高透过性三聚氰胺/乙基纤维素混合基质膜的制备及性能研究

Study on preparation and performance of high permeability melamine/EC MMMs

以乙基纤维素(EC)为基体,四氢呋喃(THF)为溶剂,在高速搅拌下辅于超声振荡和三聚氰胺共混、涂膜制得了一系列三聚氰胺含量不同的三聚氰胺/EC混合基质膜。采用傅立叶红外光谱对膜的结构进行表征,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:制得的混合基质膜具有良好的成膜性、耐热性及力学性能;与纯EC膜相比,混合基质膜对CO_(2)的透过性有了一定的提升,其中CO_(2)/CH4混合气的CO_(2)透过达到了85.9Barrer,是纯EC膜的1.9倍;CO_(2)/N_(2)混合气的CO_(2)的透过量达到了96.4Barrer,是纯EC膜的2.1倍。

A series of mixed matrix membranes(MMMs)with ethyl cellulose(EC)as matrix and melamine as modifier in tetrahydrofuran(THF)were prepared under high speed and ultrasonic vibration-assisted,by using the casting solution method.The melamine/EC membranes exhibited good membrane forming ability,heat resistance and mechanical properties.The successful melamine/EC mixed matrix membranes were confirmed by fourier transfer infrared(FT-IR).The CO_(2) permeability of the CO_(2)/CH4 mixture was 85.9 Barrer,respectively,increased up to 1.9 times as compared to pure EC(45.3 Barrer).The CO_(2) permeability of the CO_(2)/N_(2) mixture was 96.4 Barrer,respectively,increased up to 2.1 times as compared to pure EC(45.4 Barrer).