title: Water-resistant cellulosic filter containing non-leaching antimicrobial starch for water purification and disinfection.
abstract: Water-resistant cellulose foam paper was developed in this work in an attempt to improve the antimicrobial activity of cellulose foam paper for capture and deactivation of pathogenic microorganisms existed in water. Results indicated that the cellulose foam paper could significantly improve household water quality by incorporating guanidine-based polymer modified with starch or called antibacterial thermoplastic starch (ATPS) into fibre network in the presence of proper amount of fiber fines. Ring diffusion testing demonstrated that no ATPS diffused around or underneath of samples, verifying that cellulose foam filter added by ATPS were of non-leaching type. Furthermore, the viability of bacteria before and after filtering and the structure of cellulose foam paper were analyzed via fluorescence microscopy and scanning electron microscopy images. The findings further proved the effectiveness of antimicrobial cellulose foam in deactivating pathogens, E.coli in particular.
authors.affiliation: Dept. of Chemical Eng., University of New Brunswick, Fredericton, NB, Canada; Pulp and Paper Technology, Asian Institute of Technology, Bangkok, Thailand.
authors.forename: Solmaz
authors.initials: S
authors.lastname: Heydarifard
authors.affiliation: Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China. Electronic address: panyf@gxu.edu.cn.
authors.forename: Yuanfeng
authors.initials: Y
authors.lastname: Pan
authors.affiliation: Dept. of Chemical Eng., University of New Brunswick, Fredericton, NB, Canada. Electronic address: hxiao@unb.ca.
authors.forename: Huining
authors.initials: H
authors.lastname: Xiao
authors.affiliation: Pulp and Paper Center, The University of British Columbia, Vancouver, BC, Canada.
authors.forename: Mousa
authors.initials: M
authors.lastname: M Nazhad
authors.affiliation: WHO Collaborating Centre for Water Supply, Asian Institute of Technology, Bangkok, Thailand.
authors.forename: Oleg
authors.initials: O
authors.lastname: Shipin
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D004203:Disinfection; D005374:Filtration; D013213:Starch / Q000737:chemistry*; D014867:Water; D018508:Water Purification
chemical_list: D000890:Anti-Infective Agents; D014867:Water; D002482:Cellulose; D013213:Starch
keywords: Antibacterial; Antibacterial thermoplastic starch; Cellulose foam paper; Guanidine polymer; Viability of bacteria; Water filter paper