摘要
以对-甲基丙烯酰胺基苯磺酸(MABSA)为亲水单体,碱化处理的聚偏氟乙烯(PVDF)为疏水性骨架,偶氮二异丁腈(AIBN)为引发剂,采用自由聚合法制备了两亲性共聚物PVDF-g-PMABSA。将PVDF-g-PMABSA作为添加剂,采用共混改性技术,通过非溶剂致相转化法(NIPS)制备了PVDF/PVDF-g-PMABSA复合膜。红外光谱(FTIR)和核磁共振氢谱(1 H NMR)分析结果表明,PMABS成功接枝到PVDF主链上。利用X光电子能谱(XPS)、表面接触角(CA)、Zeta电位仪、扫描电镜(SEM)等测定技术对复合膜表面结构和性质进行表征。同时研究了复合膜对牛血清蛋白(BSA)溶液的分离效率和抗污染能力。实验结果表明:当聚合物PVDF-g-PMABSA添加量为3.5%时,复合膜相对原膜,其纯水通量由原膜的63.37L/(m^2·h)增加到136.65L/(m^2·h),通量恢复率由原膜的34.37%增加到85.54%。
Amphiphilic copolymer PVDF-g-PMABSA was prepared by means of radical polymerization with P-methylacrylamide benzenesulfonic acid（MABSA）as hydrophilic monomer,alkalized polyvinylidene fluoride（PVDF）as hydrophobic skeleton,and azodiisobutyronitrile（AIBN）as initiator,and PVDF/PVDF-g-PMABSA composite membrane was synthesized with the method of non-solvent phase transformation（NIPS）with PVDF-g-PMABSA as additive and with blending modification technology.The analysis results of infrared spectroscopy（FTIR）and H-NMR indicate that PMABS has been successfully grafted to PVDF backbone.The surface texture and properties of the composite membrane were represented with a series of determination technologies,including X electron spectroscopy（XPS）,surface contact angle（CA）,Zeta potentiostat,and scanning electron microscope（SEM）.Meanwhile,the efficiency of the composite membrane of separating bovine serum albumin（BSA）solution and its fouling resistance were studied.The results suggest that by adding 3.5% PVDF-g-PMABSA,the pure water flux of the composite membrane is increased from 63.37 L/（m^2·h）to 136.65 L/（m^2·h）,and the flux recovery is increased from 34.37%to 85.54%.
出处
《浙江理工大学学报（自然科学版）》
2018年第2期242-250,共9页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
