PVDF/SiO_2/PA中空纤维纳滤复合膜研究  

Study on PVDF/SiO_2/PA Hollow Fiber Composite Nanofiltration Membrane

作　　者：孙文挺 梁义[1] 胡晓宇[1] 陈英波[2] 王中阳[2] 

机构地区：[1]天津膜天膜科技股份有限公司,天津300457 [2]天津工业大学,天津300387

出　　处：《天津科技》2015年第7期51-53,共3页Tianjin Science & Technology

基　　金：国家海洋经济创新发展区域示范项目(CXSF2014-31)

摘　　要：以十六烷基四甲基溴化铵(CTAB)为模板,去离子水为共溶剂,正硅酸乙酯(TEOS)为硅源,酸性条件下,在熔融纺丝法聚偏氟乙烯(PVDF)中空纤维膜表面合成介孔二氧化硅(Si O2)功能层,以均苯三甲酰氯(TMC)为油相单体、哌嗪(PIP)为水相单体,通过界面聚合在介孔Si O2功能层表面形成聚酰胺(PA)功能层,制备了PVDF/Si O2/PA中空纤维纳滤复合膜。采用SEM、XRD、FTIR等方法对复合膜进行了表征,探讨了水相PIP浓度对复合膜性能的影响。0.5,MPa下以2,g/L Mg SO4溶液为测试液,所得中空纤维纳滤复合膜的截留率达到95.0%,,水通量可达21.8,L·m-2·h-1。Using cetyltrimethylammonium bromide （CTAB） as template,deionized water as cosolvent and tetraethoxysilcane（TEOS） as the source of inorganic silica in acid media with HCl,the mesoporous silica （SiO2） was prepared on themelt-spinning polyvinylidene fluoride （PVDF） hollow fiber microfiltration membrane as the first separation layer. The polyamide（PA） was formed by interfacial polymerization （IP） reaction between trimesoyl chloride （TMC） and piperazine （PIP）molecules on the hollow fiber membrane as the second separation layer. Through these two steps,hollow fiber nanofiltrationcomposite membrane of PVDF/SiO2/PA was prepared. Influences of PIP concentration on the nanofiltration composite membrane’sperformance were investigated by means of SEM,XRD,FTIR and etc. The PVDF/SiO2/PA hollow fiber nanofiltrationcomposite membrane with flux of 21.8 L·m^-2·h^-1 and a rejection to MgSO4 of 95.0% was obtained by measuring inaqueous solution containing 2 g/L of MgSO4 at 0.5MPa.

关 键 词：PVDF 复合 中空纤维 纳滤膜 

分 类 号：TQ028.8[化学工程]