【摘要】 以壳聚糖（CS）和结冷胶（GG）为原料，采用溶液流延法并结合层层自组装技术制备了CS/GG双层膜，通过单因素和响应面试验优化制备工艺条件，并对双层膜的微观形貌、化学结构、力学性能、光学性能、阻水性能和抗氧化性能进行评价。结果表明，CS质量分数1.7%、GG质量分数1.5%、CS与GG成膜液体积比4/6、甘油质量分数25%条件下双层膜的拉伸强度为38.83 MPa、透湿量为750.76 g/（m~2·d）；与单层膜相比，CS/GG双层膜表面光滑、截面致密，红外光谱分析结果表明双层膜具有良好的相容性；双层膜可以有效改善纯CS膜、纯GG膜的力学性能和阻水性能。更多还原

【Abstract】 Chitosan/gellan gum bilayer films were prepared using a solution flow‐casting method and a layer‐by‐layer self‐assembly technology,their optimum preparation conditions were determined by single factor and response surface tests,and their microstructure,chemical structure,mechanical properties,optical properties,water resistance and oxidation re‐sistance of the bilayer films were evaluated.The results indicated that the mass fractions of chitosan and gellan gum were determined to be 1.7 and 1.5 wt%,respectively,for the bilayer films.Moreover,the volume ratio of chitosan to gellan gum was 4/6,and the mass fraction of glycerol was 25 wt%in the bilayer films.Under these conditions,the bilayer films presented tensile strength of 38.83 MPa and moisture permeability of 750.76 g/（m~2·d).Compared to the single film,the bilayer films show a smooth surface and a compact cross section.Fourier‐transform infrared spectroscopic re‐sults indicated that the bilayer films had good compatibility and their mechanical properties and water resistance were im‐proved effectively compared to pure chitosan film and pure gellan gum film.更多还原