论文部分内容阅读
A silver nanoparticles-poly(carboxybetaine methacrylate)(AgNPs-PCBMA) nanocomposite was prepared on poly(vinylidene fluoride)(PVDF) membrane surface to improve its hydrophilicity and antifouling properties. Firstly, the PVDF membranes were grafted by PCBMA via physisorbed free radical grafting technique. Then Ag+ coordinated to the carbonyl group on PCBMA andsubsequently was reduced to silver nanoparticles. The hydrophilicity of the PVDF-gPCBMA/Ag membrane wasenhanced with the increasing fixed degree(FD) of AgNPs, and the original water contact angle of membrane was reduced to 33.97°. Additionally, water flux recovery ratio(FRR) andbovine serum albumin(BSA) rejection ratio of PVDF-g-PCBMA/AgNPs membrane wereimproved from 52% to 93.32% and 28.12% to 91.12%, respectively. Further, the PVDF-g-PCBMA/AgNPs membranes exhibited the more pronounced inhibition zone. The study demonstrated that compared with pure AgNPs or the PCBMA polymer brush, the synergistic effect of PCBMA and AgNPs made PVDF membranes havebetter hydrophilicity and anti-bacterialperformances.
The silver nanoparticles-poly (carboxybetaine methacrylate (AgNPs-PCBMA) was prepared on poly (vinylidene fluoride) (PVDF) membrane surface to improve its hydrophilicity and antifouling properties. Firstly, the PVDF membranes were grafted by PCBMA via physisorbed free radical grafting technique. Then Ag + coordinated to the carbonyl group on PCBMA and reduced to silver nanoparticles. The hydrophilicity of the PVDF-gPCBMA / Ag membrane wasenhanced with the increasing fixed degree (FD) of AgNPs, and the original water contact angle of membrane was reduced to 33.97 °, respectively, Further, the water flux recovery ratio (FRR) andbovine serum albumin (BSA) rejection ratio of PVDF-g-PCBMA / AgNPs membrane wereimproved from 52% to 93.32% and 28.12% to 91.12%, respectively. -g-PCBMA / AgNPs membranes exhibited the more pronounced inhibition zone. The study demonstrated that compared with pure AgNPs or the PCBMA polymer brush, the synergistic effect of PCBMA and AgNPs made P VDF membranes havebetter hydrophilicity and anti-bacterial performance.