高选择性管式硅基裂解膜制备条件对性能的影响  

Effect of preparation conditions on properties of tubular pyrolysis silicon based membrane with high permselectivity

作　　者：张全生[1] 王树森[1] 曾美云 王志忠 

机构地区：[1]北京工业大学环境与能源工程学院,北京100022

出　　处：《膜科学与技术》2000年第3期4-8,共5页Membrane Science and Technology

基　　金：国家自然科学基金! (2 9776 0 0 1)

摘　　要：分子结构规整的有机硅树脂致密膜 ,经控制裂解可制得具有较高选择透过性的气体分离膜 .这种膜是一种多孔膜 ,其最可几孔径为 0 .6nm ,具有极窄的孔径分布 ,对气体分离机理为分子筛分 .膜对H2 /N2 分离因子可达 90 ,对O2 /N2 分离因子可达 17,比常规裂解膜高 3～5倍 .本文着重讨论了有机硅致密膜制备条件对其裂解膜性能的影响 .A new highly selective silicon based molecular sieve membrane was developed by pyrolyzing a silicon resin precursor with regular structure under control conditions.The membrane is a porous membrane.The pore size distribution of the membrane is narrow,and the most probable pore size is about 0.6 nm. Gases separation mechanism of the membrane is molecular sieve.The separation factors for H 2/N 2 and O 2/N 2 reach 90 and 17,which were 3～5 times higher than those of conventional pyrolysis membranes.The effect of preparation coditions of the precursor on the properties of the resulting pyrolysis membrane is discussed in this paper.

关 键 词：硅基裂解膜 孔径分布 无机膜 膜分离 气体分离 

分 类 号：TQ26[化学工程—有机化工]