title: Preparation and characterization of microwave-treated carboxymethyl chitin and carboxymethyl chitosan films for potential use in wound care application.
abstract: CM-chitin and CM-chitosan films were successfully crosslinked by microwave treatment. Crosslinking of the microwave-treated CM-chitin films involved mainly the carboxylate and the secondary alcohol groups, while crosslinking of microwave-treated CM-chitosan films involved the carboxylate and the amino groups. In addition, the crystallinity of CM-chitin increased with increasing microwave treatment time, whereas an increase in the crystallinity of the microwave-treated CM-chitosan films was not observed. At a similar percentage of weight loss, the crosslinking of either CM-chitin or CM-chitosan films by microwave treatment required much less stringent condition when compared with the crosslinking by autoclave treatment. Based on both direct and indirect cytotoxicity assays, the cytotoxicity of the microwave-treated CM-chitin films was negative, while that of the microwave-treated CM-chitosan films was positive. Human fibroblasts adhered on the surface of microwave-treated CM-chitosan films much better than on the surface of microwave-treated CM-chitin films.
authors.affiliation: Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Panya
authors.initials: P
authors.lastname: Wongpanit
authors.forename: Neeracha
authors.initials: N
authors.lastname: Sanchavanakit
authors.forename: Prasit
authors.initials: P
authors.lastname: Pavasant
authors.forename: Pitt
authors.initials: P
authors.lastname: Supaphol
authors.forename: Seiichi
authors.initials: S
authors.lastname: Tokura
authors.forename: Ratana
authors.initials: R
authors.lastname: Rujiravanit
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D002448:Cell Adhesion; D002478:Cells, Cultured; D002686:Chitin / Q000031:analogs & derivatives* / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry*; D005347:Fibroblasts; D005881:Gingiva / Q000166:cytology; D006801:Humans; D007739:L Cells; D051379:Mice; D008872:Microwaves; D033561:Penaeidae / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014945:Wound Healing
chemical_list: D001672:Biocompatible Materials; D002686:Chitin; C044872:O-(carboxymethyl)chitin; D048271:Chitosan