文献类型：期刊文献

英文题名：Stable and efficient loading of silver nanoparticles in spherical polyelectrolyte brushes and the antibacterial effects

作者：Liu, Xiaochi[1];Xu, Yisheng[1,2];Wang, Xiaohan[1];Shao, Mingfei[3,4];Xu, Jun[1];Wang, Jie[1];Li, Li[1];Zhang, Rui[1];Guo, Xuhong[1,5]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Zhejiang Univ Sci & Technol, Sch Biol & Chem Engn, Zhejiang Prov Key Lab Chem & Biochem Proc Technol, Hangzhou 310023, Zhejiang, Peoples R China;[3]Harbin Inst Technol, Shenzhen Grad Sch, Shenzhen 518055, Guangdong, Peoples R China;[4]Shenzhen Key Lab Water Resource Utilizat & Enviro, Shenzhen 518055, Guangdong, Peoples R China;[5]Shihezi Univ, Key Lab Mat Chem Engn Xinjiang Uygur Autonomous R, Xinjiang 832000, Peoples R China

年份：2015

卷号：127

起止页码：148

外文期刊名：COLLOIDS AND SURFACES B-BIOINTERFACES

收录：;EI(收录号：20150700514496);WOS:【SCI-EXPANDED(收录号:WOS:000353001400020)】；

基金：We gratefully acknowledge the support of the National Natural Science Foundation of China (21306049, 51273063 and 21476143), the Fundamental Research Funds for the Central Universities8 (222201314029) and the Open Project of State Key Laboratory of Chemical Engineering (SKL-ChE-14C01) to this work.

语种：英文

外文关键词：Spherical polyelectrolyte brush; Poly(N-vinylcarbazole); Silver nanoparticles; Antibacterial

摘要：A more efficient and convenient strategy was demonstrated to immobilize silver nanoparticles (NPs) with a crystalline structure into the spherical polyelectrolyte brushes (SPB) as an antibacterial material. The SPB used for surface coating (Ag immobilized PVK-PAA SPB) consists of a poly(N-vinylcarbazole) (PVK) core and poly(acrylic acid) (PM) chain layers which are anchored onto the surface of PVK core at one end. Well-dispersed silver nanoparticles (diameter similar to 3.5 nm) then formed and were electrostatically confined in the brush layer. Ag content is controlled by a repeated loading process. Thin film coatings were then constructed by layer-by-layer depositions of positive charged poly(diallyldimethylammonium chloride) (PDDA) and SPB. The multilayer composites display excellent stability as well as antibacterial performance but not for simple PVK-PAA coated surface. The results show that almost complete bacteria growth including both dispersed bacterial cells and biofilms was inhibited over a period of 24 h. This approach opens a novel strategy for stable and efficient immobilization of Ag NPs in fabrication of antibacterial materials. (C) 2015 Published by Elsevier B.V.