Optimizing membrane degassing with Hyflon AD 40L-modified polypropylene hollow fiber and pre-filling techniques  

作　　者：Hongyu Chen Yinchao Jin Zhiying Lu Yangming Cheng Zhaohui Wang Zhaoliang Cui 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China [2]National Engineering Research Center for Special Separation Membrane,Nanjing Tech University,Nanjing 210009,China [3]Jiangsu Aikemo High-Technology Co.,Ltd,Suzhou 215000,China [4]Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing Tech University,Nanjing 210009,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第11期181-190,共10页中国化学工程学报（英文版）

基　　金：financial support of the National Key Research and Development Program of China(2020YFC0862903);the National Natural Science Foundation of China(22078146);the Key Research and Development program of Jiangsu Province(BE2021022);the Materials-Oriented Chemical Engineering State Key Laboratory Program(KL19-04);the Natural Science Foundation of Jiangsu Province(BK20200091).

摘　　要：This paper conducts a comparative analysis of the anti-wetting properties and degassing performance of both homemade and commercial membranes.Additionally,it introduces a unique approach to hydrophobic modification of high-flux membranes.The study involved the utilization of Hyflon AD40L for multiple coatings on the surface of polypropylene(PP)hollow fiber membranes.Several variables,including modification solution concentration,temperature,coating duration,number of coating cycles,polymer type,and the choice and concentration of the pore-blocking agent,were systematically investigated to establish the optimal modification process.Characterization of the modified membrane and degassing experiments revealed significant improvements.Specifically,the contact angle increased from 95.5°to 113.1°,while the trans-membrane differential pressure surged from 10.7 kPa to 154.6 kPa,marking a remarkable 14.4-fold enhancement.This enhancement is attributed to the improved antiwetting capabilities of the modified membrane.In the degassing experiments,the modified membrane-based module demonstrated an impressive 95.0%dissolved oxygen removal rate,with a corresponding mass transfer coefficient reaching 18.01×10^(-3)m·h^(-1).These results underscore the substantial potential of the Hyflon AD40 L/PP membrane for applications in membrane degassing.

关 键 词：Hyflon POLYPROPYLENE Anti-wetting modification Membrane degassing Pore-blocking agent 

分 类 号：TQ340.64[化学工程—化纤工业] TQ051.893