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Kang H, Cheon M, Lee CH, Kim TH, Hong YT, Nam SY, Park CH. Mesoscale Simulation Based on the Dynamic Mean-Field Density Functional Method on Block-Copolymeric Ionomers for Polymer Electrolyte Membranes. MEMBRANES 2023; 13:258. [PMID: 36984645 PMCID: PMC10054894 DOI: 10.3390/membranes13030258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/16/2023] [Accepted: 02/18/2023] [Indexed: 06/18/2023]
Abstract
Block copolymers generally have peculiar morphological characteristics, such as strong phase separation. They have been actively applied to polymer electrolyte membranes for proton exchange membrane fuel cells (PEMFCs) to obtain well-defined hydrophilic regions and water channels as a proton pathway. Although molecular simulation tools are advantageous to investigate the mechanism of water channel formation based on the chemical structure and property relationships, classical molecular dynamics simulation has limitations regarding the model size and time scale, and these issues need to be addressed. In this study, we investigated the morphology of sulfonated block copolymers synthesized for PEM applications using a mesoscale simulation based on the dynamic mean-field density functional method, widely applied to investigate macroscopic systems such as polymer blends, micelles, and multi-block/grafting copolymers. Despite the similar solubility parameters of the monomers in our block-copolymer models, very different morphologies in our 3D mesoscale models were obtained. The model with sulfonated monomers, in which the number of sulfonic acid groups is twice that of the other model, showed better phase separation and water channel formation, despite the short length of its hydrophilic block. In conclusion, this unexpected behavior indicates that the role of water molecules is important in making PEM mesoscale models well-equilibrated in the mesoscale simulation, which results in the strong phase separation between hydrophilic and hydrophobic regions and the ensuing well-defined water channel. PEM synthesis supports the conclusion that using the sulfonated monomers with a high sulfonation degree (32.5 mS/cm) will be more effective than using the long hydrophilic block with a low sulfonation degree (25.2 mS/cm).
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Affiliation(s)
- Hoseong Kang
- Department of Energy Engineering, Future Convergence Technology Research Institute, Gyeongsang National University (GNU), Jinju 52725, Republic of Korea
| | - Muyeong Cheon
- Department of Energy Engineering, Future Convergence Technology Research Institute, Gyeongsang National University (GNU), Jinju 52725, Republic of Korea
| | - Chang Hyun Lee
- Energy Engineering Department, College of Engineering, Dankook University, Cheonan 31116, Republic of Korea
| | - Tae-Ho Kim
- Center for Membranes, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Young Taik Hong
- Center for Membranes, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Sang Yong Nam
- Department of Materials Engineering and Convergence Technology, Gyeongsang National University (GNU), Jinju 52725, Republic of Korea
| | - Chi Hoon Park
- Department of Energy Engineering, Future Convergence Technology Research Institute, Gyeongsang National University (GNU), Jinju 52725, Republic of Korea
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Shubhadarshinee L, Mohapatra P, Jali BR, Barick AK, Mohapatra P. Synthesis and characterization of a novel silver nanoparticles decorated functionalized single-walled carbon nanotubes nanohybrids embedded polyaniline ternary nanocomposites: thermal, dielectric, and sensing properties. POLYM-PLAST TECH MAT 2023. [DOI: 10.1080/25740881.2022.2101118] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lipsa Shubhadarshinee
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, India
| | - Pooja Mohapatra
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, India
| | - Bigyan Ranjan Jali
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, India
| | - Aruna Kumar Barick
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, India
| | - Priyaranjan Mohapatra
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, India
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Shajari S, Rajabian M, Kamkar M, Sudak LJ, Sundararaj U. A solution-processable and highly flexible conductor of a fluoroelastomer FKM and carbon nanotubes with tuned electrical conductivity and mechanical performance. SOFT MATTER 2022; 18:7537-7549. [PMID: 36148683 DOI: 10.1039/d2sm00838f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The use of fluoroelastomer nanocomposites for flexible electronics is increasing due to their high deformability and recoverability. Often, a high amount of conductive nanofillers and crosslinking agents is required to improve their mechanical performance, which unfavorably affects the electrical percolation threshold and conductivity due to dispersion issues. Herein, we developed a unique solution mixing (SM) technique by a fine-tuned formulation to obtain well-dispersed carbon nanotubes (CNTs) in fluoroelastomer FKM for both low and high CNT concentrations (0.2 phr and 3 phr). Effective nano-network formation was confirmed by transmission electron microscopy (TEM) and oscillatory shear rheological tests. Compared to the melt mixing (MM) process, the stretchability of neat FKM improves to 503% in the SM process versus 430% in the MM process. The electrical conductivity of the SM samples percolates at significantly lower filler concentrations (i.e., 0.35 phr in SM vs. 0.45 phr in MM) with a maximum value of 7 × 10-1 S cm-1 for 3 phr. Overall, the 2 phr CNT/FKM nanocomposite fabricated by SM exceeds those of carbon-based FKM conductors reported in the literature. The enhanced electrical and mechanical properties include an electrical conductivity of 3 × 10-1 S cm-1, a strain-to-failure of 300%, and a tensile strength at break of 12 MPa. This process is a promising approach for fabricating fluoroelastomer nanocomposites of a mechanically robust and stable stretchable conductor for various wearable electronic devices.
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Affiliation(s)
- Shaghayegh Shajari
- Center for Applied Polymer and Nanotechnology (CAPNA), Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada.
- Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Mahmoud Rajabian
- Center for Applied Polymer and Nanotechnology (CAPNA), Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada.
| | - Milad Kamkar
- Center for Applied Polymer and Nanotechnology (CAPNA), Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada.
| | - Les Jozef Sudak
- Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Uttandaraman Sundararaj
- Center for Applied Polymer and Nanotechnology (CAPNA), Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada.
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Li J, Zhang H, Yu M, Li Q, Zhang T, Xue Z, Sun H. Using Coarse-Grain MD to study the trade-off between surface area and mass transport in aqueous Li-O2 battery using functionalized CNT. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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5
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Synthesis of V2O5/Single-Walled Carbon Nanotubes Integrated into Nanostructured Composites as Cathode Materials in High Performance Lithium-Ion Batteries. ENERGIES 2022. [DOI: 10.3390/en15020552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Vanadium pentoxide (V2O5)-anchored single-walled carbon nanotube (SWCNT) composites have been developed through a simple sol–gel process, followed by hydrothermal treatment. The resulting material is suitable for use in flexible ultra-high capacity electrode applications for lithium-ion batteries. The unique combination of V2O5 with 0.2 wt.% of SWCNT offers a highly conductive three-dimensional network. This ultimately alleviates the low lithium-ion intercalation seen in V2O5 itself and facilitates vanadium redox reactions. The integration of SWCNTs into the layered structure of V2O5 leads to a high specific capacity of 390 mAhg−1 at 0.1 C between 1.8 to 3.8 V, which is close to the theoretical capacity of V2O5 (443 mAhg−1). In recent research, most of the V2O5 with carbonaceous materials shows higher specific capacity but limited cyclability and poor rate capability. In this work, good cyclability with only 0.3% per cycle degradation during 200 cycles and enhanced rate capability of 178 mAhg−1 at 10 C have been achieved. The excellent electrochemical kinetics during lithiation/delithiation is attributed to the chemical interaction of SWCNTs entrapped between layers of the V2O5 nanostructured network. Proper dispersion of SWCNTs into the V2O5 structure, and its resulting effects, have been validated by SEM, TEM, XPS, XRD, and electrical resistivity measurements. This innovative hybrid material offers a new direction for the large-scale production of high-performance cathode materials for advanced flexible and structural battery applications.
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Otero Navas I, Kamkar M, Arjmand M, Sundararaj U. Morphology Evolution, Molecular Simulation, Electrical Properties, and Rheology of Carbon Nanotube/Polypropylene/Polystyrene Blend Nanocomposites: Effect of Molecular Interaction between Styrene-Butadiene Block Copolymer and Carbon Nanotube. Polymers (Basel) 2021; 13:polym13020230. [PMID: 33440844 PMCID: PMC7827940 DOI: 10.3390/polym13020230] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/29/2020] [Accepted: 01/05/2021] [Indexed: 11/23/2022] Open
Abstract
This work studied the impact of three types of styrene-butadiene (SB and SBS) block copolymers on the morphology, electrical, and rheological properties of immiscible blends of polypropylene:polystyrene (PP:PS)/multi-walled carbon nanotubes (MWCNT) with a fixed blend ratio of 70:30 vol.%. The addition of block copolymers to PP:PS/MWCNT blend nanocomposites produced a decrease in the droplet size. MWCNTs, known to induce co-continuity in PP:PS blends, did not interfere with the copolymer migration to the interface and, thus, there was morphology refinement upon addition of the copolymers. Interestingly, the addition of the block copolymers decreased the electrical resistivity of the PP:PS/1.0 vol.% MWCNT system by 5 orders of magnitude (i.e., increase in electrical conductivity). This improvement was attributed to PS Droplets-PP-Copolymer-Micelle assemblies, which accumulated MWCNTs, and formed an integrated network for electrical conduction. Molecular simulation and solubility parameters were used to predict the MWCNT localization in the immiscible blend. The simulation results showed that diblock copolymers favorably interact with the nanotubes in comparison to the triblock copolymer, PP, and PS. However, the interaction between the copolymers and PP or PS is stronger than the interaction of the copolymers and MWCNTs. Hence, the addition of copolymer also changed the localization of MWCNT from PS to PS–PP–Micelles–Interface, as observed by TEM images. In addition, in the last step of this work, we investigated the effect of the addition of copolymers on inter- and intra-cycle viscoelastic behavior of the MWCNT incorporated polymer blends. It was found that addition of the copolymers not only affects the linear viscoelasticity (e.g., increase in the value of the storage modulus) but also dramatically impacts the nonlinear viscoelastic behavior under large deformations (e.g., higher distortion of Lissajous–Bowditch plots).]
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Affiliation(s)
- Ivonne Otero Navas
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (I.O.N.); (M.K.)
| | - Milad Kamkar
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (I.O.N.); (M.K.)
- School of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canada;
| | - Mohammad Arjmand
- School of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canada;
| | - Uttandaraman Sundararaj
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (I.O.N.); (M.K.)
- Correspondence:
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Bodik M, Jergel M, Majkova E, Siffalovic P. Langmuir films of low-dimensional nanomaterials. Adv Colloid Interface Sci 2020; 283:102239. [PMID: 32854017 DOI: 10.1016/j.cis.2020.102239] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 08/11/2020] [Accepted: 08/11/2020] [Indexed: 02/08/2023]
Abstract
A large number of low-dimensional nanomaterials having different shapes and being dispersible in solvents open a fundamental question if there is a universal deposition technique for the monolayer formation. A monolayer formation of various nanomaterials at the air-water interface, also known as a Langmuir film, is a well-established technique even for the large group of the recently developed low-dimensional nanomaterials. In this review, we cover the monolayer formation of the zero-dimensional, one-dimensional and two-dimensional nanomaterials. Thanks to the formation of a Langmuir layer at the thermodynamic equilibrium, by using a suitable nanomaterial dispersion and subphase, the monolayers can be formed from all kinds of materials, ranging from the graphene oxide to the semiconducting quantum dots. In this review, we will discuss the basic requirements for the successful formation of monolayers and summarize the recent scientific advances in the field of Langmuir films.
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Luo Y, Chen X, Wu S, Cao S, Luo Z, Shi Y. Molecular Dynamics Simulation Study on Two-Component Solubility Parameters of Carbon Nanotubes and Precisely Tailoring the Thermodynamic Compatibility between Carbon Nanotubes and Polymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9291-9305. [PMID: 32787072 DOI: 10.1021/acs.langmuir.0c01736] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Solubility parameters play an important role in predicting compatibility between components. The current study on solubility parameters of carbon materials (graphene, carbon nanotubes, and fullerene, etc.) is unsatisfactory and stagnant due to experimental limitations, especially the lack of a quantitative relationship between functional groups and solubility parameters. Fundamental understanding of the high-performance nanocomposites obtained by carbon material modification is scarce. Therefore, in the past, the trial and error method was often used for the modification of carbon materials, and no theory has been formed to guide the experiment. In this work, the effect of defects, size, and the number of walls on the Hildebrand solubility parameter (δT) of carbon nanotubes (CNTs) was investigated by molecular dynamics (MD) simulation. Besides, three-component Hansen solubility parameters (δD, δp, δH) were transformed into two-component solubility parameters (δvdW, δelec). The quantitative relation between functional groups and two-component solubility parameters of single-walled carbon nanotubes (SWCNTs) was then given. An important finding is that the δT and δvdW of SWCNTs first decrease, reach a minimum, and then increase with increasing grafting ratio. The thermodynamic compatibility between functionalized SWCNTs and six typical polymers was investigated by the Flory-Huggins mixing model. Two-component solubility parameters were proven to be able to effectively predict their compatibility. Importantly, we theoretically gave the optimum grafting ratio at which the compatibility between functionalized SWCNTs and polymers is the best. The functionalization principle of SWCNTs toward good compatibility between SWCNTs and polymers was also given. This study gives a new insight into the solubility parameters of functionalized SWCNTs and provides theoretical guidance for the preparation of high-performance SWCNTs/polymers composites.
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Affiliation(s)
- Yanlong Luo
- College of Science, Nanjing Forestry University, Nanjing 210037, P. R. China
- Institute of Polymer Materials, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Xianling Chen
- College of Science, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Sizhu Wu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Songyuan Cao
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 21009, P. R. China
| | - Zhenyang Luo
- College of Science, Nanjing Forestry University, Nanjing 210037, P. R. China
- Institute of Polymer Materials, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Yijun Shi
- Division of Machine Elements, Luleå University of Technology, 97187 Luleå, Sweden
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Sliozberg YR, Gair JL, Hsieh AJ. Dissipative particle dynamics simulation of microphase separation in polyurethane urea nanocomposites. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122339] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Li C, Fu X, Zhong W, Liu J. Dissipative Particle Dynamics Simulations of a Protein-Directed Self-Assembly of Nanoparticles. ACS OMEGA 2019; 4:10216-10224. [PMID: 31460113 PMCID: PMC6648767 DOI: 10.1021/acsomega.9b01078] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 05/31/2019] [Indexed: 06/10/2023]
Abstract
Design and fabrication of multifunctional porous structures play key roles in the development of high-performance energy storage devices. Our experiments demonstrated that nanostructured porous components, such as electrodes and interlayers, generated from the protein-directed self-assembly of nanoparticles can significantly improve the battery performances. The protein-directed assembly of nanoparticles in solution is a complex process involving the complicated interactions among proteins, particles, and solvent molecules. In this paper, we investigate the effects of coating proteins and specific solvent environments on the assembled porous structures. Comprehensive dissipative particle dynamics (DPD) simulations have been implemented to explore the molecular interactions and uncover the fundamental mechanisms in a gelatin-directed self-assembly of carbon black particles under different solvent conditions. Our simulations show that compact triple-strand "rod-like" structures are formed in water while loose curved "sheet-like" structures are formed in an acetic acid/water mixture. The structural difference is mainly due to the redistribution of the charges on the gelatin side chains under specific acid-solvent conditions. The strong and flexible "sheet-like" structures lead to a homogenous porous structure with high porosity and with large functionalized surfaces. Our simulations results can reasonably explain the experimental observations; this work demonstrates the great potential of DPD as a powerful tool in guiding future experimental design and optimization.
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Wang J, Cao C, Chen X, Ren S, Chen Y, Yu D, Chen X. Orientation and Dispersion Evolution of Carbon Nanotubes in Ultra High Molecular Weight Polyethylene Composites under Extensional-Shear Coupled Flow: A Dissipative Particle Dynamics Study. Polymers (Basel) 2019; 11:polym11010154. [PMID: 30960138 PMCID: PMC6401708 DOI: 10.3390/polym11010154] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 01/13/2019] [Accepted: 01/14/2019] [Indexed: 11/16/2022] Open
Abstract
The property of carbon nanotubes (CNTs)-based composites are significantly dependent on the orientation and dispersion evolution of CNTs in the polymer matrix. In this work, the dissipative particle dynamics (DPD) simulations are employed to discover the orientation and dispersion evolution of CNTs in ultra⁻high molecular weight polyethylene (UHMWPE) under extensional⁻shear coupled flow conditions for the first time. In this paper, we investigate the roles of the increasing extensional-shear coupled rate in morphology of CNTs/UHMWPE composites by varying CNTs concentration and observe that the system under consideration lies in the same evolution morphologies. When comparing our results for various morphologies, we notice that the orientation is affected more significantly by changing the extensional-shear coupled rates. A good alignment appears with an increase of extensional-shear coupled rates, which transform it into ordered morphology. In addition, a higher extensional-shear coupled rate does not necessarily contribute to better dispersion even though CNTs concentration varies, as shown by the mean square displacement (MSD) and the relative concentration distribution functions of CNTs in CNTs/UHMWPE composites.
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Affiliation(s)
- Junxia Wang
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education and Key Laboratory of High Performance Polymer⁻based Composites of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Changlin Cao
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education and Key Laboratory of High Performance Polymer⁻based Composites of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Xiaochuan Chen
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education and Key Laboratory of High Performance Polymer⁻based Composites of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Shijie Ren
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Yu Chen
- Beijing Huateng Hightech Co.Ltd, Beijing 10084, China.
| | - Dingshan Yu
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education and Key Laboratory of High Performance Polymer⁻based Composites of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Xudong Chen
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education and Key Laboratory of High Performance Polymer⁻based Composites of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
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13
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Gooneie A, Hufenus R. Hybrid Carbon Nanoparticles in Polymer Matrix for Efficient Connected Networks: Self-Assembly and Continuous Pathways. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00585] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Ali Gooneie
- Laboratory of Advanced Fibers, Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland
| | - Rudolf Hufenus
- Laboratory of Advanced Fibers, Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland
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14
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Gooneie A, Holzer C. Reinforced local heterogeneities in interfacial tension distribution in polymer blends by incorporating carbon nanotubes. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.07.077] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Gooneie A, Sapkota J, Shirole A, Holzer C. Length controlled kinetics of self-assembly of bidisperse nanotubes/nanorods in polymers. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.05.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Park CH, Tocci E, Fontananova E, Bahattab MA, Aljlil SA, Drioli E. Mixed matrix membranes containing functionalized multiwalled carbon nanotubes: Mesoscale simulation and experimental approach for optimizing dispersion. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.04.011] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Fontananova E, Bahattab MA, Aljlil SA, Alowairdy M, Rinaldi G, Vuono D, Nagy JB, Drioli E, Di Profio G. From hydrophobic to hydrophilic polyvinylidenefluoride (PVDF) membranes by gaining new insight into material's properties. RSC Adv 2015. [DOI: 10.1039/c5ra08388e] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
From hydrophobic to hydrophilic PVDF membranes by a combination of functionalization by blending chemical additives and selection of manufacturing procedure.
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Affiliation(s)
- E. Fontananova
- Institute on Membrane Technology of the National Research Council of Italy (ITM-CNR)
- University of Calabria
- 87036 Rende (CS)
- Italy
| | - M. A. Bahattab
- King Abdulaziz City for Science and Technology (KACST)
- Riyadh-11442
- Saudi Arabia
| | - S. A. Aljlil
- King Abdulaziz City for Science and Technology (KACST)
- Riyadh-11442
- Saudi Arabia
| | - M. Alowairdy
- King Abdulaziz City for Science and Technology (KACST)
- Riyadh-11442
- Saudi Arabia
| | - G. Rinaldi
- Department of Environmental and Chemical Engineering (DIATIC)
- University of Calabria
- 87036 Rende (CS)
- Italy
| | - D. Vuono
- Department of Environmental and Chemical Engineering (DIATIC)
- University of Calabria
- 87036 Rende (CS)
- Italy
| | - J. B. Nagy
- Department of Environmental and Chemical Engineering (DIATIC)
- University of Calabria
- 87036 Rende (CS)
- Italy
| | - E. Drioli
- Institute on Membrane Technology of the National Research Council of Italy (ITM-CNR)
- University of Calabria
- 87036 Rende (CS)
- Italy
- Department of Environmental and Chemical Engineering (DIATIC)
| | - G. Di Profio
- Institute on Membrane Technology of the National Research Council of Italy (ITM-CNR)
- University of Calabria
- 87036 Rende (CS)
- Italy
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Staudinger U, Krause B, Steinbach C, Pötschke P, Voit B. Dispersability of multiwalled carbon nanotubes in polycarbonate-chloroform solutions. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.10.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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19
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Semler MR, Harris JM, Hobbie EK. Wrinkling and folding of nanotube-polymer bilayers. J Chem Phys 2014; 141:044901. [PMID: 25084950 DOI: 10.1063/1.4887775] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The influence of a polymer capping layer on the deformation of purified single-wall carbon nanotube (SWCNT) networks is analyzed through the wrinkling of compressed SWCNT-polymer bilayers on polydimethylsiloxane. The films exhibit both wrinkling and folding under compression and we extract the elastoplastic response using conventional two-plate buckling schemes. The formation of a diffuse interpenetrating nanotube-polymer interface has a dramatic effect on the nanotube layer modulus for both metallic and semiconducting species. In contrast to the usual percolation exhibited by the pure SWCNT films, the capped films show a crossover from "composite" behavior (the modulus of the SWCNT film is enhanced by the polymer) to "plasticized" behavior (the modulus of the SWCNT film is reduced by the polymer) as the SWCNT film thickness increases. For almost all thicknesses, however, the polymer enhances the yield strain of the nanotube network. Conductivity measurements on identical films suggest that the polymer has a modest effect on charge transport, which we interpret as a strain-induced polymer penetration of interfacial nanotube contacts. We use scaling, Flory-Huggins theory, and independently determined nanotube-nanotube and nanotube-polymer Hamaker constants to model the response.
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Affiliation(s)
- Matthew R Semler
- Department of Physics, North Dakota State University, Fargo, North Dakota 58108, USA
| | - John M Harris
- Department of Physics, North Dakota State University, Fargo, North Dakota 58108, USA
| | - Erik K Hobbie
- Department of Physics, Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108, USA
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Lee K, Park CR. Effects of chirality and diameter of single-walled carbon nanotubes on their structural stability and solubility parameters. RSC Adv 2014. [DOI: 10.1039/c4ra05212a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Lim HJ, Lee K, Cho YS, Kim YS, Kim T, Park CR. Experimental consideration of the Hansen solubility parameters of as-produced multi-walled carbon nanotubes by inverse gas chromatography. Phys Chem Chem Phys 2014; 16:17466-72. [DOI: 10.1039/c4cp02319f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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KARUNWI OLUKAYODE, BALDWIN CASSIDY, GRIESHEIMER GISELA, SARUPRIA SAPNA, GUISEPPI-ELIE ANTHONY. MOLECULAR DYNAMICS SIMULATIONS OF PEPTIDE–SWCNT INTERACTIONS RELATED TO ENZYME CONJUGATES FOR BIOSENSORS AND BIOFUEL CELLS. ACTA ACUST UNITED AC 2014. [DOI: 10.1142/s1793984413430071] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
With the demonstration of direct electron transfer between the redox active prosthetic group, flavin adenine dinucleotide (FAD), of glucose oxidase (GOx) and single-walled carbon nanotubes (SWCNT), there has been growing interest in the fabrication of CNT-enzyme supramolecular constructs that control the placement of SWCNTs within the tunneling distance of co-factors for enhanced electron transfer efficiency in generation-3 biosensors and advanced biofuel cells. These conjugate systems raise a series of questions such as: which peptide sequences within the enzymes have high affinity for the SWCNTs? And, are these high affinity sequences likely to be in the vicinity of the redox-active co-factor to allow for direct electron transfer? Phage display has recently been used to identify specific peptide sequences that have high affinity for SWCNTs. Molecular dynamics simulations were performed to study the interactions of five discrete peptides with (16,0) SWCNT in explicit water as well as with graphene. From the progression of the radius of gyration, Rg, the peptides studied were concertedly adsorbed to both the SWCNT and graphene. Peptide properties calculated using individual amino acid values, such as hydrophobicity indices, did not correlate with the observed adsorption behavior as quantified by Rg, indicating that the adsorption behavior of the peptide was not based on the individual amino acid residues. However, the Rg values, reflective of the physicochemical embrace of the surface (SWCNT or graphene) had a strong positive correlation with the solubility parameter, indicating concerted, cooperative interaction of peptide segments with the materials. The end residues appear to dominate the progression of adsorption regardless of character. Sequences identified by phage display share some homology with key enzymes (GOx, lactate oxidase and laccase) used in biosensors and enzyme-based biofuel cells. These analogous sequences appear to be buried deep within the shell of fully folded proteins and as such are expected to be close to the redox-active prosthetic group.
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Affiliation(s)
- OLUKAYODE KARUNWI
- Center for Bioelectronics, Biosensors and Biochips (C3B), Clemson University Advanced Materials Center, 100 Technology Drive, Anderson, South Carolina 29625, USA
- Department of Bioengineering, Clemson University, Clemson, SC 29634, USA
| | - CASSIDY BALDWIN
- SC Governor's School for Science & Mathematics, Hartsville, SC 29550, USA
| | - GISELA GRIESHEIMER
- SC Governor's School for Science & Mathematics, Hartsville, SC 29550, USA
| | - SAPNA SARUPRIA
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, SC 29634, USA
| | - ANTHONY GUISEPPI-ELIE
- Center for Bioelectronics, Biosensors and Biochips (C3B), Clemson University Advanced Materials Center, 100 Technology Drive, Anderson, South Carolina 29625, USA
- Department of Bioengineering, Department of Chemical and Biomolecular Engineering, Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA
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