Characterization of half N-acetylated chitosan powders and films

• DOI: 10.1016/j.proeng.2011.12.511
• Publication Date: 2012-02-15T15:50:20Z
• Authors: Fang Feng; Yu Liu; Binyuan Zhao; Keao Hu
• Keywords: Thermal Stability; Elongation

The simple homogeneous N-acetylating reaction was developed for preparation of chitosans with various degree deacetylation (DDA). Water-soluble half N-acetylated chitosan powders were characterized by IR, CP/MAS-13CNMR, XRD and thermal analysis. results show the presents higher water hold capacity, lower crystallinity stability in contrast to original 91% DDA, which may be explained differences intermolecular hydrogen bonding. influences DDA on crystalline properties, mechanical swelling films studied XRD, Dynamic Mechanical Analyzer test, respectively. confirm index increase decreasing especially film showing instant solubility. tensile strength elongation at failure are found have correlation better failure. has possible layered structure. Special structure, solubility would helpful developing modification application methods medicine, packaging industry, or food processing.