摘要
咪唑类离子液体(ILs)对CO_(2)具有良好的亲和性和溶解性。离子液体与聚酰亚胺膜材料相结合,可以解决目前CO_(2)难以分离和回收的问题。选用3种烷基链长度不同的离子液体与聚酰胺酸进行共混,通过高速搅拌器制备出一系列聚酰亚胺/离子液体共混膜,ILn含量为5%、10%、15%、20%。采用薄膜拉伸强度测试仪和气体透过仪对膜进行了测试。结果表明:离子液体共混的聚酰亚胺薄膜的力学性能相对于纯膜来说均有所提高。当离子液体为IL_(2),共混含量为20%时,膜对CO_(2)的渗透性能最好,为1.5033Barrer,是纯膜的3倍;当离子液体为IL_(2),共混含量为15%时,膜对CO_(2)/CH4的分离性能最好,为21.7859,约为纯膜的7倍。
Imidazole-based ionic liquids(ILs)have good affinity and solubility for carbon dioxide(CO_(2)).The combination of ionic liquid and polyimide membrane material can solve the problem that CO_(2) is difficult to separate and recover at present.Three ionic liquids with different alkyl chain lengths were selected and blended with polyamide acid to prepare a series of polyimide/ionic liquid blend membranes with ILn contents of 5%,10%,15%,20%by a high-speed stirrer.The membranes were tested using a membrane tensile strength tester and a gas permeation meter.The results showed that the mechanical properties of polyimide membranes blended with ionic liquids were improved compared with pure membrane.When the ionic liquid was IL_(2) and the blending content was 20%,the permeability of the membrane to CO_(2) was the best,reaching 1.5033Barrer,which was three times that of the pure membrane;when the ionic liquid was IL_(2) and the blending content was 15%,the membrane had the best separation performance for CO_(2)/N_(2),which reaching 21.7859,which was approximately seven times that of pure membrane.
作者
赵士君
贾宏葛
徐双平
张明宇
蘧延庆
查雨欣
Zhao Shijun;Jia Hongge;Xu Shuangping;Zhang Mingyu;Qu Yanqing;Zha Yuxin(Key Laboratory of Polymeric Composite Materials of Heilongjiang Province,College of Chemistry and Chemical Engineering,College of Materials Science and Engineering,Qiqihar University,Qiqihar 161006)
出处
《化工新型材料》
CAS
CSCD
北大核心
2023年第10期102-107,共6页
New Chemical Materials
基金
黑龙江省重点研发指导项目(GZ20210034)
中国黑龙江省领先人才梯队基础设施基金(2019-278)
黑龙江省高校基础研究基金项目(135309503)
齐齐哈尔大学研究生创新科研项目(YJSCX2021006)。
关键词
聚酰亚胺
离子液体
气体分离膜
分离渗透性能
polyimide
ionic liquid
gas separation membrane
separation permeability
作者简介
赵士君(1996-),女,硕士研究生,主要研究方向为聚酰亚胺气体分离膜,E-mail:zhaoshijun722@163.com;通讯作者:贾宏葛(1978-),男,教授,硕士研究生导师,主要研究方向为聚酰亚胺气体分离膜、过渡金属催化剂,E-mail:jiahongge@qqhru.edu.cn。
