摘要
采用硅烷化二胺2,2-双(3-氨基-4-羟基苯基)六氟丙烷与4,4烷与六氟异丙基二苯酸酐进行缩聚,化学亚胺化后得到溶解性好的高分子量聚聚酰亚胺膜,并有较好的成膜性,经过350~400基热处理后得到不同程度的热重排改性膜,红外光谱证明成功制备出聚酰亚胺和热重排改性膜。而随着热处理温度的升高,CO_(2)的渗透性能递增的,由此可见噁唑环的转化使得分子链刚性增强从而达到提高气体渗透。400℃热重排膜CO_(2)的渗透性能从25.81 Barrer提升到568.35 Barrer,提高了22倍,热重排后的膜对CO_(2)/N_(2)的气体透过性能接近2008年Robeson上限。
The silanized diamine 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane and 4,4'-hexafluoroiso-propyl diphenyl anhydride were used for polycondensation.After chemical imination,high molecular weight polyimide membranes with good solubility and good film-forming properties were obtained.After heat treatment at 350~400℃,the modified membranes with different degrees of thermal rearrangement were obtained.FT-IR spectra showed that the polyimide and thermal rearrangement modified membranes were successfully prepared.With the increase of heat treatment temperature,the permeability of CO_(2)increased.It was seen that the transformation of oxaz1ole ring made the molecular chain rigid,so as to improve the gas permeability.The CO_(2)permeability of the rearranged films at 400℃increased by 22 times from 25.81 Barrer to 568.35 Barrer,and the CO_(2)/N2 gas permeability of the rearranged membranes was close to the 2008 Robeson upper bound.
作者
邹永兰
贾宏葛
徐蕊
赵士君
闻芯君
ZOU Yong-lan;JIA Hong-ge;XV Rui;ZHAO Shi-jun;WEN Xin-jun(College of Chemistry and Chemical Engineering,College of Materials Science and Engineering,Qiqihar University,Qiqihar Heilongjiang 161000,China;Heilongjiang Provincial Key Laboratory of Polymeric Composition Materials,College of Materials Science and Engineering,Qiqihar University,Qiqihar Heilongjiang 161000,China)
出处
《辽宁化工》
CAS
2023年第12期1745-1748,共4页
Liaoning Chemical Industry
基金
黑龙江省重点研发计划指导类项目(项目编号:GZ20210034)
黑龙江省领军人才梯队后备带头人资助项目(项目编号:黑人社函2019(278)号)。
关键词
硅烷化
聚酰亚胺
热重排
气体分离膜
Silanization
Polyimide
Thermal rearrangement
Gas separation membrane
