膜科学与技术

硅烷偶联剂改性钛酸钡对SPEEK质子交换膜性能的影响

作者：董翠翠，王艺洁，孙进，周琼

单位： 1.中国石油化工股份有限公司大连石油化工研究院，辽宁大连 116045；2.中国石油大学（北京）新能源与材料学院，北京 102249

关键词：磺化聚醚醚酮，硅烷偶联剂，钛酸钡

出版年,卷(期):页码： 2020,40(4):55-61

摘要：

为提高无机填料在聚合物中的分散性，本文利用硅烷偶联剂KH570对钛酸钡（BT）表面改性。采用溶液浇铸法制备磺化聚醚醚酮（SPEEK）/改性钛酸钡（KH570-BT）复合质子交换膜。利用透射电镜观察了改性前后BT在SPEEK基体中的分散情况并系统的研究了KH570-BT掺杂量对复合质子交换膜性能的影响。结果显示，与BT相比，KH570-BT的分散性得到明显改善。将KH570-BT掺杂进SPEEK后，复合膜的质子电导率、甲醇渗透率、热稳定性及选择性均出现明显提升。室温下，SPEEK/KH570-BT-1.0复合膜的质子电导率达到63.7 mS/cm，高于同配比的SPEEK/BT-1.0（σ=57.7 mS/cm）和SPEEK（σ=58.6 mS/cm）；SPEEK/KH570-BT-1.0的选择性达到20.9×104 S s/cm3，与SPEEK/BT-1.0（17.2×104 S s/cm3）和SPEEK（17.7×104 S s/cm3）相比，分别提升了21.5%和18.1%。

Barium titanate (BT) was modified by KH570 to improve its dispersion in polymers. The sulfonated poly(ether ether ketone) (SPEEK)/KH570 modified barium titanate (KH570-BT) composite proton exchange membrane was prepared by solution casting method. The dispersion of BT and KH570-BT in SPEEK was observed by TEM. The influences of KH570-BT on the properties of composite membrane was studied systematically. The results show that the incorporation of KH570-BT can improve the proton conductivity, methanol permeability, thermal stability and selectivity of SPEEK. The proton conductivity of the SPEEK/KH570-BT-1.0 composite membrane reached 63.7 ms/cm, higher than SPEEK/BT-1.0 (σ = 57.7 ms/cm) and SPEEK (σ = 58.6 ms/cm) , the selectivity of SPEEK/KH570-BT-1.0 was 20.9×104 S s/cm3, which was 21.5% and 18.1% higher than SPEEK/BT-1.0 and SPEEK respectively.

第一作者简介：董翠翠（1985-），女，辽宁省人，博士，主要从事质子交换膜燃料电池的研究，E-mail：dongcuicui.fshy@sinopec.com 通讯作者，E-mail：zhouqiong_cn@163.com

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