立方体型水滑石/蒙脱土基复合材料的制备及其在PBAT中的应用

Preparation of cubical hydrotalcite/montmorillonite composite and its application in PBAT

通过添加立方体型的水滑石/蒙脱土复合材料(LM)到聚己二酸/对苯二甲酸丁二酯(PBAT)中,制得热稳定性优良的聚己二酸/对苯二甲酸丁二酯复合膜(PBAT/LM)。对LM及复合膜的结构与性能进行了详细研究。结果表明:水滑石与蒙脱土的质量比为2:1时,LM呈现规则的立方形态,粒径分布集中在10~25μm;当LM添加量为3%时,LM立方体可均匀分散在PBAT基质中,同时,PBAT/LM_(21-3%)的热分解温度比原始PBAT提高了20℃,410℃以上基本没有热失重。因此,PBAT/LM复合膜在透明包装薄膜方面具有潜在的应用价值。

The polyadipate/butylene terephthalate(PBAT/LM)film with high thermostability was prepared by adding cubical hydrotalcite/montmorillonite(LM)composite into the PBAT polymer matrix.The structures and performances of LM and composite PBAT film were investigated in detail.Result shown that the LM composite had regularly cubical morphology with a size range of 10-25μm as the mass ratio of hydrotalcite and montmorillonite was 2:1.When the addition amount of LM was 3%,the LM cubes can be dispersed uniformly in the PBAT matrix.Furthermore,the thermal decomposable temperature of PBAT/LM21-3%was 20℃higher than that of the primitive PBAT and no obviously thermal weight loss was observed over 410℃.Therefore,the PBAT/LM composite material was a potential option in the application of the transparent packaging film.