CHITOSAN-GUANIDINE POLYMERS FOR SIMULTANEOUS WET-STRENGTH AND ANTIMICROBIAL IMPROVEMENT
Hygiene paper products, including napkins, tissue, paper towels, kitchen towels and food packaging, require both wet-strength and antimicrobial activities during applications. It is a common practice to use wet strength polymers to enhance the wet strength of paper during applications or the wet-web strength over papermaking processes. However, none of existing wet-strength additives could render paper antimicrobial. On the other hand, the guanidine-based polymers have been found to perform extremely well in deactivating various bacteria for paper products, but contribute little to the wet strength. The research conducted in this work was aimed at developing functional polymer systems or complexes, thus enabling to improve the wet-strength and antimicrobial activity of paper simultaneously. Various guanidine-based polymers, including those with the long chains extension, were synthesized. The resulting antimicrobial polymers were then mixed with chitosan in an acetic acid aqueous solution in the presence of sodium tripolyphosphate as a crosslinking agent. In fact, two polymers form the complex particles, in which, chitosan appears to play the role as carriers for antimicrobial polymers and promoter for forming fibre-polymer networks. As a result, the significant synergistic effect on improving both wet-strength and antimicrobial activities of hand-sheets was achieved. In comparison with the control sample, the wet/dry strength ratio of hand-sheets treated with the complexes was increased from 2.65 ％ up to 23.3 ％. Meanwhile, the treated cellulose fibres exhibited an excellent antibacterial activity against E. coli and S.aureus. In addition, the guanidine polymers included in the complexes was successfully released, as monitored with UV spectroscopy. The antimicrobial mechanism of the complexes was further revealed using an AFM.
chitosan guanidine polymer complex Wet-Strength
Sun Shengling An Qiaozhi Li Xu Qian Liying He Beihai Xiao Huining
State Key Laboratory of Pulp and Paper Eng. & College of Food Sci., South China University of Techno State Key Laboratory of Pulp and Paper Eng. & College of Food Sci., South China University of Techno Department of Chemical Engineering and Limerick Pulp and Paper Centre, University of New Brunswick,F
国际会议
广州
英文
1457-1460
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）