纳米氧化锌改性聚偏氟乙烯超滤膜的性能  

Characteristic of polyvinylidene fluoride ultrafiltration membrane modified by nano-zinc oxide

作　　者：龚烨霞 左行涛[1] 张事 周曌 胡波[1] 

机构地区：[1]华中农业大学资源与环境学院生态环境系,武汉430000 [2]珠海格力电器股份有限公司,珠海519000

出　　处：《环境工程学报》2017年第7期4091-4096,共6页Chinese Journal of Environmental Engineering

基　　金：中央高校基本科研业务费专项(2662017JC019);湖北省自然科学基金资助项目(2016CFB495)

摘　　要：采用共混法制备了纳米ZnO改性聚偏氟乙烯(PVDF)超滤膜,考察纳米ZnO添加量对聚偏氟乙烯膜性能的影响。膜性能测定数据表明,适量纳米ZnO(1.5%~2.0%)的添加使膜孔径增大了53.91%,膜纯水通量提高了77.01%。同时,膜接触角随着纳米ZnO添加而降低,从89.3°逐渐减小到77.9°;衰减系数减小了48.84%,膜阻降低了76.62%,PVDF-ZnO超滤膜对牛血清白蛋白(BSA)的截留率稳定在90%以上。以大肠杆菌为代表的PVDF-ZnO膜抑菌性能测试结果表明,随着纳米ZnO添加量的增加,PVDF-ZnO膜抑菌率相应增加,尤其在纳米ZnO质量分数为3.0%时抑菌率高达62.9%,显著提高PVDF膜的抗菌效果。The performance of PVDF ultrafihration membranes prepared with different ZnO weight ratios via blending was investigated. Experimental data showed that optimal addition of ZnO （ 1.5% to 2.0% ） increased membrane pore size and water flux by 53.91% and 77.01% , respectively. Meanwhile, membrane contact angle decreased from 89.3° to 77.9° with increasing nano-ZnO content in membrane-forming materials. Compared to the original PVDF membrane,the flux reduction coefficient and the membrane resistance of the PVD-ZnO mem- brane decreased by 48.84% and 76.62% ,respectively. BSA retention of PVDF membranes modified with nano- ZnO was stable at 90% with further addition of ZnO. The antibacterial capacity of the PVDF-ZnO membrane in the presence of Escherichia coli was also studied,with results indicating that incorporation of nano-ZnO into the PVDF membrane phase led to an improved antibacterial rate. Most notably, at 3.0% ZnO, this was as high as 62.9%.

关 键 词：超滤膜 聚偏氟乙烯 纳米氧化锌 膜性能 抑菌 

分 类 号：X703.1[环境科学与工程—环境工程]