摘要
用油酸钠/乙醇溶液、邻二氯苯、N-甲基吡咯烷酮对膨胀石墨进行表面处理和分散改性并制备了纳米石墨微片(GNP),研究了其效果,确定了油酸钠/乙醇溶液作为分散介质和表面改性剂。将由该处理剂制得的GNP以不同添加量添加到聚丙烯/聚烯烃弹性体共混树脂(PP/POE)中,制得PP/POE/GNP复合材料。测试表明,GNP在基体中分散均匀,大部分达到纳米尺寸,与基体结合良好,复合材料的室温渗滤阈值为9%左右(对应GNP质量份数为10份),GNP质量份数超过10份之后复合材料成为半导体,最低体积电阻率为3.6×107Ω.cm。当GNP质量份数为20份时,复合材料仍然保持较佳力学性能,材料破坏方式为脆性断裂。
Sodium oleate-ethanol mixed solution, orthodichlorobenzene and 1-Methyl-2-pyrrolidinone were dividedly used for the surface treatment on the expanded graphite and the graphite nanoplatelets （ GNP ） were prepared. Then treatment effect was studied and sodium oleate-ethanol mixed solution was selected as the dispersion medium and surface modifier for the expanded graphite. Polypropylene / polyolefin elastomer / GNP composites with different contents of GNP were prepared using the sodium oleate as the treating agent.The measurements indicate that GNP are homogenously dispersed in the polymer matrix, most of which are nano-size particles, and also bond well with the polymer matrix. The percolation value of the composites is about 9%（correstponding to the content of GNP being 10 phr）. The composites become semi-conductor when the filler content is beyond 10 phr and the minimum volume resistance is 3.6×10^7Ω·cm. The mechanical tests of the composites show that the composites maintain good mechanical properties when the content of GNP is 20 phr, and the failure mode of the composites is brittle fracture.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2013年第6期38-42,共5页
Engineering Plastics Application
基金
重庆市科委自然科学基金项目(2010BB4086)
重庆理工大学大学生创新基金项目(62-01-61)
关键词
聚丙烯
导电
复合材料
石墨微片
polypropylene
conductive
composite
graphite nanoplatelet
