期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 251, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2020.117375
关键词
Nanocomposite membranes; Block copolymers; Silver nanoparticles; Biocidal activity
资金
- European Commission Education, Audiovisual and Culture Executive Agency (EACEA), under the program Erasmus Mundus Doctorate in Membrane Engineering, EUDIME (FPA) [2011-0014]
- Agence Nationale pour la Recherche [ANR-13-JS08-0008-01]
- Fundacao para a Ciencia e a Tecnologia [SFRH/BD/111150/2015]
- Fundacao para a Ciencia e Tecnologia/Ministerio da Educacao e Ciencia [iNOVA4Health-UID/Multi/04462/2013]
- FEDER under the PT2020 Partnership Agreement [iNOVA4Health-UID/Multi/04462/2013]
- Associate Laboratory for Green Chemistry LAQV - FCT/MCTES [UIDB/50006/2020]
- Agence Nationale de la Recherche (ANR) [ANR-13-JS08-0008] Funding Source: Agence Nationale de la Recherche (ANR)
- Fundação para a Ciência e a Tecnologia [SFRH/BD/111150/2015] Funding Source: FCT
Silver ions have been widely used because of their antimicrobial properties. This study describes the production of novel nanocomposite membranes from a block copolymer and silver nanoparticles (NPs). These composite membranes display properties from both polymeric and inorganic materials along with the biocidal features obtained due to the presence of silver ions. The spin coating technique is employed to synthesize the nanocomposite membrane consisting of positively charged inorganic NPs and negatively charged polymeric NPs. Polymeric NPs of spherical, wormicular, and vesicular morphologies were synthesized using Reversible addition-fragmentation chain transfer (RAFT) polymerization using poly(methacrylic acid)-b-(methyl methacrylate) di-block copolymer. The silver NPs coated with poly(methacrylic acid)-b-poly(quaternized 2-(dimethylamino)ethyl methacrylate), were synthesized using a nanoprecipitation method. The silver NPs act as the bridging entity between the polymeric NPs, as well as conferring the antimicrobial activity to the composite membranes. To test their antimicrobial properties, membranes were incubated with Enterococcus hirae. Comparison with the controls shows a 2 to 3 log decrease in the bacterial count for a contact time of 24 h. Furthermore, membrane filtration experiments conducted with phosphate buffer saline solutions spiked with bacteria indicated the importance of incorporating silver NPs in the nanocomposite membrane to achieve considerable rejection of bacteria as well as biocidal activity.
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