蒙脱石对挤压流延法制备淀粉膜性能的影响

The Effect of Montmorillonite on the Properties of Extrusion Casting Starch Films

对蒙脱石改善淀粉膜的性能进行研究。结果表明:添加蒙脱石后能有效改善淀粉膜的耐水性能,能够延缓膜的老化作用;随着蒙脱石添加量的增加,淀粉膜的抗拉强度和水溶解时间逐渐增大,而断裂伸长率逐渐降低。光学显微分析膜表面,添加蒙脱石后能使淀粉膜表面更加平整、光滑。蒙脱石添加量不宜超过3%,否则膜材变脆且热塑性淀粉的流动性过低。

The property of starch film improved by montmorillonite was studied.The result showed that;the water resistance of the films was improved effectively and the retrogradation of the films was delayed by adding montmorillonite .With the addition of montmorillonite increased,the tensile strength and water dissolution time gradually increased, while the elongation gradually decreased.The optical microscopy analysis of the film surface suggested that; the films surface became more flat and smooth by adding montmorillonite.The addition of montmorillonite was better less than 3%,otherwise the membrane became more brittle and the mobility of the thermoplastic starch was lower.