PVDF/PSA管式复合纳滤膜的制备与耐酸碱的研究  

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

作　　者：刘恩华[1] 李世鹏 李士伟 杨利娟 LIU Enhua;LI Shipeng;LI Shiwei;YANG Lijuan(Laboratory of Hollow Fiber Membrane Material and Membrane Process,Tiangong University,Tianjin 300387,China;Tianjin Hipure Membrane Technology Co.Ltd.,Tianjin 300304,China)

机构地区：[1]天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室,天津300387 [2]天津海普尔膜科技有限公司,天津300304

出　　处：《膜科学与技术》2022年第5期48-57,共10页Membrane Science and Technology

基　　金：天津市科技计划项目(16PTGCCX00070)。

摘　　要：以PVDF管式超滤膜为基膜,以无水哌嗪(PIP)为水相单体、苯-1,3,5-三磺酰氯(TSC)为有机相单体,通过界面聚合制备PSA复合管式纳滤膜Ⅰ和Ⅱ,研究了添加剂的浓度、水相后吹风时间、有机相反应时间等对分离膜性能的影响,通过FTIR、XPS、SEM对PSA纳滤膜进行了表征。结果表明,制备的PSA纳滤膜Ⅰ和Ⅱ在25℃、0.4MPa下对2000mg/L的MgSO_(4)水溶液的截留率为95%和76%,通量分别为27和28 L/(m^(2)·h);其耐酸碱性从pH=3~11上升为pH=0~14,且在不同浓度的酸碱溶液中浸泡22 d,纳滤膜性能依然稳定.In this paper,PSA composite tubular nanofiltration membranesⅠandⅡwere 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 membranesⅠand PSA nanofiltration membranesⅡto 2000 mg/L MgSO_(4)aqueous solution at 25℃and0.4 MPa were 95%and 76%,and the fluxes were27 L/(m^(2)·h)and28 L/(m^(2)·h),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.

关 键 词：聚磺酰胺 管式纳滤膜 界面聚合 耐酸碱 

分 类 号：TQ028.8[化学工程]