图10
图11
图12给出了屏蔽效果作为粘土含量的函数。由图12可知，粘土含量从5%增加到10%时，紫外线透射率显著减小，然而透明度却很高（图11）。UV-A 和UV-B 也会减少，UV-B减小的相对较少。
使用DMSO夹层高岭石对保护透明性有利，甚至有良好的阻隔紫外线能力。
图12
6.结论
在这项研究中，对高岭石含量对木薯淀粉薄膜性能的影响进行了研究。使用DMSO夹层高岭石对粘土的扩散和分布是有利的，这会增强粘土含量对薄膜性能的影响。动态机械热分析(DMTA)显示，当粘土含量达到10%时，玻璃化的转变温度（Tg）会降低。通过减少聚合物链之间的相互作用，促进它们的流动性，粘土有增塑剂的作用。使用DMSO夹层高岭石会使Tg变得更低，这是由于它对链-链相互作用的强干扰导致的。从差示扫描量热法(DSC）可知，淀粉基体的热解温度会
随粘土含量增加而增加，粘土含量上限为10%。
此外，薄膜在100%和50%的相对湿度下水摄入量（WU）的结果表明，在低相对湿度下，粘土含量对WU起到阻碍作用，然而高相对湿度下，对聚合物薄膜的WU起到促进作用。
添加夹层高岭石的薄膜的透明性降低值相对较少，当粘土含量在2%到6%时，具有显著紫外光阻隔效果，同时会保持透明度。
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