1
|
Electrospun highly corrosion-resistant polystyrene–nickel oxide superhydrophobic nanocomposite coating. J APPL ELECTROCHEM 2021. [DOI: 10.1007/s10800-021-01603-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AbstractA key challenge in producing superhydrophobic coatings (SHC) is to tailor the surface morphology on the micro-nanometer scale. In this work, a feasible and straightforward route was employed to manufacture polystyrene/nickel oxide (PSN) nanocomposite superhydrophobic coatings on aluminum alloys to mitigate their corrosion in a saline environment. Different techniques were employed to explore the influence of the addition of NiO nanoparticles to the as-prepared coatings. PSN-2 composite with ~ 4.3 wt% of NiO exhibited the highest water contact angle (WCA) of 155° ± 2 and contact angle hysteresis (CAH) of 5°.
Graphic abstract
EIS Nyquist plots of 3 g of electrospun polystyrene coatings (a) without and with (b) 0.1, (c) 0.15, and (d) 0.2 g of NiO.
Collapse
|
2
|
Bagrov D, Perunova S, Pavlova E, Klinov D. Wetting of electrospun nylon-11 fibers and mats. RSC Adv 2021; 11:11373-11379. [PMID: 35423606 PMCID: PMC8695991 DOI: 10.1039/d0ra10788c] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/10/2021] [Indexed: 01/18/2023] Open
Abstract
Wetting of electrospun mats plays a huge role in tissue engineering and filtration applications. However, it is challenging to trace the interrelation between the wetting of individual nano-sized fibers and the macroscopic electrospun mat. Here we measured the wetting of different nylon-11 samples – solution-cast films, electrospun fibers deposited onto a substrate, and free-standing mats. With electrospun nylon-11 on aluminium foil, we traced the dependence of the wetting contact angle on the fibers' surface density (substrate coverage). When the coverage was low, the contact angle increased almost linearly with it. At ∼17–20% coverage, the contact angle achieved its maximum of 124 ± 7°, which matched the contact angle of a non-woven electrospun mat, 126 ± 2°. Our results highlight the importance of the outermost layer of fibers for the wetting of electrospun mats. When the surface density of electrospun nylon-11 fibers on aluminium increases, it causes a two-stage change in the wetting behaviour.![]()
Collapse
Affiliation(s)
- Dmitry Bagrov
- Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency 1a Malaya Pirogovskaya Street 119435 Moscow Russian Federation .,Lomonosov Moscow State University, Faculty of Biology Leninskie Gory 1-12 119234 Moscow Russian Federation
| | - Svetlana Perunova
- National University of Science and Technology MISiS Leninskiy Prospect 4 Moscow 119049 Russian Federation
| | - Elizaveta Pavlova
- Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency 1a Malaya Pirogovskaya Street 119435 Moscow Russian Federation .,Moscow Institute of Physics and Technology 9 Institutsky Per., Dolgoprudny 141700 Moscow Region Russian Federation
| | - Dmitry Klinov
- Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency 1a Malaya Pirogovskaya Street 119435 Moscow Russian Federation
| |
Collapse
|
3
|
Mirzaei R, Bahadori M, Kardanpour R, Rafiei S, Tangestaninejad S, Moghadam M, Mirkhani V, Mohammadpoor-Baltork I, Mirazimi SE. Preparation and characterization of nanofibrous metal-organic frameworks as efficient catalysts for the synthesis of cyclic carbonates in solvent-free conditions. Dalton Trans 2021; 50:10567-10579. [PMID: 34263897 DOI: 10.1039/d1dt01336j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Environmental concerns, particularly global warming, represent serious threats to public health globally. Metal-organic frameworks (MOFs) are innovative materials with prominent features such as ultrahigh surface area, high porosity and tunable cavities, which make them unique materials both in adsorption of carbon dioxide and catalysis. The design of new nanocomposites by using metal-organic frameworks as building materials has received broad attention recently. Here, nanocrystals of two unique MOF structures (UiO-66 and ZIF-67) were incorporated into electrospun polyvinyl alcohol (PVA) and polystyrene (PS) fibers (noted as MOFibers) by an ex situ method, to transform non-toxic, abundant, economical and renewable CO2 gas to cyclic carbonates in a solvent-free medium. In order to improve the composites' performance, different electrospinning parameters, including applied voltage, flow rate, collection distance, PVA and PS weight fraction in solution, and MOF weight fraction relative to the polymer, were intensively investigated. The synthesized samples were characterized by multiple techniques, such as FTIR, XRD, SEM, UV-vis and TGA, as well as N2 and CO2 adsorption measurement. It was found that all of the composites show properties combining the advantages of MOFs and polymers, such as thermal, chemical, and mechanical stability, structural flexibility, lightweight, adsorption performance and catalytic properties. Additionally, all systems were environment-friendly and the PVA/MOF fibers were easily separated and recycled for consecutive cycles.
Collapse
Affiliation(s)
- Razieh Mirzaei
- Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran.
| | - Mehrnaz Bahadori
- Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran.
| | - Reihaneh Kardanpour
- Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran.
| | - Sara Rafiei
- Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran.
| | - Shahram Tangestaninejad
- Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran.
| | - Majid Moghadam
- Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran.
| | - Valiollah Mirkhani
- Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran.
| | - Iraj Mohammadpoor-Baltork
- Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran.
| | - Seyed Erfan Mirazimi
- Laboratory for Mechanical and Physical Properties of Solids, Central Laboratory of Isfahan University, Islamic Republic of Iran
| |
Collapse
|
4
|
Szewczyk PK, Stachewicz U. The impact of relative humidity on electrospun polymer fibers: From structural changes to fiber morphology. Adv Colloid Interface Sci 2020; 286:102315. [PMID: 33197707 DOI: 10.1016/j.cis.2020.102315] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 11/03/2020] [Accepted: 11/03/2020] [Indexed: 02/05/2023]
Abstract
Electrospinning is one of the most important methods used for the production of nanostructured materials. Electrospun nanofibers are used in a wide spectrum of applications such as drug delivery systems, filtration, fog harvesting, tissue engineering, smart textiles, flexible electronics, and more. Control of the manufacturing process is essential for further technology developments. In electrospinning, relative humidity is a crucial parameter that influences nearly all the properties of the collected fibers, such as morphology, mechanical properties, liquid retention, wetting properties, phase composition, chain conformation, and surface potential. Relative humidity is a determining component of a reliable process as it governs charge dissipation and solvent evaporation. This review summarizes the electrospinning process and its applications, phase separation processes, and impact of relative humidity on the properties of polymer fibers. We investigated relative humidity effects on both hydrophilic and hydrophobic polymers using over 20 polymers and hundreds of solvent systems. Most importantly, we underlined the indisputable importance of relative humidity in process repeatability and demonstrated its impact on almost all aspects of fiber production from a solution droplet to an electrospun network.
Collapse
|
5
|
Xie J, Zhang H, An S, Qian X, Cheng H, Zhang F, Li X. Role of a "surface wettability switch" in inter-fiber bonding properties. RSC Adv 2018; 8:3081-3089. [PMID: 35541166 PMCID: PMC9077703 DOI: 10.1039/c7ra12307h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 01/08/2018] [Indexed: 11/21/2022] Open
Abstract
The fiber surface wettability is one of the most important lignocellulosic fiber characteristics affecting the inter-fiber bonding properties of final bio-products. In this study, the surface wettability (evaluated by the surface free energy, surface lignin and surface charge) of mechanically refined fibers and the bonding properties of the fiber matrix (handsheets) were measured and correlated to each other. The results showed that the fiber surface charge increased from 48.38 mmol kg-1 to 60.38 mmol kg-1 and the surface lignin decreased from 87.1% to 77.5% during the fiber mechanical treatment, leading to the improvement of the fiber surface free energy from 46.63 mJ m-2 to 54.45 mJ m-2. As a result, the bonding strength index increased from 2.60 N m g-1 to 9.73 N m g-1 without significant loss of bulk properties. In a word, the fiber surface wettability could be adjusted to facilitate the inter-fiber bonding properties of the paper or paperboard products using lignin-rich fibers as raw materials.
Collapse
Affiliation(s)
- Jinglei Xie
- Tianjin Key Lab of Pulp & Paper, Tianjin University of Science & Technology Tianjin 300457 China +86-22-6060-2510 +86-22-6060-2199
| | - Hongjie Zhang
- Tianjin Key Lab of Pulp & Paper, Tianjin University of Science & Technology Tianjin 300457 China +86-22-6060-2510 +86-22-6060-2199.,Hebei Huatai Paper Industry Co. Ltd., Huatai Group Zhaoxian 051530 China.,Shandong Huatai Paper Industry Co. Ltd., Huatai Group Dongying 257335 China
| | - Shuai An
- Tianjin Key Lab of Pulp & Paper, Tianjin University of Science & Technology Tianjin 300457 China +86-22-6060-2510 +86-22-6060-2199
| | - Xuejun Qian
- Hebei Huatai Paper Industry Co. Ltd., Huatai Group Zhaoxian 051530 China
| | - Hongshun Cheng
- Hebei Huatai Paper Industry Co. Ltd., Huatai Group Zhaoxian 051530 China
| | - Fengshan Zhang
- Shandong Huatai Paper Industry Co. Ltd., Huatai Group Dongying 257335 China
| | - Xiaoliang Li
- Shandong Huatai Paper Industry Co. Ltd., Huatai Group Dongying 257335 China
| |
Collapse
|
6
|
Sundaran SP, C. R. R, A. S. Tailored design of polyurethane based fouling-tolerant nanofibrous membrane for water treatment. NEW J CHEM 2018. [DOI: 10.1039/c7nj03997b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyurethane (PU) nanofibers have gained attention due to their good mechanical properties and water resistance.
Collapse
Affiliation(s)
- Suja P. Sundaran
- Materials Research Laboratory
- Department of Chemistry
- National Institute of Technology Calicut
- Calicut-673601
- India
| | - Reshmi C. R.
- Materials Research Laboratory
- Department of Chemistry
- National Institute of Technology Calicut
- Calicut-673601
- India
| | - Sujith A.
- Materials Research Laboratory
- Department of Chemistry
- National Institute of Technology Calicut
- Calicut-673601
- India
| |
Collapse
|
7
|
Ahmed RM. Voltage effect on color, optical, and surface properties of fibers of PS/PES blends. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2017. [DOI: 10.1080/1023666x.2017.1404187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- R. M. Ahmed
- Physics Department, Faculty of Science, Zagazig University, Zagazig, Egypt
| |
Collapse
|
8
|
Peterson GW, Lu AX, Epps TH. Tuning the Morphology and Activity of Electrospun Polystyrene/UiO-66-NH 2 Metal-Organic Framework Composites to Enhance Chemical Warfare Agent Removal. ACS APPLIED MATERIALS & INTERFACES 2017; 9:32248-32254. [PMID: 28829565 DOI: 10.1021/acsami.7b09209] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This work investigates the processing-structure-activity relationships that ultimately facilitate the enhanced performance of UiO-66-NH2 metal-organic frameworks (MOFs) in electrospun polystyrene (PS) fibers for chemical warfare agent detoxification. Key electrospinning processing parameters including solvent type (dimethylformamide [DMF]) vs DMF/tetrahydrofuran [THF]), PS weight fraction in solution, and MOF weight fraction relative to PS were varied to optimize MOF incorporation into the fibers and ultimately improve composite performance. It was found that composites spun from pure DMF generally resulted in MOF crystal deposition on the surface of the fibers, while composites spun from DMF/THF typically led to MOF crystal deposition within the fibers. For cases in which the MOF was incorporated on the periphery of the fibers, the composites generally demonstrated better gas uptake (e.g., nitrogen, chlorine) because of enhanced access to the MOF pores. Additionally, increasing both the polymer and MOF weight percentages in the electrospun solutions resulted in larger diameter fibers, with polymer concentration having a more pronounced effect on fiber size; however, these larger fibers were generally less efficient at gas separations. Overall, exploring the electrospinning parameter space resulted in composites that outperformed previously reported materials for the detoxification of the chemical warfare agent, soman. The data and strategies herein thus provide guiding principles applicable to the design of future systems for protection and separations as well as a wide range of environmental remediation applications.
Collapse
Affiliation(s)
- Gregory W Peterson
- Edgewood Chemical Biological Center , 5183 Blackhawk Road, Aberdeen Proving Ground, Maryland 21010-5424, United States
| | - Annie X Lu
- Edgewood Chemical Biological Center , 5183 Blackhawk Road, Aberdeen Proving Ground, Maryland 21010-5424, United States
- Defense Threat Reduction Agency , 8725 John J. Kingman Road, Stop 6201, Fort Belvoir, Virginia 22060-6201, United States
| | | |
Collapse
|
9
|
Fei H, Liu X, Li Z, Feng W. Synthesis of manganese coordination polymer microspheres for lithium-ion batteries with good cycling performance. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.06.088] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
10
|
Abstract
The inkjet printing of graphene is a cost-effective, and versatile deposition technique for both transparent and non-transparent conductive films. Printing graphene on paper is aimed at low-end, high-volume applications, i.e., in electromagnetic shielding, photovoltaics or, e.g., as a replacement for the metal in antennas of radio-frequency identification devices, thereby improving their recyclability and biocompatibility. Here, we present a comparison of two graphene inks, one prepared by the solubilization of expanded graphite in the presence of a surface active polymer, and the other by covalent graphene functionalization followed by redispersion in a solvent but without a surfactant. The non-oxidative functionalization of graphite in the form of a donor-type graphite intercalation compound was carried out by a Birch-type alkylation, where graphene can be viewed as a macrocarbanion. To increase the amount of functionalization we employed a graphite precursor with a high edge to bulk carbon ratio, thus, allowing us to achieve up to six weight percent of functional groups. The functionalized graphene can be readily dispersed at concentrations of up to 3 mg ml(-1) in non-toxic organic solvents, and is colloidally stable for more than 2 months. The two inks are readily inkjet printable with good to satisfactory spreading. Analysis of the sheet resistance of the deposited films demonstrated that the inks based on expanded graphite outperform the functionalized graphene inks, possibly due to the significantly larger graphene sheet size in the former, which minimizes the number of sheet-to-sheet contacts along the conductive path. We found that the sheet resistance of printed large-area films decreased with an increase of the number of printed layers. Conductivity levels reached approximately 1-2 kΩ □(-1) for 15 printing passes, which roughly equals a film thickness of 800 nm for expanded graphite based inks, and 2 MΩ □(-1) for 15 printing passes of functionalized graphene, having a film thickness of 900 nm. Our results show that ink preparation and inkjet printing of graphene-based inks is simple and efficient, and therefore has a high potential to compete with other conductive ink formulations for large-area printing of conductive films.
Collapse
Affiliation(s)
- Kirill Arapov
- Laboratory of Materials and Interface Chemistry, Dept. of Chemical Engineering and Chemistry, Eindhoven University of Technology, Den Dolech 2, 5612AZ, Eindhoven, The Netherlands.
| | | | | | | |
Collapse
|