摘要
利用AgNO_(3)能够一步还原成无机银纳米颗粒(AgNPs),通过邻苯二酚(CA)和聚乙烯亚胺(PEI)聚合产生的非特异性黏附将AgNPs固定在聚偏氟乙烯(PVDF)膜表面,使PVDF膜的亲水性和抗污染性得到极大改善,其初始水接触角达到14°;牛血清蛋白(BSA)的静态吸附实验显示了亲水性的涂层能有效减少BSA的吸附,而AgNPs的加入使得BSA的吸附量进一步减少;BSA的动态过滤实验进一步证明了膜的抗污性能,经BSA污染的改性膜在被简单清洗之后通量恢复率达到91.9%。此外,PEI和AgNPs赋予膜优异的抗菌性能,通过抑菌圈实验和活死细菌荧光染色实验分析表明:涂层膜对大肠杆菌和金色葡萄球菌的生长都具有优异的抑制作用。
Inorganic silver nanoparticles(AgNPs)were immobilized on the polyvinylidene fluoride(PVDF)membrane surface by non-specific adhesion generated by polymerization of catechol(CA)and polyethyleneimine(PEI)using the ability of AgNO_(3)to reduce to AgNPs in one step.The hydrophilicity of the PVDF membrane was greatly improved after CA and PEI coating and AgNPs fixation,with an initial water contact angle of 14°.Static adsorption experiments of bovine serum albumin(BSA)show that the hydrophilic coating could effectively reduce the adsorption of BSA,and the addition of AgNPs further could reduce the adsorption of BSA.Dynamic filtration experiments of BSA further demonstrates the anti-fouling performance of the membrane,and the BSA-contaminated membrane is cleaned briefly and then the flux recovery rate could reach 91.9%.In addition,the PEI and AgNPs provide the membrane excellent antibacterial performance,and the inhibition circle experiment and fluorescence staining of living and dead bacteria analysis show that the coated membrane has good inhibition effect on the growth of both E.coli and Staphylococcus aureus.
作者
顾梦琪
滕磊
张干伟
GU Mengqi;TENG Lei;ZHANG Ganwei(Jiangsu Province Engineering Research Center for Separation and Purification Materials and Technology,School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2023年第6期44-51,共8页
China Plastics Industry
基金
国家自然科学基金项目(51978433)
苏州市科技发展计划项目(SGC2021120)。
关键词
无机纳米
聚乙烯亚胺
膜亲水改性
抗污染
抗菌
Inorganic Nano
Polyethyleneimine
Hydrophilic Modified
Anti-pollution
Anti-bacterial
作者简介
顾梦琪,女,1997年生,硕士研究生,从事膜的制备以及其性能研究。863332539@qq.com;通信作者:张干伟,男,教授,从事环境功能材料,聚合物膜材料制备、改性及其在水处理方面的应用等研究。zhangganwei214036@126.com。
