Preparation and Characterization of Two New Kinds of Soluble Quaternary Ammonium Salts of Chitosan
Schiff base of chitosan was obtained by the reaction of chitosan and aromatic aldehyde, and then Schiff base of chitosan reacted with methyl iodide to get soluble quaternary ammonium salts of chitosan which were N-metoxybenzenemethyl quaternary ammonium salt of chitosan (NM- Chitosan) and N-hydroxybenzenemethyl quaternary ammonium salt of chitosan(NH-Chitosan). The obtained chitosan derivatives were characterized by Infrared Spectra Analysis(FT-IR), Nuclear Magnetic Resonance Spectroscopy(1H NMR) and elemental analysis. Quantitative analysis showed that there was small difference between degrees of quaternization(DQ) and degrees of substitution(DS), and the solubility of chitosan derivatives was demonstrated to be better in the organic solvents.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
L. J. Tan et al., "Preparation and Characterization of Two New Kinds of Soluble Quaternary Ammonium Salts of Chitosan", Advanced Materials Research, Vols. 239-242, pp. 496-500, 2011