Modification of Chitosan and its Polyelectrolyte Complex for Enhancing Antimicrobial Activity and Strength of Paper
(0) Chitosan is a natural polymer with a variety of interesting properties,such as antimicrobial activity,biodegradability and non-toxicity,which can bring added-value to paper products.However,the poor water-solubility of chitosan in neutral or alkaline pH limits its application.In the current work,chitosan with medium and low molecular weight were modified by grafting GTMAC (glycidyltrimethylammonium chloride).1H-NMR and FT-IRwere used to characterize the structure of the modified chitosan; the water solubility and charge density were also measured.More importantly,the work has been mainly focused on the polyelectrolyte complex(PEC)formation between the cationic-modified chitosan and the carboxyl methyl cellulose(CMC)with low and medium MW for enhancing the performance of paper products,antimicrobial activities in particular.Two methods,i.e.,MIC(minimuminhibitory concentration)and a shaking method were adopted to evaluate antimicrobial effects of the modified chitosan and PEC.It was found that a higher antimicrobial efficiency was achieved by the handsheets treated with PEC by L-b-L method although the MIC value of PEC was higher than that of modified chitosan.
chitosan cationic modification CMC antimicrobial polyelectrolyte complex MIC
LIYING QIAN RATTANA KITITERAKUN HUINING XIAO BEIHAI HE
State Key Lab of Pulp & Paper Eng.,South China University of Technology,Guangzhou,China Limerick Pulp & Paper Centre & Dept of Chem Eng.,University of New Brunswick,Fredericton,Canada State Key Lab of Pulp & Paper Eng.,South China University of Technology,Guangzhou,China;Limerick Pul
国际会议
第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)
天津
英文
702-706
2008-05-14（万方平台首次上网日期，不代表论文的发表时间）