摘要
通过两步法制备了纳米石墨烯(GNS)/超高分子量聚乙烯(UHMWPE)分离结构导电复合材料,通过扫描电子显微镜和透射偏光显微镜研究了导电复合材料的形态结构与电性能的关系。研究表明,GNS粒子能够均匀地涂覆在UHMWPE粒子表面。当GNS的体积分数为0.4%时,复合材料电导率提升了15个量级,渗流阀值为0.028%(体积分数,下同)。GNS/UHMWPE分离结构导电复合材料的正温度系数效应(PTC)研究表明,由于填料分布形态及含量的变化,导致复合材料PTC转变温度发生改变。
Nano-graphene（ GNS） / ultrahigh molecular weight polyethylene（ UHMWPE） conductive composite materials were prepared by two-step process. The relationship between the morphological structure with electrical properties for GNS / UHMWPE conductive composites was studied by scanning electron microscopy（ SEM） and polarizing microscope（ POM）. It is found that GNS can be well coated on the surfaces of UHMWPE particles. The addition of 0. 4% GNS into UHMWPE matrix results in a dramatic increase of electrical conductivity by 15 orders of magnitude. A lower percolation threshold is achieved at the GNS concentration of 0. 028%. The positive temperature coefficient（ PTC） transition temperature changes due to the distribution and content of filler.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2016年第2期95-98,共4页
Polymer Materials Science & Engineering
关键词
石墨烯
两步法
分离结构
超高分子量聚乙烯
正温度系数效应
graphene
two-step process
segregated structure
ultra high molecular weight polyethylene
positive temperature coefficient
