膜科学与技术

Position：Home >> Abstract

Measurement of porosity of polylactic acid biofilm by gas-liquid displacement method

Authors： DONG Zeliang，ZHANG Yanping，LI Zongyu，ZHAO Jinghong，WANG Xuliang，PAN Xianhui，YAN Wenzhi

Units： 1.The Institute of Seawater Desalination and Multipurpose Utilization，MNR(Tianjin),Tianjin 300192，China;2.Shandong Zhaojin Motian Co., LTD.

KeyWords： gas-liquid replacement method；porosity；pore size；polylactic acid；biofilm

ClassificationCode：TQ028

year,volume(issue):pagination： 2023,43(3):74-80

Abstract：

The gas-liquid displacement method is usually used to test the pore size parameters of microporous membrane at room temperature．When used for porosity testing，the porosity of through holes of microporous membranes can be obtained．Polylactic acid plate membrane was selected to study the measurement of microporous membrane porosity，including selection of test liquid，determination of test conditions，method precision and method comparison．The results show that the end point of pressure boost is the key control condition of porosity measurement by gas-liquid displacement method．The pressure boost should be stopped to end the gas-liquid displacement process after the wet curve changes into a straight line and the gas flow through the membrane reaches the gas flow value corresponding to the intersection of wet curve and dry curve during the testing proces of pore size．This method can be operated simply and has high precision，which is a scientific and appropriate method to replace thermal method to test the porosity of hydrophobic，thermally unstable and easily decomposed microporous membranes such as polylactic acid membrane．

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，从事分离膜检测及评价技术研究，E-mail：dzl4128@163.com

Reference：

[1]吕晓龙．中空纤维多孔膜性能评价方法探讨[J]．膜科学与技术，2011，31（2）：1-6．
[2]张艳萍，潘献辉，王旭亮，等．中空纤维微滤膜孔径检测方法研究[J]．膜科学与技术， 2013，33（3）：97-101．
[3]董泽亮，潘献辉，李宗雨，等．气体渗透法测量聚偏氟乙烯微孔膜孔径影响因素的研究 [J]．膜科学与技术，2020，40（1）：148-158．
[4]国家海洋局．HY/T 039-1995，微孔滤膜孔性能测定方法[S]．北京：中国标准出版社，1996．
[5]刘文龙，晏宸然，危梦，等．不同聚乳酸膜的抗菌性比较[J]．现代食品科技，2020，36（3）：175-179．
[6]李宣，杜纪富．聚乳酸膜的研究进展[J]．广州化工，2017，45（15）：21-23．
[7]中华人民共和国国家质量监督检验检疫总局，中国国家标准化管理委员会．GB/T 32361-2015，分离膜孔径测试方法泡点和平均流量法[S]．北京：中国标准出版社，2016．
[8]国家海洋局．HY/T 065-2002，聚偏氟乙烯微孔滤膜[S]．北京：中国标准出版社，2002．

Service：

【Download】【Collect】

《膜科学与技术》编辑部 Address: Bluestar building, 19 east beisanhuan road, chaoyang district, Beijing; 100029 Postal code; Telephone：010-80492417/010-80485372; Fax：010-80485372 ; Email：mkxyjs@163.com