中国塑料 ›› 2011, Vol. 25 ›› Issue (06): 42-48 .DOI: 10.19491/j.issn.1001-9278.2011.06.009

• 材料与性能 • 上一篇    下一篇

PLA/HTCC-MMT插层复合材料的绿色合成、表征及热降解动力学分析

汪凌 甄卫军 李亚瑜 刘月娥 庞桂林   

  1. 新疆大学化学化工学院 新疆大学化学化工学院
  • 收稿日期:2011-02-21 修回日期:2011-05-09 出版日期:2011-06-26 发布日期:2011-06-26

Green Synthesis, Characterization and Thermal Degradation Kinetics of PLA/MMTHTCC Nanocomposites

ling WANG ZHEN Wei-jun yayu Li yuee liu guilin Pang   

  • Received:2011-02-21 Revised:2011-05-09 Online:2011-06-26 Published:2011-06-26
  • Contact: ZHEN Wei-jun

摘要: 以乳酸锌为绿色催化剂,采用丙交酯开环聚合法制备了聚乳酸/壳聚糖季铵盐改性蒙脱土(PLA/MMTHTCC)纳米复合材料。通过红外光谱、X射线衍射(XRD)、热重分析、扫描电子显微镜和透射电子显微镜进行了表征,采用Kissinger法和Ozawa法进行热降解动力学分析,得到材料的表观活化能。结果表明,PLA/MMTHTCC为插层型纳米复合材料, PLA/MMTHTCC的热分解峰值温度(Tp)比PLA最多高35.18 ℃,通过MMTHTCC插层的实现,材料的热分解活化能得到了提高,从而提高了其热稳定性。

关键词: 聚乳酸, 绿色合成, 插层复合材料, 表征, 热降解动力学

Abstract: PLA and PLA/MMTHTCC nanocomposites were synthesized via ringopening polymerization with zinc lactate as a green catalyst. The composite was characterized using FTIR spectrum, Xray diffraction (XRD), TG analysis ,scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The thermal degradation kinetics was analyzed using Kissinger′s method and Ozawa′s method, and the apparent activation energy was obtained. Because a fraction of PLA was intercalated into MMTHTCC, the PLA/MMTHTCC composite possessed a higher thermal degradation activation energy than that of neat PLA, the peak temperature of thermal decomposition of PLA/MMTHTCC was 35.18 ℃ higher.

Key words: poly lactic acid, green synthesis, intercalation composites, Characterization, thermal degradation