原位微波合成官能化碳纳米管复合聚己内酯材料  

Microwave-Assistant in situ Synthesized Nanocomposites Based on Functional Carbon Nanotube-Modified Polycaprolactone

作　　者：黄海涛[1,2] 惠忠英[3] 陈云[1] 黄进[3,4] 

机构地区：[1]武汉大学基础医学院,湖北武汉430071 [2]武汉理工大学总医院,湖北武汉430070 [3]武汉理工大学化学工程学院,湖北武汉430070 [4]纳米技术及应用国家工程中心,上海200240

出　　处：《武汉大学学报（理学版）》2009年第3期263-267,共5页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(50843031);国家纳米重大科学研究计划项目(2009CB930000);国家重点实验室基金资助项目(T152802);武汉市青年科技晨光计划项目(200850731383)

摘　　要：氨基化碳纳米管被引入己内酯单体微波辅助开环聚合体系,一步制备出碳纳米管纳米复合聚己内酯材料.其中,碳纳米管表面的氨基引发己内酯单体聚合在碳纳米管表面形成聚己内酯接枝链.氨基化碳纳米管的引入明显提高了聚己内酯材料的强度和模量,甚至在低含量(<2%)时断裂伸长率也同时得到提高.利用扫描电镜、X射线衍射、示差扫描量热分析和动态力学分析揭示了纳米复合材料的断裂形貌、结晶情况和热性质,进而探讨了氨基化碳纳米管对提高力学性能的关键作用.The amino-functionalized carbon nanotubes were introduced into the microwave-assistant ring-open polymerization of caprolactone monomer, and then produced carbon nanotube-modified polycaprolactone nanocomposites in-situ. Meanwhile, the grafted polycaprolactone chains formed on the surface of carbon nanotubes due to the initiating polymerization of the amino groups onto carbon nanotubes. The addition of amino-functionalized carbon nanotubes resulted in the significant enhancement of strength and modulus. In addition, the elongation was enhanced even when the content of amino-functionalized carbon nanotube was lower than 2%. Thereafter, the fractured structures, crystalline and thermal properties of nanocomposites were investigated by scanning electron microscope, X-ray diffraction, differential scanning calorimetry and dynamic mechanical analysis, respectively. Furthermore, the key role of amino-functionalized carbon nanotubes in enhancing mechanical performances was discussed.

关 键 词：聚己内酯 碳纳米管 纳米复合材料 

分 类 号：TQ455[化学工程—农药化工]