以甘油作为增塑剂,经溶液流延法加工制备出 PVA/MMT 纳米复合薄膜,研究了纳米蒙脱土(MMT)对聚乙烯醇(PVA)的改性作用。通过对薄膜的结构表征、力学、光学、吸水性、热稳定性等性能研究表明,DK4型号 MMT 与 PVA 分子有着很好的相容性,添加了不同比例的 MMT 均不同程度提高了薄膜的抗拉强度、热稳定性,降低了薄膜的断裂伸长率、吸水性、水蒸气透过系数、透光率,其中添加了1％ DK4型MMT的PVA薄膜有着最好的改性效果。
To study the modified effects of montmorillonoid (MMT)on polyvinyl alcohol (PVA).This study used glycerol as a plasticizer to prepared PVA/MMT nanocomposite films through a solution casting method. By studying the properties of the flims,such as characterization,mechanics,optics,water absorption,thermal stability and so on showed that the DK4 model of MMT had a good consistency with PVA.And different pro-portions of MMT were added to the films increased its determination of tensile strength and thermal stability, but reduced its elongation at break,water absorption,water vapor permeability,light transmittance.The ex-periment results showed that the PVA films added with 1% MMT had good modified effects.
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