Radiolytic preparation of PFA-g-PVBSA membranes as a polymer electrolyte membrane

Geng, Fang; Hwang, Mi-Lim; Sohn, Joon-Yong; Nho, Young Chang; Shin, Junhwa

doi:10.1016/j.nimb.2011.12.002

Cited by 10 publications

(12 citation statements)

References 15 publications

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“…The grafting technologies used in AEM formation include chemical grafting technique 63–67, ATRP technique 68–71, plasma grafting technique 72–74 and radiation grafting technique 75–84. The starting materials adopted in these techniques are usually powders except for that adopted in radiation grafting technique which are often films.…”

Section: Aems For Aemfcsmentioning

confidence: 99%

Anion‐Exchange Membranes for Fuel Cells: Synthesis Strategies, Properties and Perspectives

et al. 2015

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This review focuses on various synthesis strategies of anion‐exchange membranes (AEMs) for fuel cells, diverse methodologies of AEM‐forming, together with relationship between structures and properties. AEMs are discussed from seven categories, including (1) AEMs derived from Nafion precursors with sulfonyl fluoride groups, which display excellent stability and well‐developed morphologies that similar to Nafion, but has potentially high costs. (2) AEMs prepared by grafting technologies, such as chemical grafting technique, ATRP technique, plasma grafting technique and radiation grafting technique. (3) AEMs based on functionalized commercial polymers, including PVA, SEBS, CPP, PEEK, PES, PEI, PPO, and so on. (4) AEMs prepared by newly‐synthesized polymers, in which the most interesting approach is to synthesize alkaline multi‐block copolymers with enough long hydrophilic/hydrophobic blocks. (5) AEMs containing heterogeneous composition, which mainly prepared by blending and sol‐gel methods, reinforced or pore‐filling AEMs and IPN or s‐IPN. (6) AEMs with functional groups different from quaternary ammonium, which includes the studies of new type of AEMs with highly chemical stability in alkaline solution. (7) Hybrid membranes combining AEM with PEM, in which new configuration results in different performances. At last, conclusions and perspectives for the future researches of AEMs are presented.

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Section: Aems For Aemfcsmentioning

confidence: 99%

Anion‐Exchange Membranes for Fuel Cells: Synthesis Strategies, Properties and Perspectives

et al. 2015

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“…The former was attributed to SO 2 symmetric stretching from SO 3 Na of SSS units [ 27 ], and the latter was attributed to C=O stretching from COOH of AA units [ 28 ]. In the CMS-grafted side, the abovementioned two peaks were not observed; instead, the peak attributed to C–Cl stretching from CMS units was observed at 820 cm −1 [ 29 ]. These FT-IR spectra also support the clear separation of SSS + AA- and CMS-grafted layers.…”

Section: Resultsmentioning

confidence: 99%

Radiation-Induced Asymmetric Grafting of Different Monomers into Base Films to Prepare Novel Bipolar Membranes

Sawada

Maekawa

2021

Molecules

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We prepared novel bipolar membranes (BPMs) consisting of cation and anion exchange layers (CEL and AEL) using radiation-induced asymmetric graft polymerization (RIAGP). In this technique, graft polymers containing cation and anion exchange groups were introduced into a base film from each side. To create a clear CEL/AEL boundary, grafting reactions were performed from each surface side using two graft monomer solutions, which are immiscible in each other. Sodium p-styrenesulfonate (SSS) and acrylic acid (AA) in water were co-grafted from one side of the base ethylene-co-tetrafluoroethylene film, and chloromethyl styrene (CMS) in xylene was simultaneously grafted from the other side, and then the CMS units were quaternized to afford a BPM. The distinct SSS + AA- and CMS-grafted layers were formed owing to the immiscibility of hydrophilic SSS + AA and hydrophobic CMS monomer solutions. This is the first BPM with a clear CEL/AEL boundary prepared by RIAGP. However, in this BPM, the CEL was considerably thinner than the AEL, which may be a problem in practical applications. Then, by using different starting times of the first SSS+AA and second CMS grafting reactions, the CEL and AEL thicknesses was found to be controlled in RIAGP.

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“…Compared to PTFE, PFA not only maintained the advantages of PTFE but also acquired good melting processing properties, which was benefited from the introduction of PPVE to confine the PTFE crystallization. Unfortunately, the recent studies on PFA mainly focused on coating construction and grafting other polymers to achieve certain functions, few researchers specialized PFA in the field of membrane preparation, which may result in the PFA hardly achieve self‐worth 16–20 …”

Section: Introductionmentioning

confidence: 99%

Green preparation of thermal and solvent resistant poly (tetrafluoroethylene‐co‐perfluoropropylvinyl ether) hollow fiber membrane for organic solvent recycling

Chen

Shu

Xiao

et al. 2021

J of Applied Polymer Sci

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So far, the organic solvent recycling still has great challenges. Herein, the thermal and solvent resistant poly (tetrafluoroethylene‐co‐perfluoropropylvinyl ether) (PFA) hollow fiber membranes (TS‐PFA HFMs) were continuously designed by on‐line compound technique for organic solvent recycling. The experiment results indicated that the increased sintering temperature brought about the porous surface and loose internal cavity structures. Importantly, the membrane exhibited the excellent thermal resistance at 70°C working condition. Furthermore, part of the poly (vinyl alcohol) was retained in the membrane which was competent to create synergistic effects, and endowed the membrane with not only favorable elasticity but also remarkable hot water resistance. Finally, the excellent organic solvent recycling ability of the membrane was demonstrated in simulated non‐aqueous solvent dyeing system. Specifically, no organic solvents or other hazardous substances were used during the fabrication process, which can realize the green preparation of the membrane.

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Radiolytic preparation of PFA-g-PVBSA membranes as a polymer electrolyte membrane

Cited by 10 publications

References 15 publications

Anion‐Exchange Membranes for Fuel Cells: Synthesis Strategies, Properties and Perspectives

Anion‐Exchange Membranes for Fuel Cells: Synthesis Strategies, Properties and Perspectives

Radiation-Induced Asymmetric Grafting of Different Monomers into Base Films to Prepare Novel Bipolar Membranes

Green preparation of thermal and solvent resistant poly (tetrafluoroethylene‐co‐perfluoropropylvinyl ether) hollow fiber membrane for organic solvent recycling

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