摘要
利用丙交酯的开环聚合反应成功地制备了单壁碳纳米管/聚乳酸复合材料,研究了其降解性和热稳定性。通过红外光谱(FTIR)、Raman光谱、热失重分析(TGA)和扫描电子显微镜(SEM)研究,证明乙二醇功能化的单壁碳纳米管能够参与丙交酯的开环聚合反应,并在碳纳米管侧壁成功接枝聚乳酸链,得到的复合材料在碱性溶液中容易降解。差示热分析(DSC)表明,功能化单壁碳纳米管/聚乳酸复合材料的玻璃化转变温度与纯聚乳酸相比有所提高。
Ring-opening polymerization of L-lactide was successfully used to prepare single-walled carbon nanotube/poly(L-lactide)(SWCNTs/PLA) composites,and its degradability and thermal stability were explored.Fourier transform infrared(FTIR) spectra,Raman spectra,thermogravimetric(TGA) analysis and scanning electron microscopy were used to characterize the products.The results show that ring-opening polymerization takes place between the functionalized SWCNTs and L-lactide,resulting in attachment of poly(L-lactide)(PLA) chains to SWCNTs,and the SWCNTs/PLA composites can be hydrolyzed under alkaline solution.The DSC study suggests that the presence of functionalized SWCNTs can enhance the glass transition temperature(Tg) of the composite campared with pure PLA.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2011年第1期26-30,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(50772011)
湖北省自然科学基金重点项目(创新群体)(2009CDA021)
关键词
单壁碳纳米管
聚乳酸
复合材料
开环聚合反应
single-walled carbon nanotubes
poly(L-lactide)
composites
ring-opening polymerization