膜科学与技术

功能化POSS/磷酸共掺杂高温质子交换膜制备及其性能

作者：庞博昊，段宇廷，赵成吉

单位：吉林大学化学学院，长春130012

关键词：质子交换膜；聚芳醚酮；笼型聚倍半硅氧烷；无机-有机杂化

出版年,卷(期):页码： 2023,43(1):83-90

摘要：

为提高磷酸掺杂率，增强膜在高温低湿下的质子传导率，同时保证其机械性能，将季铵化八氨苯基笼型聚倍半硅氧烷（QOAPS）与溴甲基化聚芳醚酮和季铵化试剂三甲胺共混，得到含有QOAPS的季铵盐型聚芳醚酮铸膜液，通过流延法制备成膜，进而用浸渍法掺杂磷酸，获得功能化POSS/磷酸共掺杂型聚芳醚酮高温质子交换膜（PA-QPAEK@QOAPS）。功能化POSS的引入，显著提高了膜的磷酸掺杂水平，在较高磷酸含量下，膜仍具有较好的机械强度以及尺寸稳定性，同时180 ℃下共掺杂型聚芳醚酮膜的质子传导率相较于原始季铵化聚芳醚酮膜提高了56%。

Abstract: The amount of phosphoric acid doping is crucial to the performance of phosphoric acid doped high temperature proton exchange membrane (HT-PEM). In order to increase the doping amount of phosphoric acid and thus improving the proton conducting performance of poly(aryl ether ketone) (PAEK)-based composite membranes while ensuring sufficient mechanical property, a kind of phosphoric acid doped functionalized POSS/PAEK hybrid membranes was developed. First, quater22179047octa(aminophenyl)-POSS (QOAPS) was blended with bromomethylated PAEK (Br-PAEK) polymer. Second, trimethylamine was used as quaternized reagent to prepare quaternized PAEK containing QOAPS (QPAEK@QOAPS). Finally, phosphoric acid was doped into the membrane (PA-QPAEK@QOAPS). The effects of QOAPS content on the PA doping and membrane performance were investigated. It was found that when the doing amount of QOAPS in the blended membrane was 10 wt%, compared with the original membrane, the phosphoric acid doping level of QPAEK@QOAPS membranes could be increased by 31% and the proton conductivity was increased by 56% at 180 ℃, while the membrane still maintained good mechanical strength.

庞博昊（1999-），男，天津，本科，研究方向为高分子材料，E-mail:1226070340@qq.com.

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