紫外光接枝丙烯酸对聚丙烯微孔膜抗污染性能的影响研究  

Study on antifouling of polypropylene microporous membrane with UV grafted acrylic acid

作　　者：田间 魏俊富[1,2,3] 王翱[2,3] 董宇 李雪曦 Tian Jian;Wei Junfu;Wang Ao;Dong Yu;Li Xuexi(State Key Laboratory of Separation Membranes and Membrane Processes,Tianjin Polytechnic University,Tianjin 300387;School of Environmental and Chemical Engineering,Tianjin Polytechnic University,Tianjin 300387;Tianjin Engineering Center for Safety Evaluation of Water &Safeguards Technology ,Tianjin Polytechnic University,Tianjin 300387)

机构地区：[1]天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387 [2]天津工业大学环境与化学工程学院,天津300387 [3]天津工业大学天津市水质安全评价与保障技术工程中心,天津300387

出　　处：《化工新型材料》2018年第11期160-164,共5页New Chemical Materials

基　　金：国家自然科学基金(51678409);天津市科技支撑计划重点项目(15ZCZDSF00880)

摘　　要：采用紫外光接枝聚合的方法将丙烯酸(AA)引入到聚丙烯(PP)微孔膜表面,制备了亲水改性微孔膜PPg-PAA。采用傅里叶变换红外光谱仪(FT-IR)、扫描电子显微镜(SEM)对PP-g-PAA微孔膜进行表征,考察了接枝条件对膜接枝密度的影响,分析了接枝密度对膜水通量和抗污染性能的影响。结果表明,水通量随着PP-g-PAA微孔膜接枝密度的增加先增大后减小。当AA接枝密度为1642.5μg/cm^2时,PP-g-PAA微孔膜通量损失率降到36.5%,可逆污染系数提高到29%,不可逆污染系数降到9%,通量恢复率提高到90.7%;随着接枝密度的增大,PP-g-PAA微孔膜抗污染性得到显著提升。A novel design of hydrophilic membrane was obtained through grafting polymerization of acrylic acid (AA)onto the surface of polypropylene microporous membrane.Fourier transform infrared (FT-IR)and scanning electron microscopy (SEM)spectrum were used to investigate the chemical composition and surface morphologies of PP-g-AA.The research basically included some influencing factors such as monomer type,concentration of photosensitizer and irradiation time.The effect of graft density of acrylic acid on the hydrophilicity and antifouling ability of polypropylene microporous membranes were discussed.The results showed that the total fouling (Rt)was decreased to 36.5%,the reversible fouling (Rr)was increased to 29%,correspondingly the irreversible fouling (Rir) was dropped to 9%and flux recovery ratio(FRR)was increased to 90.7%dramatically when the grafting density of membrane reached 1642.5μg/cm^2.The grafting density of membrane gave a great contribution for enhancing the hydrophilicity and improving the antifouling property of membrane.

关 键 词：聚丙烯微孔膜 丙烯酸 接枝密度 抗污染性 

分 类 号：TQ051.893[化学工程]