微波辅助原位熔融缩聚法制备聚乳酸/有机蒙脱土纳米复合材料  

Microwave assisted synthesis of PLA/OMMT nanocomposite by in situ melt polycondensation

作　　者：曹海雷[1,2] 王鹏[1,2] 李媛[1,2] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090 [2]哈尔滨工业大学市政环境工程学院绿色化学与技术研究中心,哈尔滨150090

出　　处：《化工新型材料》2010年第12期51-53,共3页New Chemical Materials

摘　　要：以微波为热源替代传统加热方式,采用原位熔融缩聚法制备出聚乳酸/有机蒙脱土纳米复合材料。有机蒙脱土的加入有利于聚乳酸分子链进入蒙脱土片层,当蒙脱土用量为1.5%时,微波辐射60 min所制得的聚乳酸/有机蒙脱土纳米复合材料与纯聚乳酸相比,拉伸强度提高近2倍,热失重中心温度提高7.3℃,对紫外线的屏蔽波段扩展了50nm以上。透射电镜(TEM)结果表明,有机蒙脱土以剥离态均匀分散于聚乳酸基体中。Microwave technology was firstly introduced to prepare PLA/OMMT nanocomposite by in situ melt polycondensation.The addition of OMMT was helpful for the intercalation of the polymer chain into the OMMT layers.The tensile strength of the PLA/OMMT nanocomposite prepared with 1.5% OMMT after 60 min microwave irradiation was effectively elevated about 2 times than that of the pristine PLA,and the central temperature of heating loss was heightened 7.3℃.Besides a better ultraviolet screening character was possessed with the help of evenly dispersed OMMT.The results of the TEM demonstrated that the OMMT was in an exfoliated structure in the polymer matrix.

关 键 词：微波辐射 聚乳酸纳米复合材料 原位熔融缩聚 有机蒙脱土 

分 类 号：TB383.1[一般工业技术—材料科学与工程]