title: Carboxymethyl chitosan/clay nanocomposites and their copper complexes: Fabrication and property.
abstract: To obtain environmentally friendly antifouling agent, an effort was made to intercalate carboxymethyl chitosan into the interlayer of organic montmorillonite to prepare carboxymethyl chitosan/organic montmorillonite nanocomposites and their copper complexes. In comparison, carboxymethyl chitosan-copper complexes were also obtained. Their structures were characterized by X-ray diffaraction, transmittance electron microscopy and Fourier transform infrared, and their thermal behavior and antimicrobial activity were discussed. The results revealed that the interlayer distance of carboxymethyl chitosan/organic montmorillonite nanocomposites enlarged with the increasing mass ratio of carboxymethyl chitosan to organic montmorillonite, when the mass ratio was at 20:1, the layer spacing of carboxymethyl chitosan/organic montmorillonite nanocomposites reached the maximum of 3.68 nm. As compared to other samples, carboxymethyl chitosan/organic montmorillonite-copper nanocomposites showed much higher thermal stability and inhibitory activity against Escherichia coli, the lowest minimum inhibition concentration was only 0.0003125% (w/v). The study provides a new method to find novel antifouling agent.
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Yongcan
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of SUN Yat-sen University, Guangzhou 510630, China. Electronic address: sallot33@hotmail.com.
authors.forename: Jiancong
authors.initials: J
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Jihai
authors.initials: J
authors.lastname: Cai
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Wensheng
authors.initials: W
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Qixuan
authors.initials: Q
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Fangchengyuan
authors.initials: F
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China; China Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China. Electronic address: holdit@126.com.
authors.forename: Jiwen
authors.initials: J
authors.lastname: Luo
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology; D048271:Chitosan / Q000031:analogs & derivatives* / Q000737:chemistry; D000077215:Clay; D003300:Copper / Q000737:chemistry*; D004355:Drug Stability; D004926:Escherichia coli / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D008970:Molecular Weight; D053761:Nanocomposites / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry* / Q000494:pharmacology*; D013696:Temperature
chemical_list: D000538:Aluminum Silicates; D000900:Anti-Bacterial Agents; D009942:Organometallic Compounds; C514968:carboxymethyl-chitosan; D003300:Copper; D048271:Chitosan; D000077215:Clay
keywords: Antibacterial property; Carboxymethyl chitosan; Clay; Copper complexes