【摘要】 壳聚糖通过羧甲基化得到水溶性N,O羧甲基壳聚糖,并将其配制成4Wt%水溶液,与4Wt%明胶水溶液共混,成功制得了羧甲基壳聚糖/明胶共混膜。采用红外光谱、X射线衍射、扫描电镜对共混膜进行结构表征,结果表明,共混膜中羧甲基壳聚糖和明胶分子间存在着较强的相互作用及良好的相容性。通过共混膜的力学性能测试,发现当羧甲基壳聚糖含量为20%时,共混膜的抗张强度达到最大值(75MPa),分别比单独的羧甲基壳聚糖(45MPa)和明胶(43MPa)提高了66.7%和74%。经过吸湿和保湿性能测试,发现当羧甲基壳聚糖含量为80%时,吸湿率和保湿率分别为33.4%和69.2%,比单独的明胶膜分别提高了1.8倍和2.1倍。更多还原

【Abstract】 N,O-carboxymethyl chitosan/gelatin blend films were successfully prepared by solution method and characterized by FTIR,XRD and SEM. The results indicated that there was some strong interaction and good compatibility between N,O-carboxymethyl chitosan and gelatin molecular in the blend films. According to the measurements of mechanical properties, when the content of N,O-carboxymethyl chitosan was 20 weight%, the tensile strength ( δ _b ) in dry state of the blend film was enhanced by 67.7% and 74%,compared to the N,O-carboxymethyl chitosan film and the gelatin film,respectively. The blend films were proved to have good moisture-absorption and moisture-retention abilities by the test.更多还原