基于银离子修饰的抗菌性复合聚丙烯腈超滤膜制备及性能研究OA

Polyacrylonitrile(PAN)was used as the raw material to obtain tetrazole-functionalized polyacrylonitrile(PAN-N)via click chemistry.PAN-N was then reacted with iodoethylamine,iodoethanol,iodoacetic acid,and chlorosulfonic acid,respectively,and modified ultrafiltration membranes were prepared by the phase inversion method.Antibacterial composite PAN ultrafiltration membranes were successfully obtained by chelating silver ions.The structure and morphology of the ultrafiltration membranes were characterized,and their pure water flux,rejection rate,antifouling performance,and antibacterial properties were systematically evaluated.The results showed that the flux recovery rates of PAN-N-NH2,PAN-N-OH,PAN-N-COOH,and PAN-N-SO3H were 86.8%,86.0%,88.3%,and 90.6%,respectively,and the total fouling indices was 59.1%,59.8%,57.8%,and 56.3%,respectively.While perfectly retaining the above-mentioned properties,the PAN-N-NH2-Ag+,PAN-N-OH-Ag+,PAN-N-COOH-Ag+,and PAN-N-SO3H-Ag+ultrafiltration membranes exhibited antibacterial activities against Staphylococcus aureus of 25.7%,26.9%,81.4%,and 87.6%,respectively,and inhibition rates against Escherichia coli of 28.5%,29.7%,81.8%,and 89.3%,respectively.The two silver-chelated ultrafiltration membranes,PAN-N-COOH-Ag+and PAN-N-SO3H-Ag+,demonstrated the optimal overall performance.