CNFs的掺杂与取向对CNFs/LDPE纳米复合材料结晶性能的影响  

Influence of CNFs Incorporation and Orientation on Crystallization Property of CNFs/LDPE Nanocomposites

作　　者：郑丽娜[1] 郝春成[2] 

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042 [2]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《塑料制造》2011年第12期67-68,71,共3页Plastics Manufacture

基　　金：国家自然科学基金项目(51077075);山东省中青年科学家科研奖励基金项目(2007BS04003);山东省教育厅科技发展计划项目(J07YA11-1);电力设备电气绝缘国家重点实验室资助项目(EIPE10207)

摘　　要：通过微波法化学镀镍对纳米碳纤维(CNFs)进行表面改性,采用熔融共混法制备CNFs/低密度聚乙烯(LDPE)纳米复合材料,在模压硫化过程中施加磁场,实现表面镀镍CNFs在LDPE基体中的取向,研究了CNFs的掺杂对CNFs/LDPE纳米复合材料结晶性能的影响,采用场发射扫描电子显微镜(FE-SEM)观察刻蚀后样品中CNFs分散、取向情况和球晶形貌,采用X射线衍射仪(XRD)分析纳米复合材料结晶性能。研究发现,在LDPE基体中CNFs的掺杂对纳米复合材料结晶性能有着较大的影响;掺杂CNFs使LDPE的结晶度下降,且掺杂样品需较长时间的刻蚀才能看到清晰的球晶结构,LDPE的球晶结构较明显,其直径约6μm,CNTs的取向使纳米复合材料的结晶度增大。The surface of carbon nanofibers （CNFs） were modificated by microwave assisted chemical nickel plating, the CNFs/LDPE nanocomposites were prepared by melt-compounding of the modfied CNFs and LDPE resin. The magnetic field was used during the modeling process and the CNFs were oriented in the LDPE matrix. The influence of CNFs on the crystallization behavior of LDPE matrix was researched, the orientation and dispersion behavior of CNFs, together with the morophology of LDPE spherulite were observed by field emission scanning electron microscopy （FE-SEM）, the crystalline structure of LDPE was studied by X-ray diffraction. The results showed that the incorporation and orientation of CNFs in the LDPE matrix have obvious effect on the crystallization property of the composites. Incorporation of CNFs in LDPE matrix decreased the crystallinity of the composites. Compared with the pure LDPE, the spherulite of the etched CNFs/LDPE nanocomposites could be observed only by more etching time. The crystalline morphology of LDPE could be observed and the diameter of spherulite was 6μm and orientation of CNFs in LDPEmatrix increased the crystallinity of composites.

关 键 词：纳米碳纤维 低密度聚乙烯 纳米复合材料 取向 结晶 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]