膜科学与技术

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Method evaluation of porous membrane porosity measurement by gas-liquid displacement method

Authors： DONG Zeliang，PAN Xianhui，ZHANG Yanping，HAO Jun，WANG Xuliang，LI Zongyu，ZHAO Jinghong

Units： The Institute of Seawater Desalination and Multipurpose Utilization，MNR(Tianjin)，Tianjin 300192，China

KeyWords： gas-liquid replacement method；porous membrane；porosity；pore size

ClassificationCode：TQ028

year,volume(issue):pagination： 2024,44(2):112-117

Abstract：

Porosity is an important technical parameter of porous membrane materials，which is closely related to its permeation process．The gas-liquid displacement method can be operated at room temperature and measure the through holes porosity of porous membranes，which can accurately characterize the permeability of porous membrane．The testing principle and experimental method of porous membrane porosity test by gas-liquid displacement method have been elaborated．In further，the universality of this method for different material membrane，different pore size membrane and different test liquid，method precision and method comparison have been carried out．The results show that the method is scientific in principle，simple in operation and can be operated simply and has high precision，which is a universal method suitable for the porosity testing of porous membranes of various materials，different types and different pore sizes．

Funds：

中央级公益性科研院所基本科研业务费专项资金项目（K-JBYWF-2021-T06）

AuthorIntro：

董泽亮（1984—），男，硕士，安徽蚌埠人，从事分离膜检测及评价技术研究，E-mail：dzl4128@163.com

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