Novel partially fluorinated graft block copolymer ionomer as potential proton exchange membrane material
Novel partially fluorinated graft block copolymer ionomer as potential proton exchange membrane material
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新型部分氟化接枝嵌段共聚物离聚物作为潜在的质子交换膜材料
DOI：
10.1016/j.polymer.2016.04.046
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发表时间：
2016
期刊：
影响因子：
4.6
通讯作者：
E. E. Unveren
中科院分区：
文献类型：
--
作者：
Cigdem Bilir;T. Erdogan;Serhat Odabas;E. E. Unveren
通过双击反应（Cu催化的Huisgen反应和Diels-Alder反应）和后磺化反应合成了一种结构明确的接枝嵌段共聚物离聚物（PFPMA-b-PMMAt）-g-SPS，该离聚物由聚甲基丙烯酸2，2，3，3，3-五氟丙酯-嵌段-聚甲基丙烯酸9-蒽甲酯（PFPMA-b-PMMAt）-主链和部分磺化的聚苯乙烯侧链组成。该接枝离聚物的合成是三步过程，包括（i）通过原子转移自由基聚合（ATRP）制备马来酰亚胺、炔和叠氮端官能聚合物，（ii）在一锅技术中进行双击反应，和（iii）聚苯乙烯嵌段的苯环的磺化反应，以产生微相分离的接枝嵌段离聚物结构。SEC（尺寸排阻色谱）结果显示使用ATRP和双击反应的成功的“接枝自”方法。采用溶液浇铸法制备了接枝嵌段离聚物及其磺化聚苯醚（SPPO）共混物的膜。所产生的膜的特征在于在离子交换容量（IEC），水的吸收，质子传导性，和热性能。用芬顿实验考察了膜的氧化稳定性。通过扫描电子显微镜（SEM）研究了干膜的形态。已经发现，在80 °C和100%相对湿度下测量的接枝嵌段离聚物/SPPO共混物膜的电导率显著高于具有较高离子交换容量的纯SPPO的电导率。
A novel well-defined graft block copolymer ionomer consisting of poly(2,2,3,3,3-pentafluoropropyl methacrylate)-block-poly(9-anthrylmethyl methacrylate) backbone and partially sulfonated polystyrene side chains, i.e. (PFPMA-b-PMMAnt)-g-SPS was synthesized using double click reactions (Cu catalyzed Huisgen and Diels–Alder reactions) and postsulfonation reaction. The synthesis of this graft ionomer is a three-step procedure including (i) the preparation of maleimide, alkyne and azide end-functional polymers via atom transfer radical polymerization (ATRP), (ii) performing double click reactions in one-pot technique, and (iii) sulfonation reaction of phenyl ring of polystyrene block to yield microphase separated graft block ionomer structure.1H NMR, FT-IR spectroscopy, SEC (size exclusion chromatography) results present the successful “grafting from” method using ATRP and double click reaction. Both the membranes from graft block ionomer and its sulfonated poly(phenylene oxide) (SPPO) blends were prepared by solution casting method. The produced membranes were characterized in terms of ion exchange capacity (IEC), water uptake, proton conductivity, and thermal properties. Oxidative stabilities of the membranes were also investigated by Fenton test. The morphology of dry membranes was investigated by scanning electron microscopy (SEM). It has been found that the conductivity of the graft block ionomer/SPPO blend membrane measured at 80 °C and relative humidity of 100% is considerably higher than that of the pure SPPO possessing higher ion-exchange capacity.