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首页> 外文期刊>RSC Advances >Facile synthesis and properties of a cation exchange membrane with bifunctional groups prepared by pre-irradiation graft copolymerization
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Facile synthesis and properties of a cation exchange membrane with bifunctional groups prepared by pre-irradiation graft copolymerization

机译：预辐照接枝共聚制备具有双官能团的阳离子交换膜的简便合成与性能

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摘要

A new type of a cation exchange membrane named ETFE- g -poly(AA- co -SSS) with bifunctional groups was synthesized by a one-step method. Its preparation by an electron beam-induced pre-irradiation grafting method and the effects of reaction temperature, monomer concentration, pH value of the grafting solution, storage time and temperature of the irradiated poly(ethylene- alt -tetrafluoroethylene) (ETFE) films on the grafting yield were studied. A total concentration of 2?mol L ~(?1) of monomers was found to be beneficial for acrylic acid (AA) and sodium styrene sulfonate (SSS) co-grafting onto the ETFE films. Infrared spectroscopic analysis of the grafted membrane confirmed the existence of sulfonate and carboxylic acid groups. The contact angle of the grafted membrane decreased from 94.3 to 46.7° with the increase in grafting yield. The higher the grafting yield, the faster the response and recovery rate with respect to humidity. AFM images showed that the diameter of the grafted chains on the surface of ETFE membranes was about 30 nm. The voltage of the grafted membrane was stable after 100 cycles of charge–discharge; thus, the prepared membranes have great potentials to be used as separators in secondary batteries.
机译：通过一步法合成了一种新型的具有双官能团的阳离子交换膜ETFE-g-poly（AA- co -SSS）。通过电子束诱导的预辐照接枝方法制备，并考察了反应温度，单体浓度，接枝溶液的pH值，辐照的聚（乙烯-铝-四氟乙烯）（ETFE）薄膜的储存时间和温度的影响。研究了接枝率。发现单体的总浓度为2μmolL〜（α1）对于丙烯酸（AA）和苯乙烯磺酸钠（SSS）共接枝到ETFE膜上是有益的。接枝膜的红外光谱分析证实了磺酸根和羧酸基团的存在。随着接枝率的提高，接枝膜的接触角从94.3°减小到46.7°。接枝产率越高，相对于湿度的响应和恢复速率越快。 AFM图像显示ETFE膜表面上的接枝链的直径为约30nm。经过100次充放电循环后，接枝膜的电压稳定。因此，制备的膜具有很大的潜力用作二次电池的隔膜。

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