摘要
用熔融共混的方法制备了碳纳米管(CNTs)/聚乳酸(PLA)复合材料,观察了其球晶形貌和断面形貌,并研究了不同配比的CNTs/PLA复合材料的结晶性能和水解性能。结果表明:CNTs可以作为异相成核剂提高PLA的结晶速率和结晶度,CNTs质量分数为1%时,复合材料的结晶度达到44.9%,CNTs能够在基体中均匀分散;CNTs质量分数小于1%时,断面呈中间层破形貌;随CNTs含量增多,复合材料的球晶直径变大;CNTs能降低PLA的水解速率。
Carbon nanotubes（CNTs）/poly（lactic acid）（PLA） composites were prepared by melt blending method.The morphology of spherulitic crystal and fracture was observed,and the crystallinity and the hydrolysis properties of CNTs/PLA composites with different ratios were studied.The results show that CNTs could act as heterogeneous nucleators and increase the crystallinity rate and degree of PLA,the crystallinity degree could reach 44.90% when CNTs content was 1wt%,and CNTs could disperse homogenously in matrix.The fracture took on mid-layer damage morphology when CNTs content was less than 1wt%,and the spherulitic crystal diameter of composite increased with the increase of CNTs content,CNTs could reduce the hydrolysis rate of PLA.
出处
《机械工程材料》
CAS
CSCD
北大核心
2012年第1期37-40,共4页
Materials For Mechanical Engineering
关键词
聚乳酸
碳纳米管
复合材料
性能
poly（lactic acid）（PLA）
carbon nanotube（CNT）
composite
property
