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Self-assembled proton conduction networks consisting of SPEEK, NH2-POSS, and IL with enhanced proton conduction and decreased IL loss
Polymer ( IF 4.6 ) Pub Date : 2022-06-03 , DOI: 10.1016/j.polymer.2022.125011
Zhifu Guan , Yiqi Jin , Sha Shi , Biyao Jin , Meishan Zhang , Lianhua Zhao

To enhance the conductivity of sulfonated polyether ether ketone (SPEEK, SP) membrane and avoid the loss of ionic liquid (IL), using aminopropyloligosisiloxane (NH2-POSS) as molecular hybrid filler, a self-assembled medium temperature and non-humidified SP/IL/NH2-POSS hybrid membrane was prepared. NH2-POSS can be assembled into the hydrophilic domain ion phase of SPEEK. In which, –NH2 of NH2-POSS and –SO3H of SPEEK formed acid-base pairs at the interface which were conducive to the construction of proton transport channel. In addition, NH2-POSS enriched IL in the hydrophilic domain, which retained IL while synergistically increased the conductivity. The results showed that the IL loss rate of SP/IL/NH2-POSS-2 membrane was 46.9 wt%, which was about 55.8% of SP/IL membrane; the conductivity of SP/IL/NH2-POSS-2 membrane at 200 °C without humidification was 5.51 mS·cm−1, which was about 4 times that of SP/IL membrane.



中文翻译:

由 SPEEK、NH2-POSS 和 IL 组成的自组装质子传导网络,具有增强的质子传导和减少的 IL 损失

为提高磺化聚醚醚酮(SPEEK,SP)膜的电导率,避免离子液体(IL)的损失,以氨基丙基低聚硅氧烷(NH 2 -POSS)为分子杂化填料,自组装中温非加湿SP制备了/IL/NH 2 -POSS杂化膜。NH 2 -POSS 可以组装到SPEEK 的亲水域离子相中。其中,NH 2 -POSS的-NH 2和SPEEK的-SO 3 H在界面处形成酸碱对,有利于质子传输通道的构建。此外,NH 2-POSS在亲水结构域中富集了IL,它保留了IL,同时协同增加了电导率。结果表明,SP/IL/NH 2 -POSS-2膜的IL损失率为46.9 wt%,约为SP/IL膜的55.8%;SP/IL/NH 2 -POSS-2膜在200℃不加湿时的电导率为5.51 mS·cm -1,约为SP/IL膜的4倍。

更新日期:2022-06-08
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