一种多孔分离膜孔径及其分布的测定方法  

Method to define pore diameter and its distribution for porous membrane

作　　者：吕晓龙[1] 马世虎[1] 陈燚[1] 

机构地区：[1]天津工业大学中空纤维膜材料与膜过程教育部重点实验室,天津300160

出　　处：《天津工业大学学报》2005年第2期6-8,15,共4页Journal of Tiangong University

基　　金：国家973资助项目(2003CB615700)

摘　　要：针对欲测多孔膜孔径的不同,通过采用不相容的两种液体A-B液体体系的选择,可调节界面张力σAB值,使始透过压力P0值降至一个适宜的范围内,从而可在低压力下测定多孔膜最大孔径,由测定指定压力Pi下的透过液体流量Qit,可作出ηi-di孔径分布曲线.该方法与探针法相比,不需要昂贵复杂的测定仪器,并且可以简单快速测定多孔膜孔径及其分布曲线.Aiming at the difference of porous membrane sizes, by choosing the A-B liquid system which is consisting of two kinds of incompatible liquids, the surface tension σ_(AB) may be accommodated, then the beginning permeation pressure P_0 will be reduced to a fitting range, so the maximal pore size of porous membranes could be determined in low press.The porous pore size distribution curve η_i-d_i can be drawn with measuring liquid flux Q_(it) under appointed the press P_i. Comparing to the probe method, this method needn′t costly determination appratus, and porous pore size distribution curve can be drawn simply and speedly.

关 键 词：膜孔径 测定方法 分离 分布曲线 界面张力 最大孔径 液体流量 快速测定 测定仪器 不相容 可调节 多孔膜 低压力 探针法 QIS 透过 

分 类 号：TS176.5[轻工技术与工程—纺织材料与纺织品设计] TQ028.8[轻工技术与工程—纺织科学与工程]