利用辐射接枝技术简便制备基于乙烯-乙烯醇共聚物的两性离子交换膜：其在钒氧化还原液流电池中应用的初步研究
Facile Preparation of EVOH-Based Amphoteric Ion Exchange Membrane Using Radiation Grafting Technique: A Preliminary Investigation on Its Application for Vanadium Redox Flow Battery.
作者信息
Xie Kangjun, Dong Zhen, Wang Yicheng, Qi Wei, Zhai Maolin, Zhao Long
机构信息
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
出版信息
Polymers (Basel). 2019 May 10;11(5):843. doi: 10.3390/polym11050843.
A novel amphoteric ion exchange membrane (AIEM) was successfully prepared by one-step radiation grafting of sodium styrene sulfonate (SSS) and dimethylaminoethyl methacrylate (DMAEMA) onto ethylene-vinylalcohol copolymer (EVOH) powder and sequent transferring into film by casting method. Fourier transform infrared spectrometry (FT-IR), thermal gravimetric analyzer (TGA) and elemental analysis testified SSS and DMAEMA were successfully grafted onto EVOH. The ion exchange capacity, water uptake and proton conductivity of the resulting AIEM increased with grafting yield (GY). At the GY of 40.9%, the permeability of vanadium ions of AIEM was 3.98 × 10 cm min, which was better than Nafion117 membrane. Furthermore, the cost of this AIEM is much lower than that of Nafion117 membrane. This work provided a low cost and simple method for fabrication of the ion exchange membrane for vanadium redox flow battery (VRFB). Meanwhile, it also provided a new direction for the application of EVOH.
通过将苯乙烯磺酸钠（SSS）和甲基丙烯酸二甲氨基乙酯（DMAEMA）一步辐射接枝到乙烯-乙烯醇共聚物（EVOH）粉末上，并随后通过流延法制成薄膜，成功制备了一种新型两性离子交换膜（AIEM）。傅里叶变换红外光谱（FT-IR）、热重分析仪（TGA）和元素分析证明SSS和DMAEMA已成功接枝到EVOH上。所得AIEM的离子交换容量、吸水率和质子传导率随接枝率（GY）的增加而提高。在接枝率为40.9%时，AIEM对钒离子的渗透率为3.98×10 cm/min，优于Nafion117膜。此外，这种AIEM的成本远低于Nafion117膜。这项工作为制备用于全钒氧化还原液流电池（VRFB）的离子交换膜提供了一种低成本且简单的方法。同时，也为EVOH的应用提供了新的方向。
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