title: Preparation of water soluble chitosan by hydrolysis using hydrogen peroxide.
abstract: Chitosan is not soluble in water, which limits its wide application particularly in the medicine and food industry. In the present study, water soluble chitosan (WSC) was prepared by hydrolyzing chitosan using hydrogen peroxide under the catalysis of phosphotungstic acid in homogeneous phase. Factors affecting hydrolysis were investigated and the optimal hydrolysis conditions were determined. The WSC structure was characterized by Fourier transform infrared spectroscopy. The resulting products were composed of chitooligosaccharides of DP 2-9. The WSC content of the product and the yield were 94.7% and 92.3% (w/w), respectively. The results indicate that WSC can be effectively prepared by hydrolysis of chitosan using hydrogen peroxide under the catalysis of phosphotungstic acid.
authors.affiliation: School of Marine Science and Technology, Huaihai Institute of Technology, 59 Cangwu Road, Xinpu 222005, China.
authors.forename: Zhenqiang
authors.initials: Z
authors.lastname: Xia
authors.forename: Shengjun
authors.initials: S
authors.lastname: Wu
authors.forename: Jinhua
authors.initials: J
authors.lastname: Chen
mesh_terms: D002384:Catalysis; D048271:Chitosan / Q000031:analogs & derivatives* / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006868:Hydrolysis; D015394:Molecular Structure; D010772:Phosphotungstic Acid / Q000737:chemistry*; D012995:Solubility; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water
chemical_list: D014867:Water; D010772:Phosphotungstic Acid; D048271:Chitosan; D006861:Hydrogen Peroxide