高通量强抗菌纳米氧化锌/聚醚砜膜研究

Study on Nano ZnO-Polyethersulfone Membrane with High Flux and Strong Antibacterial Properties

采用聚乙烯吡咯烷酮和纳米氧化锌(ZnO)与聚醚砜(PES)共混制备ZnO/PES膜,考察纳米ZnO的添加对PES膜的性能影响。结果表明,当添加质量分数4%的纳米ZnO时,ZnO/PES膜的纯水通量达到561 L/(m^2·h),污染指数为1 629 s/L^2,纯水通量衰减系数低至0.25,膜亲水性显著增强。同时,ZnO的添加不影响ZnO/PES膜对牛血清白蛋白(BSA)的拦截,其值稳定在97%以上。对大肠杆菌的抗菌实验结果表明,ZnO/PES膜的抗菌率随着纳米ZnO用量的增加而上升。尤其在纳米ZnO的质量分数≥8%达到100%的抑菌率。ZnO/PES膜具有良好的分离性能和抗微生物污染性能,可用于水处理工艺。

ZnO/polyether-sulfone(PES)membrane was prepared by polyvinyl-pyrrolidone(PVP)and ZnO nanoparticles blend with PES.The effect of nano ZnO addition on the performance of ZnO/PES membranes was investigated.The results showed that at,when the addition mass fraction ofnano ZnO was4%,the pure water flux of ZnO/PES increased to561L/(m^2.h),the fouling index was1629s/L^2,the attenuation coefficient of pure water flux was low to0.25,and the hydrophilicity of the ZnO/PES membrane increased.Meanwhile,the addition of ZnO in the membrane phase did not affect the BSA rejection,and the rejection rate was higher than97%.The result of the research on the bacterial growth of E.coli on ZnO/PES membrane showed that the antibacterial rate increased with the increase of nano ZnO content.Especially,when the mass fraction of ZnO was more than8%,the antibacterial rate of ZnO/PES membranes reached100%.The ZnO/PES membranes with better separation performance and antifouling properties can be used for water treatment.