负载纳米银的埃洛石纳米管/聚醚砜杂化超滤膜的制备

以聚醚砜(PES)为膜材料，N, N-二甲基乙酰胺(DMAc)为溶剂，聚乙烯吡咯烷酮(PVP)和负载纳米银的埃洛石纳米管(Ag- HNTs)为添加剂，采用相转化法制备聚醚砜超滤膜。系统地考察了添加剂(Ag- HNTs)含量对膜性能的影响，并用抑菌圈试验研究了所制膜的抗菌效果。结果表明：硅烷偶联剂KH-792中的甲氧基与HNTs上的羟基成功地发生反应，并且接枝量为0.105g (KH-792)?g -1 (HNTs)；改性后的HNTs与Ag成功地发生络合反应，并且络合量近似为0.145g (Ag)?g -1 (HNTs)；溶剂中负载纳米银的埃洛石纳米管(Ag- HNTs)所占比例的增加能提高膜的水通量，而截留率保持在95%左右。所制备的膜对大肠杆菌和金黄色葡萄球菌有较强的抑制作用。

Preparation and antibacterial property of halloysite nanotube loaded with silver nanoparticles/polyethersulfone hybrid ultrafiltration membrane

Polyethersulfone(PES)ultrafiltration membrane was prepared via phase inversion,using PES as membrane material,N,N-dimethylacetamide(DMAc)as solvent,polyvinylpyrrolidone(PVP)and halloysite nanotube loaded with silver nanoparticles(Ag-HNTs)as additive.The effects of Ag-HNTs concentration in the casting solution dope on the membrane performance were examined.The antibacterial activity of the membrane was tested by an inhibition zone method.The experimental results indicated that the reaction between HNTs and silane coupling agent KH-792 took place successfully,and the grafted amount was 0.105 g KH-792·(g HNTs)-1.The complex reaction between silylated HNTs and Ag+ occurred successfully with a complex amount of approximately 0.145 g Ag·(g HNTs)-1.As the content of Ag-HNTs increased,pure water flux also increased whereas the rejection was kept at about 95%.In addition,the membrane showed good antibacterial property against E.coli and S.aureus.