聚乳酸／有机蒙脱土纳米复合材料的制备及结构表征  

Preparation and Characterization of Polylactic Acid/Organic-Montmorillonite Nanocomposites

作　　者：冯辉霞[1] 赵丹[1] 张国宏[1,2] 邱建辉 邵亮[1] 赵阳[1] 王毅[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]日本秋田县立大学系统科学技术学部,日本秋田015-0055

出　　处：《塑料工业》2009年第2期43-46,共4页China Plastics Industry

基　　金：甘肃省自然科学基金资助项目(3ZS062-B25-027)

摘　　要：采用二次插层法制备了CTAB2-Cu1-MMT(依次采用铜离子和十六烷基三甲基溴化铵改性后的蒙脱土),其层间距由1.415nm扩大到3.244nm。利用丙交酯和二次插层的蒙脱土采用原位聚合法制备了聚乳酸/有机蒙脱土纳米复合材料。采用红外、热分析、粉晶衍射等方法对复合材料进行表征,研究了蒙脱土的加入量对复合材料结构、热稳定性的影响。结果表明:聚乳酸插入到蒙脱土层间,其起始热分解温度由70℃提高到240℃,热稳定性能得到改善。Cetyhrimethylammonium Bromide and Cu^2＋ modified montmorillonite （CTAB2-Cu1-MMT）was prepared by secondly insert, and the interlayer spacing of organicmontmorillonite nanocomposites （OMMT） increased from 1. 415nm to 3. 244nm. An intercalated polylactide acid （PLA） /organic-montmorillonite was prepared by polymerization intercalation technique of lactide and secondly inserts MMT. The quantity of OMMT layer in nanocomposit structures and thermodynamic performance of nanoeomposits were characterized by infrared absorption spectroscopy （IR）, thermal analysis （TGA）, and X-Ray diffraction （XRD）. The results showed that the PLA could be inserted into the layer of OMMT, the initial thermal decomposition temperature of nanocomposits was increased from 70℃ to 240℃, and the thermodynamic performance of nanocomposits was improved.

关 键 词：聚乳酸 有机蒙脱土 纳米复合材料 插层 

分 类 号：TB383.1[一般工业技术—材料科学与工程]