中心组合试验优化葛根淀粉-壳聚糖复合膜性能

Optimization of Properties of Chitoan-Kudzu Starch Blend Films

利用玻璃板延流法制取葛根淀粉-壳聚糖复合膜,运用流变仪、质构仪等仪器测定葛根淀粉、壳聚糖、甘油不同配比下复合膜的成膜特性,并通过响应面法分析和优化3种物料的配比。结果表明,以抗拉强度、延伸率、水蒸气透过率和透明度为评价指标,通过Design-Expert软件分析得到在葛根淀粉质量分数1.5%,壳聚糖质量分数1.29%,甘油质量分数24.27%时,葛根淀粉-壳聚糖复合膜的性能最好。

Chitosan-kudzu starch blend films were prepared by casting on a glass plate in the present study. Film-forming properties of blend films composed of different proportions of kudzu starch, chitosan and glycerol were examined with a rheometer and a texture analyzer. Furthermore, response surface methodology was applied to optimize film composition using the software Design-expert. Edible films consisting of 1.5% kudzu starch, 1.29% chitosan and 24.27% glycerol showed the best properties of tensile strength, elongation at rupture, water vapor permeability （WVP） and opacity.