title: Preparation of microfibrillated cellulose/chitosan-benzalkonium chloride biocomposite for enhancing antibacterium and strength of sodium alginate films.
abstract: The nonantibacterial and low strength properties of sodium alginate films negatively impact their application for food packaging. In order to improve these properties, a novel chitosan-benzalkonium chloride (C-BC) complex was prepared by ionic gelation using tripolyphosphate (TPP) as a coagulant, and a biocomposite obtained through the adsorption of C-BC complex on microfibrillated cellulose, MFC/C-BC, was then incorporated into a sodium alginate film. The TEM image showed that the C-BC nanoparticles were spherical in shape with a diameter of about 30 nm, and the adsorption equilibrium time of these nanoparticles on the surface of MFC was estimated to be 6 min under the driving forces of hydrogen bonds and electrostatic interactions. According to the disc diffusion method, the MFC/C-BC biocomposite-incorporated sodium alginate film exhibited remarkable antibacterial activity against Staphylococcus aureus and certain antibacterial activity against Escherichia coli . The strength tests indicated that the tensile strength of the composite sodium alginate film increased about 225% when the loading of MFC/C-BC biocomposite was 10 wt %. These results suggested that the MFC/C-BC biocomposite-incorporated sodium alginate film with excellent antibacterial and strength properties would be a promising material for food packaging, and the MFC/C-BC may also be a potential multifunctional biocomposite for other biodegradable materials.
authors.affiliation: College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Liu
authors.forename: Xinxing
authors.initials: X
authors.lastname: Lin
authors.forename: Lihui
authors.initials: L
authors.lastname: Chen
authors.forename: Liulian
authors.initials: L
authors.lastname: Huang
authors.forename: Shilin
authors.initials: S
authors.lastname: Cao
authors.forename: Huangwei
authors.initials: H
authors.lastname: Wang
mesh_terms: D000464:Alginates / Q000737:chemistry; D001548:Benzalkonium Compounds / Q000737:chemistry*; D063566:Biodegradable Plastics / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D055598:Chemical Phenomena; D048271:Chitosan / Q000737:chemistry*; D004202:Disinfectants / Q000737:chemistry*; D018857:Food Packaging; D005519:Food Preservation; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D055595:Mechanical Phenomena; D036103:Nanotechnology / Q000379:methods
chemical_list: D000464:Alginates; D001548:Benzalkonium Compounds; D063566:Biodegradable Plastics; D004202:Disinfectants; D006603:Hexuronic Acids; D020723:Glucuronic Acid; D002482:Cellulose; D048271:Chitosan