铸膜液溶剂的相互作用及其对EC气体分离膜的影响  

The Interactions Between Solvents of Casting Membrane Solution and Their Effects on Gas Permeability of EC Membrane

作　　者：尚修勇[1] 陈姗妹 施孝[1] 朱子康[2] 

机构地区：[1]宁波大学应用化学研究所 [2]上海交通大学高分子材料研究所

出　　处：《Chinese Journal of Chemical Physics》1997年第5期475-480,共6页化学物理学报（英文）

基　　金：浙江省自然科学基金

摘　　要：报道了由双组份以上溶剂混合组成的铸膜液可以显著提高对ＥＣ的溶解性，从而可以扩大ＥＣ溶剂和提高铸膜液浓度。通过溶剂分子中基团和链的ＩＲ光谱的变化，表征了溶剂体系的相互作用，这种相互作用是由于溶剂分子间发生氢键或电荷转移。强极性溶剂甲酰胺可提高ＥＣ膜的气体分离因子而降低透气性，此外，继续向双组份溶剂体系中加第三或第四组份溶剂，均有利于提高膜的气体分离性，但透气量却有下降。Casting membrane solution with more than two cpmponent solvents to increase remarably EC solubility is reported. Thus the option for EC solvents and concentration of casting solution could be improved. The interactions between solvent systems are charaterized through IR spectra shift of group and linkage of solvent molecules. It is considered that hydrogen bonds as well as electronic charge transfer between solvent molecules might be happened. Formamide, a strong polar solvent increase gas separation factor greatly of EC membrane, but decreases gas permeation. In addition, a third or forth solvent component mixed into a casting solution with two or three components will also be benifit to gas seperation of membranes, however decrease gas permeation.

关 键 词：乙基纤维素 红外光谱 气体分离膜 铸膜液溶剂 

分 类 号：O658.9[理学—分析化学]