膜科学与技术

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Preparation and acid and alkali resistance of PVDF/PSA tubular composite nanofiltration membrane

Authors： LIU Enhua, LI Shipeng，LI Shiwei , YANG Lijuan

Units： 1. Laboratory of Hollow Fiber Membrane Material and Membrane Process, Tianjin Polytechnic University, Tianjin 300387, China; 2. Tianjin Hipure Membrane Technology Co. Ltd., Tianjin 300304, China

KeyWords： Polysulfonamide; Tubular nanofiltration membrane; Interfacial polymerization; Resistance to acid and alkali

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2022,42(5):48-57

Abstract：

In this paper, PSA composite tubular nanofiltration membranes ⅰ and ⅱ were prepared by interfacial polymerization using PVDF tubular ultrafiltration membrane as base membrane, anhydrous piperazine (PIP) as aqueous monomer and benzene-1, 3, 5-trisulfonyl chloride (TSC) as organic monomer. The effects of additive concentration, post-water blowing time and organic reaction time on the performance of PSA nanofiltration membrane were studied. The results showed that the retention rates of PSA NANofiltration membranes I and PSA nanofiltration membranes II to 2000mg/L MgSO4 aqueous solution at 25℃ and 0.4MPa were 95% and 76%, and the fluxes were 27 L·m-2·h-1 and 28 L·m-2·h-1, respectively. Its acid and alkali resistance increased from ph=3~12 to pH =0~14, and the nanofiltration membrane performance remained stable after soaking in different concentrations of acid and alkali solutions for 22 days.

Funds：

天津市科技计划项目(16PTGCCX00070)

AuthorIntro：

刘恩华（1973-），男，副研究员，硕士生导师，主要研究方向为管式膜的制备与应用.E-mail：450221508@qq.com

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