化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (8) : 157-161. DOI: 10.19817/j.cnki.issn1006-3536.2022.08.030

科学研究

桥接聚甲基硅氧烷/乙基纤维素/ZSM-5三元复合膜的制备及气体分离性能研究

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Preparation and gas permoselectivity of BBPMS/EC/ZSM-5 ternary composite membrane

Ma Wenqiang¹, Xu Shuangping¹, Jia Hongge¹, Xu Jingyu¹, Liu Da², Zhang Mingyu¹, Qu Yanqing¹, Zhou Hailiang¹, Zhang Yushu¹, Yang Guoxing³, Zhao Wenwen¹, Wang Xintian¹, Zha Yuxin¹

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Received
2021-04-23
Issue Date	Revised Date
2022-08-29	2021-04-23

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摘要

以四氢呋喃(THF)为溶剂,在高速搅拌下辅于超声振荡制备了一系列不同比例的丁二烯桥接聚甲基氢硅氧烷(BBPMS)/乙基纤维素(EC)/ZSM-5三元铸膜液、涂膜制得了一系列BBPMS/EC/ZSM-5三元复合膜。采用红外光谱(FT-IR)和扫描电镜(SEM)对膜的结构进行了表征,通过薄膜拉伸强度测试仪、热失重分析和气体透过仪对膜性能进行了测试。结果表明:制得的三元复合膜表面致密平整、分布均匀、无团聚现象,具有良好的成膜性、耐热性及力学性能;三元复合膜对CO₂的透过系数达到了822Barrer,是EC/ZSM-5混合基质膜的29.8倍;当BBPMS掺杂量在80%~90%时,BBPMS/EC/ZSM-5三元复合膜的CO₂/N₂气体透过分离性能接近Robeson 08年曲线。

Abstract

A series of butadiene-bridged polymethylhydrosiloxane (BBPMS)/ethylcellulose (EC)/ZSM-5 ternary composite membranes were prepared under high speed blend and ultrasonic vibration-assisted in tetrahydrofuran(THF),by using the casting solution method.The structure of the membranes was characterized by FT-IR and SEM.The membranes exhibited good membrane forming ability,heat resistance and mechanical properties.The membranes shown higher permeability of CO₂,the CO₂ permeability was up to 822 Barrer,increased up to 28.9 times as compared to the previous EC/ZSM-5 membrane.Notably,the CO₂ and N₂ permselectivities of the membranes with the contents of BBPMS at 80%~90% were very close Robeson's upper bound (2008).

关键词

乙基纤维素 / 丁二烯桥接聚甲基氢硅氧烷 / ZSM-5 / 复合膜 / 气体分离

Key words

EC / BBPMS / ZSM-5 / composite membrane / gas separation

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桥接聚甲基硅氧烷/乙基纤维素/ZSM-5三元复合膜的制备及气体分离性能研究[J]. 化工新型材料, 2022, 50(8): 157-161 DOI:10.19817/j.cnki.issn1006-3536.2022.08.030

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