The double effects of silver nanoparticles on the PVDF membrane: Surface hydrophilicity and antifouling performance

• Published in: Applied surface science Vol. 265; pp. 663 - 670
• Main Authors: Li, Jian-Hua, Shao, Xi-Sheng, Zhou, Qing, Li, Mi-Zi, Zhang, Qi-Qing
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.01.2013; Elsevier
• Subjects: Antifouling; Antifouling performance; Antiinfectives and antibacterials; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Hydrophilicity; Membranes; Nanoparticles; Physics; Poly(acrylic acid) (PAA); Poly(vinylidene fluoride) (PVDF) membrane; Polyvinylidene fluorides; Silver; Silver nanoparticles; Solid-fluid interfaces; Structure and morphology; thickness; Surface chemistry; Surface hydrophilicity; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin film structure and morphology; Wetting; Antifouling performance; Poly(vinylidene fluoride) (PVDF) membrane; Surface hydrophilicity; Silver nanoparticles; Poly(acrylic acid) (PAA); Nanoparticles; Silver; Polymeric membrane; Antifoulants; Transition elements; Vinylidene fluoride polymer; Hydrophily
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2012.11.072

▸ Ag/PVDF-g-PAA composite membrane is firstly prepared. ▸ Silver nanoparticle provides PVDF membrane a significant improvement of surface hydrophilicity. ▸ Silver nanoparticle endows PVDF membrane with outstanding antifouling (anti-organic fouling and anti-biofouling) performance. In this study, silver nanoparticles were used to endow poly(vinylidene fluoride) (PVDF) membrane with excellent surface hydrophilicity and outstanding antifouling performance. Silver nanoparticles were successfully immobilized onto PVDF membrane surface under the presence of poly(acrylic acid) (PAA). The double effects of silver nanoparticles on PVDF membrane, i.e., surface hydrophilicity and anti-fouling performance, were systematically investigated. Judging from result of water static contact measurement, silver nanoparticles had provided a significant improvement in PVDF membrane surface hydrophilicity. And the possible explanation on the improvement of PVDF membrane surface hydrophilicity with silver nanoparticles was firstly proposed in this study. Membrane permeation and anti-bacterial tests were carried out to characterize the antifouling performance of PVDF membrane. Flux recovery ratio (FRR) increased about 40% after the presence of silver nanoparticles on the PVDF membrane surface, elucidating the anti-organic fouling performance of PVDF membrane was elevated by silver nanoparticles. Simultaneously, anti-bacterial test confirmed that PVDF membrane showed superior anti-biofouling activity because of silver nanoparticles. The above-mentioned results clarified that silver nanoparticles can endow PVDF membrane with both excellent surface hydrophilicity and outstanding antifouling performance in this study.