文献类型：期刊文献

英文题名：Antimicrobial-modified sulfite pulps prepared by in situ copolymerization

作者：Guan, Yong[1]; Xiao, Huining[1,2]; Sullivan, Heather[1]; Zheng, Anna[3]

机构：[1]Univ New Brunswick, Dept Chem Engn, Fredericton, NB E3B 5A3, Canada;[2]S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou, Peoples R China;[3]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2007

卷号：69

期号：4

起止页码：688

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20072110615753);WOS:【SCI-EXPANDED(收录号:WOS:000247392200010)】；

语种：英文

外文关键词：cellulose fiber; in situ graft polymerization; guanidine polymer; AFM; antimicrobial

摘要：Grafting guanidine polymer (PHGH) onto cellulose fibers was conducted via in situ free-radical polymerization using ceric ammonium nitrate (CAN) as an initiator. The optimum reaction conditions were obtained, under which the grafting percentage and the grafting efficiency reached over 20% and 50%, respectively. Atomic force microscopy (AFM) images revealed that the grafted polymer tended to form grains with diameters ranging from 60 to 200 nm. AFM also enabled us to identify the location of the grafts on the surfaces of cellulose fibers by the measurements of the adhesion and attraction forces between a colloid probe and the samples. The cellulose fibers were rendered antimicrobial in the presence of 1.0% (wt) grafted polymer, and an excellent antimicrobial activity (over 99% inhibition) toward Escherichia coli was achieved. The AFM results also demonstrated that the antimicrobial mechanism of PHGH is to destroy the membrane of the cells. (c) 2007 Elsevier Ltd. All rights reserved.