymers (Basel) 2022; 14. [PMID: 36432920 DOI: 10.3390/polym14224793] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/27/2022] [Accepted: 10/31/2022] [Indexed: 11/09/2022] Open
Abstract
Currently, there is an ever-growing interest in carbon materials with increased deformation-strength, thermophysical parameters. Due to their unique physical and chemical properties, such materials have a wide range of applications in various industries. Many prospects for the use of polymer composite materials based on polyvinylidene fluoride (PVDF) for scientific and technical purposes explain the plethora of studies on their characteristics "structure-property", processing, application and ecology which keep appearing. Building a broader conceptual picture of new generation polymeric materials is feasible with the use of innovative technologies; thus, achieving a high level of multidisciplinarity and integration of polymer science; its fundamental problems are formed, the solution of which determines a significant contribution to the natural-scientific picture of the modern world. This review provides explanation of PVDF advanced properties and potential applications of this polymer material in its various forms. More specifically, this paper will go over PVDF trademarks presently available on the market, provide thorough overview of the current and potential applications. Last but not least, this article will also delve into the processing and chemical properties of PVDF such as radiation carbonization, β-phase formation, etc.
Collapse
|
27
|
Guo Q, Yu Y, Xia S, Shen C, Hu D, Deng W, Dong D, Zhou X, Chen GZ, Liu Z. CNT/PVDF Composite Coating Layer on Cu with a Synergy of Uniform Current Distribution and Stress Releasing for Improving Reversible Li Plating/Stripping. ACS Appl Mater Interfaces 2022; 14:46043-46055. [PMID: 36174108 DOI: 10.1021/acsami.2c13193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The uncontrollable formation of polymorphous Li deposits, e.g., whiskers, mosses, or dendrites resulting from nonuniform interfacial current distribution and internal stress release in the upward direction on the conventional current collector (e.g., Cu foil) of Li metal rechargeable batteries with a lithium-metal-free negatrode (LMFRBs), leads to rapid performance degradation or serious safety problems. The 3D carbon nanotubes (CNTs) skeleton has been proven to effectively reduce the current density and eliminate the internal accumulated stress. However, remarkable electrolyte decomposition, inherent Li source consumption due to repeated SEI formation, and Li+ intercalation in CNTs limit the application of 3D CNTs skeleton. Thus, it is necessary to avoid the side effects of the 3D CNTs skeleton and retain uniform interfacial current distribution and stress mitigation. In this work, we integrate the CNTs network with a soft functional polymer polyvinylidene fluoride (PVDF) to form a relatively dense coating layer on Cu foil, which can shield the contact between the internal surface of the 3D CNTs framework and the electrolyte. Simultaneously, the Li-F-rich SEI resulting from the partial reduction of PVDF with deposited Li and the soft nature of the coating layer release the accumulation of internal stress in the horizontal direction, resulting in mosses/whisker-free Li deposition. Thus, improved Li deposition/dissolution and stable cycling performance of the LMFRBs can be achieved.
Collapse
Affiliation(s)
- Qiang Guo
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province and Advanced Li-Ion Battery Engineering Laboratory of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (CAS), Ningbo 315201, China
- Department of Chemical and Environmental Engineering, The University of Nottingham Ningbo China, Ningbo 315100, P. R. China
- Department of Chemical and Environmental Engineering, Faculty of Engineering, The University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Yanan Yu
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province and Advanced Li-Ion Battery Engineering Laboratory of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (CAS), Ningbo 315201, China
| | - Shengjie Xia
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province and Advanced Li-Ion Battery Engineering Laboratory of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (CAS), Ningbo 315201, China
| | - Cai Shen
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province and Advanced Li-Ion Battery Engineering Laboratory of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (CAS), Ningbo 315201, China
- Department of Chemical and Environmental Engineering, The University of Nottingham Ningbo China, Ningbo 315100, P. R. China
- China Beacons Institute, University of Nottingham Ningbo China, 211 Xingguang Road, Ningbo 315100, China
| | - Di Hu
- Department of Chemical and Environmental Engineering, The University of Nottingham Ningbo China, Ningbo 315100, P. R. China
- Advanced Energy and Environmental Materials & Technologies Research Group, The University of Nottingham Ningbo China, Ningbo 315100, P. R. China
| | - Wei Deng
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province and Advanced Li-Ion Battery Engineering Laboratory of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (CAS), Ningbo 315201, China
| | - Daojie Dong
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province and Advanced Li-Ion Battery Engineering Laboratory of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (CAS), Ningbo 315201, China
| | - Xufeng Zhou
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province and Advanced Li-Ion Battery Engineering Laboratory of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (CAS), Ningbo 315201, China
| | - George Zheng Chen
- Department of Chemical and Environmental Engineering, Faculty of Engineering, The University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Zhaoping Liu
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province and Advanced Li-Ion Battery Engineering Laboratory of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (CAS), Ningbo 315201, China
| |
Collapse
|
28
|
Li Y, Hu Q, Zhang R, Ma W, Pan S, Zhao Y, Wang Q, Fang P. Piezoelectric Nanogenerator Based on Electrospinning PVDF/Cellulose Acetate Composite Membranes for Energy Harvesting. Materials (Basel) 2022; 15:7026. [PMID: 36234366 PMCID: PMC9573165 DOI: 10.3390/ma15197026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/27/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
The organic piezoelectric polymer polyvinylidene fluoride (PVDF) has attracted extensive research because of its excellent flexibility and mechanical energy-harvesting properties. Here, the electrospinning technique was taken to fabricate synthesized fiber membranes of a PVDF/cellulose acetate (CA) composite. The obtained PVDF/CA electrospun fiber membranes (EFMs) were employed to prepare a flexible nanogenerator. XRD and FTIR spectroscopy revealed the enhancement of piezoelectric behavior due to an increase in β-phase in PVDF/CA EFMs compared with cast films. The PVDF/CA fibers (mass ratio of PVDF to CA = 9:1) showed an output voltage of 7.5 V and a short-circuit current of 2.1 μA under mechanical stress of 2 N and frequency of 1 Hz, which were 2.5 and two times greater than those of the pure PVDF fibers, respectively. By charging a 4.7 µF capacitor for 15 min with the voltage generated by the PVDF/CA EFMs, nine LED lamps could be lit. The work provides an effective approach to enhancing the piezoelectric effects of PVDF for low-power electronic loading of macromolecule polymers.
Collapse
Affiliation(s)
- Yuanyuan Li
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Qing Hu
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Rui Zhang
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Wenmei Ma
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Siwei Pan
- Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China
| | - Yaohong Zhao
- Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China
| | - Qing Wang
- Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China
| | - Pengfei Fang
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
| |
Collapse
|
29
|
Gao M, Zhu Y, Yan J, Wu W, Wang B. Micromechanism Study of Molecular Compatibility of PVDF/PEI Blend Membrane. Membranes (Basel) 2022; 12:809. [PMID: 36005723 PMCID: PMC9414538 DOI: 10.3390/membranes12080809] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 08/17/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
In this paper, the compatibility of polyetherimide (PEI) with different contents as a high-performance copolymer and polyvinylidene fluoride (PVDF) was studied, and 5%-20% PEI was prepared by the non-solvent-induced phase inversion method. The compatibility of PVDF and PEI was evaluated by analyzing the physical structure and properties of the blend membrane, the microstructure, the glass transition temperature Tg, the enthalpy, and the mechanism of the polymer blend enthalpy change. The results show that the blend membranes have -NH and C=O-N binding energies at X-ray photoelectron spectroscopy (XPS), which preliminarily proves that fluorine-amine bonds are formed between the polymers, and new spectra appeared by Fourier transform infrared (FTIR) and X-ray diffraction (XRD) peaks, which further proves that the two have the formation of fluorine-amine bonds, the Tg and enthalpy of the mixed membrane was increased, and a scanning electron microscope (SEM) observed that the membrane pores changed from finger-like pores to sponge-like macropores. When the content of PEI is 15%, the performance of the blended membrane is the best, the water contact angle increases to 58.5°, the porosity increases to 17.33%, the maximum force increases to 8.04 N, and the elongation at break decreases to 24.26%, the pure water flux is 1870.292 L/m2·h, and the oil rejection is 87%. In addition, the enthalpy change of polymer blending further proves that PEI and PVDF are compatible systems and have a good performance improvement for PVDF.
Collapse
Affiliation(s)
- Ming Gao
- College of Naval Architecture and Shipping, Zhejiang Ocean University, Zhoushan 316000, China
| | - Yuanlu Zhu
- College of Naval Architecture and Shipping, Zhejiang Ocean University, Zhoushan 316000, China
| | - Jiangyi Yan
- College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316000, China
| | - Weixing Wu
- College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316000, China
| | - Beifu Wang
- College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316000, China
| |
Collapse
|
30
|
Nasution MS, Mataram A, Yani I, Septano GD. Characteristics of a PVDF-Tin Dioxide Membrane Assisted by Electric Field Treatment. Membranes (Basel) 2022; 12:772. [PMID: 36005687 PMCID: PMC9413142 DOI: 10.3390/membranes12080772] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 08/02/2022] [Accepted: 08/06/2022] [Indexed: 06/15/2023]
Abstract
Polymeric membranes have good properties for filtering water. In this paper, a membrane made from polyvinylidene fluoride (PVDF) polymer with 15 wt%, 17.5 wt%, and 20 wt% polymer content, with the addition of 1 wt% of tin dioxide with electric field treatment, is presented. The electric field used was DC 15,000 V. The membrane was tested to determine its characteristics and properties. The physical properties were examined with a scanning electron microscope, and the mechanical properties of the membrane were tested by tensile testing. The maximum tensile stress was obtained at 0.746 MPa, and the minimum tensile stress was obtained at 0.487 MPa. Microscopic examination of the membrane's surface identified the shape, the structure of the fibers formed, and the amount of agglomeration. The flow rate, membrane flux, and normalized water permeability (NWP) were tested, using the water treatment performance test to measure the membrane's filtering ability.
Collapse
|
31
|
Samadi A, Salati MA, Safari A, Jouyandeh M, Barani M, Singh Chauhan NP, Golab EG, Zarrintaj P, Kar S, Seidi F, Hejna A, Saeb MR. Comparative review of piezoelectric biomaterials approach for bone tissue engineering. J Biomater Sci Polym Ed 2022; 33:1555-1594. [PMID: 35604896 DOI: 10.1080/09205063.2022.2065409] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 04/05/2022] [Accepted: 04/08/2022] [Indexed: 06/15/2023]
Abstract
Bone as a minerals' reservoir and rigid tissue of the body generating red and white blood cells supports various organs. Although the self-regeneration property of bone, it cannot regenerate spontaneously in severe damages and still remains as a challenging issue. Tissue engineering offers several techniques for regenerating damaged bones, where various biomaterials are examined to fabricate scaffolds for bone repair. Piezoelectric characteristic plays a crucial role in repairing and regenerating damaged bone by mimicking the bone niche behavior. Piezoelectric biomaterials show significant potential for bone tissue engineering. Herein we try to have a comparative review on piezoelectric and non-piezoelectric biomaterials used in bone tissue engineering, classified them, and discussed their effects on implanted cells and manufacturing techniques. Especially, Polyvinylidene fluoride (PVDF) and its composites are the most practically used piezoelectric biomaterials for bone regeneration. PVDF and its composites have been summarized and discussed to repair damaged bone tissues.
Collapse
Affiliation(s)
- Ali Samadi
- Department of Polymer Engineering, Faculty of Engineering, Urmia University, Urmia, Iran
| | | | - Amin Safari
- Faculty of Polymer Engineering, Sahand University of Technology, Tabriz, Iran
| | - Maryam Jouyandeh
- Center of Excellent in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Mahmood Barani
- Medical Mycology and Bacteriology Research Center, Kerman University of Medical Sciences, Kerman 7616913555, Iran
| | - Narendra Pal Singh Chauhan
- Department of Chemistry, Faculty of Science, Bhupal Nobles' University, Udaipur 313002, Rajasthan, India
| | - Elias Ghaleh Golab
- Department of Petroleum Engineering, Omidiyeh Branch, Islamic Azad University, Iran
| | - Payam Zarrintaj
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, USA
| | - Saptarshi Kar
- College of Engineering and Technology, American University of the Middle East, Kuwait
| | - Farzad Seidi
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
| | - Aleksander Hejna
- Department of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12 80-233, Gdańsk, Poland
| | - Mohammad Reza Saeb
- Department of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12 80-233, Gdańsk, Poland
| |
Collapse
|
32
|
Patranabish S, Dhawan S, Haridas V, Sinha A. Designer Peptide-PVDF Composite Films for High Performance Energy Harvesting. Macromol Rapid Commun 2022; 43:e2200493. [PMID: 35866581 DOI: 10.1002/marc.202200493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 07/14/2022] [Indexed: 11/10/2022]
Abstract
Polymers and peptides have recently been considered as promising materials for piezoelectric energy harvesting because of their biocompatibility and enormous design possibility. However, achieving significant output voltages while meeting environmental safety requirements, low-cost and easy fabrication remains a major challenge. Herein, we have fabricated a lipidated pseudopeptide incorporated poly(vinylidene fluoride) (PVDF) composite films. Adding lipidated pseudopeptide (BLHA) increases the electroactive phase content, reaching the maximum for the 2 wt% composite film. The composite film containing 2 wt% BLHA manifests the highest dielectric constant and remnant polarization (Pr ), among others. A piezoelectric energy harvesting device fabricated with this film generates open-circuit output voltages up to 23 V, five times amplified output compared to pure PVDF. To the best of our knowledge, this material is superior among the peptide-based piezoelectric energy harvesters reported in the literature. The device is flexible, durable, low-cost, and sensitive to high and low pressures. It can power up multiple LCD panels when pressed with a finger. The non-covalent interaction between BLHA and PVDF is the reason behind the composites' improved piezoelectric response. Density functional theory (DFT) calculations also support this notion. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Sourav Patranabish
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi, 110016, India
| | - Sameer Dhawan
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi, 110016, India
| | - V Haridas
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi, 110016, India
| | - Aloka Sinha
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi, 110016, India
| |
Collapse
|
33
|
Huang Y, Cadet ER, King MW, Cole JH. Comparison of the mechanical properties and anchoring performance of polyvinylidene fluoride and polypropylene barbed sutures for tendon repair. J Biomed Mater Res B Appl Biomater 2022; 110:2258-2265. [PMID: 35674273 PMCID: PMC9546200 DOI: 10.1002/jbm.b.35074] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 03/16/2022] [Accepted: 04/18/2022] [Indexed: 11/24/2022]
Abstract
Polyvinylidene fluoride (PVDF) has been considered as an alternative suture material to replace polypropylene (PP) due to its superior biocompatibility and mechanical properties, but it has never been examined for use in barbed sutures, particularly for tendon repair. This study fabricated size 2–0 PVDF and PP bidirectional barbed sutures and compared their mechanical properties and anchoring performance in patellar tendons. The mechanical properties were evaluated via tensile testing, and the anchoring performance of the barbed sutures was assessed by a tendon suture pullout test. Sixty porcine patellar tendons were harvested, transected to mimic a full‐thickness injury, and repaired using a cross‐locked cruciate suturing technique. The ultimate tensile force was 60% higher for the PVDF barbed sutures (22.4 ± 2.1 N) than for the PP barbed sutures (14.0 ± 1.7 N). The maximum pullout force was 35% higher for PVDF barbed sutures (70.8 ± 7.8 N) than for PP barbed sutures (52.4 ± 5.8 N). The force needed to form a 2‐mm gap, indicative of repair failure, was similar between the PVDF (29.2 ± 5.0 N) and PP (25.6 ± 3.1 N) barbed sutures, but both were greater than the 2‐mm‐gap forces for non‐barbed sutures of the same size. In this study, PVDF barbed sutures provided better mechanical properties and improved tissue anchoring performance compared to the barbed PP sutures for porcine patellar tendon repair, demonstrating that PVDF monofilament sutures can be barbed and used effectively for tendon repair.
Collapse
Affiliation(s)
- Yihan Huang
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina, USA
| | - Edwin R Cadet
- Raleigh Orthopaedic Clinic, Raleigh, North Carolina, USA.,Department of Orthopaedics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Martin W King
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina, USA.,College of Textiles, Donghua University, Shanghai, China
| | - Jacqueline H Cole
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina, USA
| |
Collapse
|
34
|
Liu Y, Liu Z, Gao J, Wu M, Lou X, Hu Y, Li Y, Zhong L. High Energy Density and Temperature Stability in PVDF/PMMA via In Situ Polymerization Blending. Front Chem 2022; 10:902487. [PMID: 35665066 PMCID: PMC9161359 DOI: 10.3389/fchem.2022.902487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 04/19/2022] [Indexed: 11/18/2022] Open
Abstract
Dielectrics with improved energy density have long-standing demand for miniature and lightweight energy storage capacitors for electrical and electronic systems. Recently, polyvinylidene fluoride (PVDF)-based ferroelectric polymers have shown attractive energy storage performance, such as high dielectric permittivity and high breakdown strength, and are regarded as one of the most promising candidates. However, the non-negligible energy loss and inferior temperature stability of PVDF-based polymers deteriorated the energy storage performance or even the thermal runaway, which could be ascribed to vulnerable amorphous regions at elevated temperatures. Herein, a new strategy was proposed to achieve high energy density and high temperature stability simultaneously of PVDF/PMMA blends by in situ polymerization. The rigidity of the amorphous region was ideally strengthened by in situ polymerization of methyl methacrylate (MMA) monomers in a PVDF matrix to obtain PVDF/PMMA blends. The atomic force microscopic study of the microstructure of etched films showed the ultra-homogenous distribution of PMMA with high glass transition temperature in the PVDF matrix. Consequently, the temperature variation was remarkably decreased, while the high polarization response was maintained. Accordingly, the high energy density of ∼8 J/cm3 with ∼80% efficiency was achieved between 30 and 90 °C in PVDF/PMMA films with 39–62% PMMA content, outperforming most of the dielectric polymers. Our work could provide a general solution to substantially optimize the temperature stability of dielectric polymers for energy storage applications and other associated functions.
Collapse
Affiliation(s)
- Yongbin Liu
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, China
| | - Zhengwei Liu
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, China
| | - Jinghui Gao
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, China
| | - Ming Wu
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, China
| | - Xiaojie Lou
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
| | - Yanhua Hu
- Department of Chemical Engineering, Ordos Institute of Technology, Ordos, China
| | - Yong Li
- Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, China
| | - Lisheng Zhong
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, China
| |
Collapse
|
35
|
Wang C, Qin M, Yi Z, Deng H, Wang J, Sun Y, Luo G, Shen Q. Oxidation Mechanism of Core-Shell Structured Al@PVDF Powders Synthesized by Solvent/Non-Solvent Method. Materials (Basel) 2022; 15:ma15093036. [PMID: 35591371 PMCID: PMC9101485 DOI: 10.3390/ma15093036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/12/2022] [Accepted: 04/17/2022] [Indexed: 02/07/2023]
Abstract
Micron-sized aluminum (Al) powders are extensively added to energy-containing materials to enhance the overall reactivity of the materials. However, low oxidation efficiency and energy release limit the practical application of Al powders. Polyvinylidene fluoride (PVDF), the most common fluoropolymer, can easily react with Al to form aluminum fluoride (AlF3), thus promoting the oxidation of Al powders. In this paper, core-shell structured Al@PVDF powders were synthesized by solvent/non-solvent method. Thermal analysis results show that the weight and exothermic enthalpy of Al@PVDF powders are 166.10% and 11,976 J/g, which are superior to pure Al powders (140.06%, 6560 J/g). A detailed description of the oxidation mechanisms involved is provided. Furthermore, constant volume pressure results indicate that Al@PVDF powders have outstanding pressure output ability in the environment of 3 MPa oxygen. The study provides a valuable reference for the application of Al powders in energetic materials.
Collapse
Affiliation(s)
- Chuanbin Wang
- State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430062, China; (C.W.); (M.Q.); (Z.Y.); (H.D.); (J.W.); (G.L.); (Q.S.)
| | - Mei Qin
- State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430062, China; (C.W.); (M.Q.); (Z.Y.); (H.D.); (J.W.); (G.L.); (Q.S.)
| | - Zhuoran Yi
- State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430062, China; (C.W.); (M.Q.); (Z.Y.); (H.D.); (J.W.); (G.L.); (Q.S.)
| | - Haoyuan Deng
- State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430062, China; (C.W.); (M.Q.); (Z.Y.); (H.D.); (J.W.); (G.L.); (Q.S.)
| | - Junjie Wang
- State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430062, China; (C.W.); (M.Q.); (Z.Y.); (H.D.); (J.W.); (G.L.); (Q.S.)
| | - Yi Sun
- State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430062, China; (C.W.); (M.Q.); (Z.Y.); (H.D.); (J.W.); (G.L.); (Q.S.)
- Correspondence:
| | - Guoqiang Luo
- State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430062, China; (C.W.); (M.Q.); (Z.Y.); (H.D.); (J.W.); (G.L.); (Q.S.)
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou 521000, China
| | - Qiang Shen
- State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430062, China; (C.W.); (M.Q.); (Z.Y.); (H.D.); (J.W.); (G.L.); (Q.S.)
| |
Collapse
|
36
|
Dmitrieva ES, Anokhina TS, Novitsky EG, Volkov VV, Borisov IL, Volkov AV. Polymeric Membranes for Oil-Water Separation: A Review. Polymers (Basel) 2022; 14:polym14050980. [PMID: 35267801 PMCID: PMC8912433 DOI: 10.3390/polym14050980] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/17/2022] [Accepted: 02/20/2022] [Indexed: 02/01/2023] Open
Abstract
This review is devoted to the application of bulk synthetic polymers such as polysulfone (PSf), polyethersulfone (PES), polyacrylonitrile (PAN), and polyvinylidene fluoride (PVDF) for the separation of oil-water emulsions. Due to the high hydrophobicity of the presented polymers and their tendency to be contaminated with water-oil emulsions, methods for the hydrophilization of membranes based on them were analyzed: the mixing of polymers, the introduction of inorganic additives, and surface modification. In addition, membranes based on natural hydrophilic materials (cellulose and its derivatives) are given as a comparison.
Collapse
Affiliation(s)
| | - Tatyana S. Anokhina
- Correspondence: ; Tel.: +7-(495)-647-59-27 (ext. 202); Fax: +7-(495)-633-85-20
| | | | | | | | | |
Collapse
|
37
|
Vu DL, Le CD, Ahn KK. Polyvinylidene Fluoride Surface Polarization Enhancement for Liquid-Solid Triboelectric Nanogenerator and Its Application. Polymers (Basel) 2022; 14:960. [PMID: 35267783 DOI: 10.3390/polym14050960] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 02/23/2022] [Accepted: 02/24/2022] [Indexed: 01/27/2023] Open
Abstract
Liquid-solid triboelectric nanogenerator (TENG) has been great attention as a promising electricity generation method for renewable energy sources and self-powered electronic devices. Thus, enhancing TENG performance is a critical issue to be concerned for both practical and industrial applications. Hence in this study, a high-output liquid-solid TENG is proposed using a polyvinylidene fluoride surface polarization enhancement (PSPE) for self-powered streamflow sensing, which shows many advantages, such as adapt to the sensor energy requirement, multiple parameters sensing at the same time, eliminate the influence of ion concentration. The TENG based on PSPE film has the maximum power density of 15.6 mW/m2, which is increased by about 4.7 times compared to commercial PVDF-based TENG. This could be attributed to the increase of the dielectric constant and hydrophobic property of the PVDF film after the surface polarization enhancement process. Furthermore, the PSPE-TENG-driven sensor can simultaneously monitor both the physical and chemical parameters of the streamflow with high sensitivity and minimum error detection, which proves that the PSPE-TENG has enormous potential applications in self-powered streamflow sensing.
Collapse
|
38
|
Moon CH, Yasmeen S, Park K, Gaiji H, Chung C, Kim H, Moon HS, Choi JW, Lee HBR. Icephobic Coating through a Self-Formed Superhydrophobic Surface Using a Polymer and Microsized Particles. ACS Appl Mater Interfaces 2022; 14:3334-3343. [PMID: 34981919 DOI: 10.1021/acsami.1c22404] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Icephobic coatings have been extensively studied for decades to overcome the potential damage associated with ice formation in various devices that are operated under harsh weather conditions. Superhydrophobic surface coatings have been applied for icephobic coating applications owing to their low surface energy. In this study, an icephobic coating of a self-formed superhydrophobic surface using polydimethylsiloxane (PDMS) and SiO2 powder was investigated. The effect of superhydrophobicity on icephobicity was determined by varying the experimental parameters. Polyvinylidene fluoride (PVDF) was added to the PDMS solution to improve the mechanical properties of the icephobic layer. The PDMS-PVDF solution also showed a self-formation behavior into a superhydrophobic surface. In addition, the icephobicity and mechanical properties of the PDMS-PVDF mixture coating improved because of the multilevel nanostructure formed by physical and chemical interactions between the mixture and SiO2 powder. We believe that the proposed approach will be a suitable candidate for various practical applications of icephobicity and a model system to understand the correlation between superhydrophobicity and icephobicity.
Collapse
Affiliation(s)
- Chan Hui Moon
- Department of Materials Science & Engineering, Incheon National University, Incheon 22012, South Korea
| | - Sumaira Yasmeen
- Department of Materials Science & Engineering, Incheon National University, Incheon 22012, South Korea
| | - Kiho Park
- School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, South Korea
| | - Houda Gaiji
- Department of Materials Science & Engineering, Incheon National University, Incheon 22012, South Korea
| | - Changhyun Chung
- Office of Technology Development & Service, Korea Polar Research Institute, Incheon 21990, South Korea
| | - Hyoungkwon Kim
- Office of Technology Development & Service, Korea Polar Research Institute, Incheon 21990, South Korea
| | - Hyoung-Seok Moon
- Energy Plant R&D Group, Korea Institute of Industrial Technology, Busan 31056, South Korea
| | - Jang Wook Choi
- School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, South Korea
| | - Han-Bo-Ram Lee
- Department of Materials Science & Engineering, Incheon National University, Incheon 22012, South Korea
| |
Collapse
|
39
|
Zhao Q, Liu X, Veldhuis S, Zhitomirsky I. Versatile Strategy for Electrophoretic Deposition of Polyvinylidene Fluoride-Metal Oxide Nanocomposites. Materials (Basel) 2021; 14:7902. [PMID: 34947495 DOI: 10.3390/ma14247902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 12/10/2021] [Accepted: 12/17/2021] [Indexed: 12/03/2022]
Abstract
Polyvinylidene fluoride (PVDF) is an advanced functional polymer which exhibits excellent chemical and thermal stability, and good mechanical, piezoelectric and ferroelectic properties. This work opens a new strategy for the fabrication of nanocomposites, combining the functional properties of PVDF and advanced inorganic nanomaterials. Electrophoretic deposition (EPD) has been developed for the fabrication of films containing PVDF and nanoparticles of TiO2, MnO2 and NiFe2O4. An important finding was the feasibility of EPD of electrically neutral PVDF and inorganic nanoparticles using caffeic acid (CA) and catechol violet (CV) as co-dispersants. The experiments revealed strong adsorption of CA and CV on PVDF and inorganic nanoparticles, which involved different mechanisms and facilitated particle dispersion, charging and deposition. The analysis of the deposition yield data, chemical structure of the dispersants and the microstructure and composition of the films provided an insight into the adsorption and dispersion mechanisms and the influence of deposition conditions on the deposition rate, film microstructure and composition. PVDF films provided the corrosion protection of stainless steel. Overcoming the limitations of other techniques, this investigation demonstrates a conceptually new approach for the fabrication of PVDF-NiFe2O4 films, which showed superparamagnetic properties. The approach developed in this investigation offers versatile strategies for the EPD of advanced organic-inorganic nanocomposites.
Collapse
|
40
|
Ge Y, Xiao X, Yao G, Yuan S, Zhang L, Zhou W. Dual Interface Protection for High Performance and Excellent Long-Term Stability of Organic Solar Cells. ACS Appl Mater Interfaces 2021; 13:57664-57672. [PMID: 34843202 DOI: 10.1021/acsami.1c15792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Stability is still the main barrier to the commercial application of organic solar cells (OSCs), although the maximal power conversion efficiency (PCE) value has exceeded 19%. The encapsulation technique is an effective and vital way to guarantee the long-term stabilities of OSCs, but it can only avoid the penetration of water and oxygen from the environment. Herein, we introduced a structure that provides dual interface protection by using commercially available and chemically stable polyvinylidene fluoride (PVDF) as the cathode interface protection layer working as the cathode interlayer (CIL) and poly(styrene-comethyl-methacrylate) (PS-r-PMMA) as the anode interface protection layer between the poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonate) (PEDOT:PSS) and the active layer. With this structure, both the migration of impurities caused by degradation of the interfacial layer and the infiltration of oxygen and water in the air can be prevented. PVDF can effectively provide optimal electron transfer by improving the surface potential of active layers and lowering the work function of the Al electrode. PS-r-PMMA can improve the hydrophobicity of PEDOT:PSS and induce optimized phase separation, facilitating charge transfer. After storage in an air environment with a humidity of approximately 60% for 3600 h, the device based on the PM6:IT-4F blend film with dual interface protection showed a decrease in its PCE value from 13.43 to 10.90%, retaining 81.2% of its original PCE value, in contrast to the sharp decrease in the PCE value from 13.66 to 0.74% of the device without dual interface protection. The dual interface protection design could also be useful in the high-performance PM6:Y6 system, which shows a champion PCE of 15.39% and shows potential for the effective fabrication of stable OSCs in the future.
Collapse
Affiliation(s)
- Yansong Ge
- School of Material Science and Engineering, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| | - Xinyu Xiao
- School of Material Science and Engineering, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| | - Ge Yao
- School of Material Science and Engineering, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| | - Shuaishuai Yuan
- Key Lab of Biobased Polymer Materials of Shandong Provincial Education Department, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
| | - Lin Zhang
- Hunan Key Laboratory for Super Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, China
| | - Weihua Zhou
- School of Material Science and Engineering, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| |
Collapse
|
41
|
Vesel A, Zaplotnik R, Primc G, Mozetič M, Katan T, Kargl R, Mohan T, Kleinschek KS. Non-Equilibrium Plasma Methods for Tailoring Surface Properties of Polyvinylidene Fluoride: Review and Challenges. Polymers (Basel) 2021; 13:4243. [PMID: 34883744 DOI: 10.3390/polym13234243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 12/01/2022] Open
Abstract
Modification and functionalization of polymer surface properties is desired in numerous applications, and a standard technique is a treatment with non-equilibrium gaseous plasma. Fluorinated polymers exhibit specific properties and are regarded as difficult to functionalize with polar functional groups. Plasma methods for functionalization of polyvinylidene fluoride (PVDF) are reviewed and different mechanisms involved in the surface modification are presented and explained by the interaction of various reactive species and far ultraviolet radiation. Most authors used argon plasma but reported various results. The discrepancy between the reported results is explained by peculiarities of the experimental systems and illustrated by three mechanisms. More versatile reaction mechanisms were reported by authors who used oxygen plasma for surface modification of PVDF, while plasma sustained in other gases was rarely used. The results reported by various authors are analyzed, and correlations are drawn where feasible. The processing parameters reported by different authors were the gas pressure and purity, the discharge configuration and power, while the surface finish was predominantly determined by X-ray photoelectron spectroscopy (XPS) and static water contact angle (WCA). A reasonably good correlation was found between the surface wettability as probed by WCA and the oxygen concentration as probed by XPS, but there is hardly any correlation between the discharge parameters and the wettability.
Collapse
|
42
|
Xu Q, Ji X, Tian J, Jin X, Wu L. Inner Surface Hydrophilic Modification of PVDF Membrane with Tea Polyphenols/Silica Composite Coating. Polymers (Basel) 2021; 13:polym13234186. [PMID: 34883689 PMCID: PMC8659430 DOI: 10.3390/polym13234186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/24/2021] [Accepted: 11/24/2021] [Indexed: 11/21/2022] Open
Abstract
The use of Polyvinylidene fluoride (PVDF) membranes is constrained in wastewater treatment because of their hydrophobic nature. Therefore, a large number of researchers have been working on the hydrophilic modification of their surfaces. In this work, a superhydrophilic tea polyphenols/silica composite coating was developed by a one-step process. The composite coating can achieve not only superhydrophilic modification of the surface, but also the inner surface of the porous PVDF membrane, which endows the modified membrane with excellent water permeability. The modified membrane possesses ultrahigh water flux (15,353 L·m−2·h−1). Besides this, the modified membrane can realize a highly efficient separation of oil/water emulsions (above 96%).
Collapse
Affiliation(s)
- Qiang Xu
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (Q.X.); (X.J.); (J.T.)
| | - Xiaoli Ji
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (Q.X.); (X.J.); (J.T.)
| | - Jiaying Tian
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (Q.X.); (X.J.); (J.T.)
| | - Xiaogang Jin
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (Q.X.); (X.J.); (J.T.)
- Correspondence: (X.J.); (L.W.)
| | - Lili Wu
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (Q.X.); (X.J.); (J.T.)
- Advanced Engineering Technology Research Institute of Zhongshan City, Wuhan University of Technology, Xiangxing Road 6, Zhongshan 528400, China
- Correspondence: (X.J.); (L.W.)
| |
Collapse
|
43
|
Purwanto M, Kusuma NC, Sudrajat MA, Jaafar J, Nasir AM, Aziz MHA, Othman MHD, Rahman MA, Raharjo Y, Widiastuti N. Seawater Desalination by Modified Membrane Distillation: Effect of Hydrophilic Surface Modifying Macromolecules Addition into PVDF Hollow Fiber Membrane. Membranes (Basel) 2021; 11:924. [PMID: 34940425 PMCID: PMC8708951 DOI: 10.3390/membranes11120924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/18/2021] [Accepted: 11/19/2021] [Indexed: 11/25/2022]
Abstract
Hollow fiber membranes of polyvinylidene fluoride (PVDF) were prepared by incorporating varying concentrations of hydrophilic surface-modifying macromolecules (LSMM) and a constant amount of polyethylene glycol (PEG) additives. The membranes were fabricated by the dry-wet spinning technique. The prepared hollow fiber membranes were dip-coated by hydrophobic surface-modifying macromolecules (BSMM) as the final step fabrication. The additives combination is aimed to produce hollow fiber membranes with high flux permeation and high salt rejection in the matter of seawater desalination application. This study prepares hollow fiber membranes from the formulation of 18 wt. % of PVDF mixed with 5 wt. % of PEG and 3, 4, and 5 wt. % of LSMM. The membranes are then dip-coated with 1 wt. % of BSMM. The effect of LSMM loading on hydrophobicity, morphology, average pore size, surface porosity, and membrane performance is investigated. Coating modification on LSMM membranes showed an increase in contact angle up to 57% of pure, unmodified PVDF/PEG membranes, which made the fabricated membranes at least passable when hydrophobicity was considered as one main characteristic. Furthermore, The PVDF/PEG/4LSMM-BSMM membrane exhibits 161 °C of melting point as characterized by the DSC. This value indicates an improvement of thermal behavior shows so as the fabricated membranes are desirable for membrane distillation operation conditions range. Based on the results, it can be concluded that PVDF/PEG membranes with the use of LSMM and BSMM combination could enhance the permeate flux up to 81.32 kg·m-2·h-1 at the maximum, with stable salt rejection around 99.9%, and these are found to be potential for seawater desalination application.
Collapse
Affiliation(s)
- Mochammad Purwanto
- Department of Chemical Engineering, Institut Teknologi Kalimantan, Balikpapan 76127, Indonesia; (M.P.); (N.C.K.); (M.A.S.)
| | - Nindita Cahya Kusuma
- Department of Chemical Engineering, Institut Teknologi Kalimantan, Balikpapan 76127, Indonesia; (M.P.); (N.C.K.); (M.A.S.)
| | - Ma’rup Ali Sudrajat
- Department of Chemical Engineering, Institut Teknologi Kalimantan, Balikpapan 76127, Indonesia; (M.P.); (N.C.K.); (M.A.S.)
| | - Juhana Jaafar
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, Skudai 81310, Malaysia; (A.M.N.); (M.H.A.A.); (M.H.D.O.); (M.A.R.)
| | - Atikah Mohd Nasir
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, Skudai 81310, Malaysia; (A.M.N.); (M.H.A.A.); (M.H.D.O.); (M.A.R.)
| | - Mohd Haiqal Abd Aziz
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, Skudai 81310, Malaysia; (A.M.N.); (M.H.A.A.); (M.H.D.O.); (M.A.R.)
| | - Mohd Hafiz Dzarfan Othman
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, Skudai 81310, Malaysia; (A.M.N.); (M.H.A.A.); (M.H.D.O.); (M.A.R.)
| | - Mukhlis A Rahman
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, Skudai 81310, Malaysia; (A.M.N.); (M.H.A.A.); (M.H.D.O.); (M.A.R.)
| | - Yanuardi Raharjo
- Membrane Science and Technology Research Group, Chemistry Department, Faculty of Science and Technology, Universitas Airlangga, Surabaya 60115, Indonesia;
| | - Nurul Widiastuti
- Department of Chemistry, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia;
| |
Collapse
|
44
|
Kang KW, Choi CW, Jin JW. A Wet-Spinning Process for Producing Carbon Nanotube/ Polyvinylidene Fluoride Fibers Having Highly Consistent Electrical and Mechanical Properties. Polymers (Basel) 2021; 13:polym13224048. [PMID: 34833347 PMCID: PMC8619640 DOI: 10.3390/polym13224048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 11/18/2021] [Accepted: 11/19/2021] [Indexed: 11/30/2022] Open
Abstract
Studies of polymer/carbon nanotube (CNT) fibers typically focus on optimizing the overall properties, and the effects of structural variation on these properties are ignored. Thus, we investigated the longitudinal variation in the properties of CNT/polyvinylidene fluoride (CNT/PVDF) fibers prepared by wet spinning a solution of multi-walled nanotubes, PVDF, and dimethylacetamide. To this end, materials for the CNT/PVDF fiber were selected, and a dope solution was prepared using MWNT, PVDF, and dimethylacetamide (DMAc). To consider the process parameters that would affect the performance of the CNT/PVDF fiber during the wet-spinning process using the dope solution, the initial conditions for wet spinning were selected, including bath concentration, bath temperature, drying temperature, and elongation, and the CNT/PVDF fiber was spun under the corresponding conditions. Additionally, three performance stabilization processes were proposed to improve the initial conditions for wet spinning and manufacturing the fiber. Lastly, to confirm the reliability of the CNT/PVDF fiber in all sections, tensile strength, electrical conductivity, and cross-sectional images were analyzed for the 30 m, 60 m, and 90 m sections of the fiber, and the reliability of the wet-spinning process was verified.
Collapse
Affiliation(s)
- Ki-Weon Kang
- Department of Mechanical Engineering, Kunsan National University, Kunsan 54150, Korea;
| | - Chan-Woong Choi
- Strategy Planning Team, Jeonbuk Institute of Automotive Convergence Technology, Kunsan 54158, Korea;
| | - Ji-Won Jin
- Green Mobility R&D Center, Jeonbuk Institute of Automotive Convergence Technology, Kunsan 54158, Korea
- Correspondence:
| |
Collapse
|
45
|
Xia J, Qin Y, Wei X, Li L, Li M, Kong X, Xiong S, Cai T, Dai W, Lin CT, Jiang N, Fang S, Yi J, Yu J. Enhanced Thermal Conductivity of Polymer Composite by Adding Fishbone-like Silicon Carbide. Nanomaterials (Basel) 2021; 11:2891. [PMID: 34835656 PMCID: PMC8620080 DOI: 10.3390/nano11112891] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/23/2021] [Accepted: 10/24/2021] [Indexed: 11/16/2022]
Abstract
The rapid development of chip technology has all put forward higher requirements for highly thermally conductive materials. In this work, a new type of material of Fishbone-like silicon carbide (SiC) material was used as the filler in a polyvinylidene fluoride (PVDF) matrix. The silicon carbide/polyvinylidene fluoride (SiC/PVDF) composites were successfully prepared with different loading by a simple mixing method. The thermal conductivity of SiC/PVDF composite reached 0.92 W m-1 K-1, which is 470% higher than that of pure polymer. The results show that using the filler with a new structure to construct thermal conductivity networks is an effective way to improve the thermal conductivity of PVDF. This work provides a new idea for the further application in the field of electronic packaging.
Collapse
Affiliation(s)
- Juncheng Xia
- School of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China;
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
| | - Yue Qin
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
| | - Xianzhe Wei
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
| | - Linhong Li
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Maohua Li
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
| | - Xiangdong Kong
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
| | - Shaoyang Xiong
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
| | - Tao Cai
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wen Dai
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Cheng-Te Lin
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Nan Jiang
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shuangquan Fang
- School of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China;
| | - Jian Yi
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jinhong Yu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (Y.Q.); (X.W.); (L.L.); (M.L.); (X.K.); (S.X.); (T.C.); (W.D.); (C.-T.L.); (N.J.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
46
|
Gryshkov O, AL Halabi F, Kuhn AI, Leal-Marin S, Freund LJ, Förthmann M, Meier N, Barker SA, Haastert-Talini K, Glasmacher B. PVDF and P(VDF-TrFE) Electrospun Scaffolds for Nerve Graft Engineering: A Comparative Study on Piezoelectric and Structural Properties, and In Vitro Biocompatibility. Int J Mol Sci 2021; 22:11373. [PMID: 34768804 PMCID: PMC8583857 DOI: 10.3390/ijms222111373] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/14/2021] [Accepted: 10/16/2021] [Indexed: 12/19/2022] Open
Abstract
Polyvinylidene fluoride (PVDF) and its copolymer with trifluoroethylene (P(VDF-TrFE)) are considered as promising biomaterials for supporting nerve regeneration because of their proven biocompatibility and piezoelectric properties that could stimulate cell ingrowth due to their electrical activity upon mechanical deformation. For the first time, this study reports on the comparative analysis of PVDF and P(VDF-TrFE) electrospun scaffolds in terms of structural and piezoelectric properties as well as their in vitro performance. A dynamic impact test machine was developed, validated, and utilised, to evaluate the generation of an electrical voltage upon the application of an impact load (varying load magnitude and frequency) onto the electrospun PVDF (15-20 wt%) and P(VDF-TrFE) (10-20 wt%) scaffolds. The cytotoxicity and in vitro performance of the scaffolds was evaluated with neonatal rat (nrSCs) and adult human Schwann cells (ahSCs). The neurite outgrowth behaviour from sensory rat dorsal root ganglion neurons cultured on the scaffolds was analysed qualitatively. The results showed (i) a significant increase of the β-phase content in the PVDF after electrospinning as well as a zeta potential similar to P(VDF-TrFE), (ii) a non-constant behaviour of the longitudinal piezoelectric strain constant d33, depending on the load and the load frequency, and (iii) biocompatibility with cultured Schwann cells and guiding properties for sensory neurite outgrowth. In summary, the electrospun PVDF-based scaffolds, representing piezoelectric activity, can be considered as promising materials for the development of artificial nerve conduits for the peripheral nerve injury repair.
Collapse
Affiliation(s)
- Oleksandr Gryshkov
- Institute for Multiphase Processes, Leibniz University Hannover, An der Universität 1, Building 8143, 30823 Garbsen, Germany; (A.I.K.); (S.L.-M.); (S.-A.B.); (B.G.)
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625 Hannover, Germany
| | - Fedaa AL Halabi
- Institute for Multiphase Processes, Leibniz University Hannover, An der Universität 1, Building 8143, 30823 Garbsen, Germany; (A.I.K.); (S.L.-M.); (S.-A.B.); (B.G.)
| | - Antonia Isabel Kuhn
- Institute for Multiphase Processes, Leibniz University Hannover, An der Universität 1, Building 8143, 30823 Garbsen, Germany; (A.I.K.); (S.L.-M.); (S.-A.B.); (B.G.)
| | - Sara Leal-Marin
- Institute for Multiphase Processes, Leibniz University Hannover, An der Universität 1, Building 8143, 30823 Garbsen, Germany; (A.I.K.); (S.L.-M.); (S.-A.B.); (B.G.)
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625 Hannover, Germany
| | - Lena Julie Freund
- Institute of Neuroanatomy and Cell Biology, Hannover Medical School, Centre for Systems Neuroscience (ZSN) Hannover, 30559 Hannover, Germany; (L.J.F.); (M.F.); (K.H.-T.)
| | - Maria Förthmann
- Institute of Neuroanatomy and Cell Biology, Hannover Medical School, Centre for Systems Neuroscience (ZSN) Hannover, 30559 Hannover, Germany; (L.J.F.); (M.F.); (K.H.-T.)
| | - Nils Meier
- Institute for Technical Chemistry, Braunschweig University of Technology, Hagenring 30, 38106 Braunschweig, Germany;
| | - Sven-Alexander Barker
- Institute for Multiphase Processes, Leibniz University Hannover, An der Universität 1, Building 8143, 30823 Garbsen, Germany; (A.I.K.); (S.L.-M.); (S.-A.B.); (B.G.)
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625 Hannover, Germany
| | - Kirsten Haastert-Talini
- Institute of Neuroanatomy and Cell Biology, Hannover Medical School, Centre for Systems Neuroscience (ZSN) Hannover, 30559 Hannover, Germany; (L.J.F.); (M.F.); (K.H.-T.)
| | - Birgit Glasmacher
- Institute for Multiphase Processes, Leibniz University Hannover, An der Universität 1, Building 8143, 30823 Garbsen, Germany; (A.I.K.); (S.L.-M.); (S.-A.B.); (B.G.)
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625 Hannover, Germany
| |
Collapse
|
47
|
Chae J, Lim T, Cheng H, Hu J, Kim S, Jung W. Graphene Oxide and Carbon Nanotubes-Based Polyvinylidene Fluoride Membrane for Highly Increased Water Treatment. Nanomaterials (Basel) 2021; 11:nano11102498. [PMID: 34684938 PMCID: PMC8539680 DOI: 10.3390/nano11102498] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/15/2021] [Accepted: 09/22/2021] [Indexed: 11/29/2022]
Abstract
As contaminated water increases due to environmental pollution, the need for excellent water treatment is increased, and several studies have reported the polyvinylidene fluoride (PVDF)-based water treatment membranes. However, the PVDF membrane has several problems such as low filtration performance, fouling resistance, and difficulty in precisely controlling the morphology of the pores and hydrophilicity. Therefore, we newly produced a water treatment PVDF membrane containing graphene oxide (GO) and multi-walled carbon nanotubes (MWCNTs) to improve the filtration performance. Surface properties of the fabricated membrane such as morphology, and size of pores, hydrophilicity, and water flux of the membrane were investigated. Additionally, the performance of these membrane filters was evaluated for free residual chlorine, turbidity, chromaticity, magnesium, sulfate, and particulates class 1 according to drinking water management act criteria, respectively. A performance improvement of at least 108.37% was observed compared to the Pure PVDF filter module and anti-fouling effects due to the functional groups of GO and MWCNTs. These results reveal that proposed membrane can accelerate the development of various water filtration applications.
Collapse
Affiliation(s)
- Jungryeong Chae
- School of Mechanical Engineering, Chungnam National University, Daejeon 34134, Korea; (J.C.); (T.L.); (H.C.); (J.H.)
| | - Taeuk Lim
- School of Mechanical Engineering, Chungnam National University, Daejeon 34134, Korea; (J.C.); (T.L.); (H.C.); (J.H.)
| | - Hao Cheng
- School of Mechanical Engineering, Chungnam National University, Daejeon 34134, Korea; (J.C.); (T.L.); (H.C.); (J.H.)
| | - Jie Hu
- School of Mechanical Engineering, Chungnam National University, Daejeon 34134, Korea; (J.C.); (T.L.); (H.C.); (J.H.)
| | - Sunghoon Kim
- Department of Electronics Convergence Engineering, Wonkwang University, Iksan 54538, Korea
- Correspondence: (S.K.); (W.J.); Tel.: +82-42-821-6647 (W.J.)
| | - Wonsuk Jung
- School of Mechanical Engineering, Chungnam National University, Daejeon 34134, Korea; (J.C.); (T.L.); (H.C.); (J.H.)
- Correspondence: (S.K.); (W.J.); Tel.: +82-42-821-6647 (W.J.)
| |
Collapse
|
48
|
Ansari S, Golbus JR, Tiba MH, McCracken B, Wang L, Aaronson KD, Ward KR, Najarian K, Oldham KR. Detection of Low Cardiac Index using a Polyvinylidene Fluoride-Based Wearable Ring and Convolutional Neural Networks. IEEE Sens J 2021; 21:14281-14289. [PMID: 34504397 PMCID: PMC8423366 DOI: 10.1109/jsen.2020.3022273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This study investigated the use of a wearable ring made of polyvinylidene fluoride film to identify a low cardiac index (≤2 L/min). The waveform generated by the ring contains patterns that may be indicative of low blood pressure and/or high vascular resistance, both of which are markers of a low cardiac index. In particular, the waveform contains reflection waves whose timing and amplitude are correlated with pulse travel time and vascular resistance, respectively. Hence, the pattern of the waveform is expected to vary in response to changes in blood pressure and vascular resistance. By analyzing the morphology of the waveform, our aim was to create a tool to identify patients with low cardiac index. This was done using a convolutional neural network which was trained on data from animal models. The model was then tested on waveforms that were collected from patients undergoing pulmonary artery catheterization. The results indicate high accuracy in classifying patients with a low cardiac index, achieving an area under the receiver operating characteristics and precision-recall curves of 0.88 and 0.71, respectively.
Collapse
Affiliation(s)
- Sardar Ansari
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MI, 48109 USA
| | - Jessica R Golbus
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109 USA
| | - Mohamad H Tiba
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MI, 48109 USA
| | - Brendan McCracken
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MI, 48109 USA
| | - Lu Wang
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109 USA
| | - Keith D Aaronson
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109 USA
| | - Kevin R Ward
- Department of Emergency Medicine and the Biomedical Engineering Department, University of Michigan, Ann Arbor, MI, 48109 USA
| | - Kayvan Najarian
- Department of Computational Medicine and Bioinformatics, the Department of Emergency Medicine and the Electrical Engineering and Computer Science Department, University of Michigan, Ann Arbor, MI, 48109 USA
| | - Kenn R Oldham
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109 USA
| |
Collapse
|
49
|
Ji SY, Jung HB, Kim MK, Lim JH, Kim JY, Ryu J, Jeong DY. Enhanced Energy Storage Performance of Polymer/Ceramic/Metal Composites by Increase of Thermal Conductivity and Coulomb-Blockade Effect. ACS Appl Mater Interfaces 2021; 13:27343-27352. [PMID: 34081442 DOI: 10.1021/acsami.1c01177] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Polymer-based dielectrics have attracted considerable attention for a wide range of applications as energy storage devices with high power. However, high loss from low thermal conductivity (K) and leaky current may limit their practical utilization greatly. To overcome these issues, two-dimensional hexagonal boron nitride (h-BN) modified with polydopamine (PDA) and metal palladium nanoparticles (h-BN@PDA@Pd NPs) are introduced into a poly(vinylidene fluoride-hexafluoropropylene) P(VDF-HFP) copolymer matrix. The PDA coating improves the compatibility between the ceramic h-BN filler and the polymer matrix. Contrary to the general idea, the metallic Pd NPs enhance the breakdown strength of the polymer nanocomposites through the Coulomb-blockade effect. The nanocomposite film filled with 6 vol % h-BN@PDA@Pd NPs exhibits significantly improved recoverable energy density (Urec) of 58.6 J cm-3, which is increasedby 496% compared to pure P(VDF-HFP) film, maintaining an efficiency of 65%, even under a high voltage of 500 MV m-1. The in-plane thermal conductivity of the nanocomposites was improved from 0.21 to 1.02 W m-1 K-1 with increasing ceramic h-BN content. This study suggests that a dielectric polymer with surface-engineered ceramic h-BN fillers through a Coulomb-blockade effect of metal Pd NPs might be a promising strategy for high energy storage devices.
Collapse
Affiliation(s)
- Sung-Yub Ji
- Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Han-Bo Jung
- Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Min-Kyu Kim
- Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Ji-Ho Lim
- Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Jin-Young Kim
- Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Jungho Ryu
- School of Materials Science and Engineering, Institute of Materials Technology, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Dae-Yong Jeong
- Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea
| |
Collapse
|
50
|
Danila O. Polyvinylidene Fluoride-Based Metasurface for High-Quality Active Switching and Spectrum Shaping in the Terahertz G-Band. Polymers (Basel) 2021; 13:polym13111860. [PMID: 34205117 PMCID: PMC8199944 DOI: 10.3390/polym13111860] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 05/20/2021] [Accepted: 05/28/2021] [Indexed: 11/16/2022] Open
Abstract
We report theoretical investigations performed in the terahertz G-band, in the 228–232 GHz spectral window for a piezoelectrically-responsive ring-cone element metasurface composed of polyvinylidene fluoride (PVDF)/Silicon and PVDF/Silica glass. The choosing of this spectral window is motivated by a multitude of applications in terahertz detection and terahertz imaging, that commonly make use of this band. The uniqueness of the envisioned architecture resides in the combination between the readily-available polyvinylidene fluoride polymer and silicon/silica glass substrates, together with the introduction of an extra degree of freedom, in the form of a ring-cone architecture, and the active control of the geometric sizes through the longitudinal piezoelectric effect exhibited by the polymer. The spectral response of the metasurface is dependent on the combination between the polymer elements and the substrate, and ranges from near-zero absorption switching to a resonant behavior and significant absorption. The interaction between the electromagnetic field and the polymer-based metasurface also modifies the phase of the reflected and transmitted waves over a full 2π range, permitting complete control of the electric field polarization. Moreover, we take advantage of the longitudinal piezoelectric effect of PVDF and analyze the spectrum shaping capability of the polymer-based metasurface. Our analysis highlights the capability of the proposed architecture to achieve complete electric field polarization control, near-zero optical switching and resonant behavior, depending on the geometries and sizes of the architecture elements resulting from construction considerations and from the externally applied voltages through the piezoelectric effect.
Collapse
Affiliation(s)
- Octavian Danila
- Physics Department, 'Politehnica' University of Bucharest, 060042 Bucharest, Romania
| |
Collapse
|