聚偏氟乙烯接枝改性膜的抗污染性能研究  

Study on the anti-pollution performance of poly(vinylidene fluoride)grafted membrane

作　　者：张志鹏[1] 华河林[1] 王林[1] 熊鹰[2,3] 李娜 

机构地区：[1]南昌航空大学环境与化学工程学院,南昌330036 [2]北京大学深圳研究生院,深圳518055 [3]中山朗清膜业有限公司,中山市新型功能材料研发中心,中山528437

出　　处：《化工新型材料》2016年第5期227-229,共3页New Chemical Materials

基　　金：国家自然科学基金(20906044);深圳市战略新兴产业发展专项资金(JCYJ20140417144423188);南昌航空大学研究生创新专项资金项目资助(YC2015011)

摘　　要：通过紫外辐射引发原子转移自由基聚合的方法制备了接枝率不同的聚偏氟乙烯接枝甲基丙烯酸甲酯膜(PVDF-g-PMMA),通过对牛血清蛋白(BSA)的过滤来检验膜的抗污染性能。结果显示,随着膜的MMA接枝率增加,膜的亲水性增加,对BSA的静态吸附量减少。接枝率为23.5%的PVDF-g-PMMA膜的吸附量为PVDF膜吸附量的1/2。膜自身阻力Rm和浓差极化边界层阻力Rc的和占总过滤阻力的78%以上,是导致亲水性接枝膜的膜通量降低的主要因素。随着膜接枝率的增加,Rm和Rc逐渐减小,且整个膜过滤阻力逐渐减小。A series of poly（vinylidene fluoride）grafted poly（methyl methacrylate）membranes with different grafting ratio were prepared via ultraviolet irradiation-induced atom transfer radical polymerization.The anti-pollution performance of membranes were tested by filtering BSA.The results indicated that the static adsorption capacity of PVDF-g-PMMA membrane for BSA decreased with the increasing of grafting ratio.The static adsorption capacity of PVDF-g-PMMA membrane with the grafting ratio 23.5% was the half of PVDF membrane.The membrane resistance Rmand the concentration polarization boundary layer resistance Rc were the main factors to cause the decrease of flux for the membranes.Because Rmand Rcadded up to more than 78% of the total filtration resistance.With the increasing of grafting ratio,Rmand Rcdecreased,and the membrane filtration resistance also decreased.

关 键 词：聚偏氟乙烯 牛血清蛋白 接枝改性膜 抗污染性能 

分 类 号：TQ051.893[化学工程]