高通量强抗菌纳米氧化锌/聚醚砜膜研究
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摘要
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 of nano ZnO was 4%, the pure water flux of Zn O/PES increased to 561 L/(m~2·h), the fouling index was 1 629 s/L~2, the attenuation coefficient of pure water flux was low to 0.25, and the hydrophilicity of the ZnO/PES membrane increased. Meanwhile, the addition of Zn O in the membrane phase did not affect the BSA rejection, and the rejection rate was higher than 97%. 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 Zn O content. Especially, when the mass fraction of Zn O was more than 8%, the antibacterial rate of ZnO/PES membranes reached 100%. The ZnO/PES membranes with better separation performance and antifouling properties can be used for water treatment.
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 of nano ZnO was 4%, the pure water flux of Zn O/PES increased to 561 L/(m~2·h), the fouling index was 1 629 s/L~2, the attenuation coefficient of pure water flux was low to 0.25, and the hydrophilicity of the ZnO/PES membrane increased. Meanwhile, the addition of Zn O in the membrane phase did not affect the BSA rejection, and the rejection rate was higher than 97%. 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 Zn O content. Especially, when the mass fraction of Zn O was more than 8%, the antibacterial rate of ZnO/PES membranes reached 100%. The ZnO/PES membranes with better separation performance and antifouling properties can be used for water treatment.
引文
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[2]黄星.共混改性制备抗菌性耐污染聚醚砜超滤膜的研究[D].青岛:中国海洋大学,2014.
[3]BALTA S,SOTTO B,LUIS P.A New Outlook on Me mbrane enhancement with nanoparticles:The alternative of ZnO[J].Journal of Membrane Science,2012,389:155-161.
[4]SHEN L,BIAN X,LU X,SHI L.Preparation and characterization of ZnO/polyethersulfone(PES)hybrid membranes[J].Desalination,2012,293:21-23.
[5]曲敏丽,姜万超.纳米氧化锌抗菌机理探讨[J].印染助剂,2004,21(6):46-47.
[6]和树立,杨琦,姜艳峰,等.氧化铝凝胶改性聚偏氟乙烯超滤膜的制备与表征[J].工业催化,2017,25(2):77-80.
[7]DHANALAKSHMIA C A,PALANIMURUGANB B,NATARAJANC.Enhanced antibacterial effect using carbohydrates biotemplate of ZnO nano thin films[J].Carbohydrate Polymers,2017,168(15):191-200.
[8]HAJIBEYGIA M,SHABANIANB M,OMIDI-GHALLEMOHAMADIAM,et al.Optical,thermal and combustion properties of self-colored polyamide nanocomposites reinforced with azo dye surface modified ZnO nanoparticles[J].Applied Surface Science,2017,416(15):628-638.
[9]RAJABIA H,NEAEMIC,SAYED S,et al.Nano-sized Zn O embedded mixed matrix polyethersulfone(PES)membrane:Influence of nanofiller shape on characterization and fouling resistance[J].Applied Surface Science,2015,349:66-77.
[10]龚烨霞,左行涛,张事,等.纳米氧化锌改性聚偏氟乙烯超滤膜的性能[J].环境工程学报,2017,11(7):4091-4096.
[11]申立国.聚醚砜(PES)膜改性及抗污染性能研究[D].北京:中国科学院大学,2014.
[12]ZHAO S,YAN S,SHI M,et al.Improving permeability and antifouling performance of polyethersulfone ultrafiltration membrane by incorporation of ZnO-DMF dispersion containing nano-sized ZnO and polyvinylpyrrolidone[J].Journal of Membrane Science,2015,478:105-116.
[13]SCHIPPERS J C,VERDOUW J.The modified fouling index,a method of determining the fouling characteristics of water[J].Desalination,1980,32:137-148.
[14]姜万超.纳米氧化锌的制备、改性及其在纺织品上的抗菌应用研究[D].青岛:青岛大学,2002.