多壁碳纳米管含量对聚丙烯/多壁碳纳米管介电复合材料性能的影响研究  

Influence of MWCNTs content on property of PP/MWCNTs dielectric composite

作　　者：黄安荣 韦良强[1,2] 孙静 戚远慧[2] 董珈豪 Huang Anrongl＇2, Wei Liangqiang,Sun Jing, Qi Yuanhui2, Dong Jiahao(1.Guizhou Material Industrial Technology Institute,Guiyang 550014 ;2.National Engineering Research Center for Compounding and Modification of Polymer Materials,Guiyang 55001)

机构地区：[1]贵州省材料产业技术研究院,贵阳550014 [2]国家复合改性聚合物材料工程技术研究中心,贵阳550014

出　　处：《化工新型材料》2018年第3期58-61,66,共5页New Chemical Materials

基　　金：国家自然科学基金(21664004);贵州省自然科学基金(黔科合基础[2017]1090)

摘　　要：采用微纳叠层共挤方法研究了不同含量的多壁碳纳米管(MWCNTs)对聚丙烯/多壁碳纳米管(PP/MWCNTs)介电复合材料微观形貌、结晶行为以及介电性能的影响。结果表明:由于微纳叠层共挤过程中共混物熔体流经倍增器,受到多次分流、剪切作用,使MWCNTs能够在基体PP中分散得更加均匀;MWCNTs在PP基体中起到明显的异相成核作用,MWCNTs含量为2%(质量分数)时,复合材料结晶度较纯PP提高了20%;同时,MWCNTs的加入使PP/MWCNTs复合材料的介电常数大幅提升,介电损耗变化不大。The effects of different contents of MWCNTs on the microstructure,crystallization behavior and dielectric properties of polypropylene/MWCNTs（PP/MWCNTs）dielectric composites were studied by micro-nanostack co-extrusion method.The results showed that MWCNTs can be dispersed more uniformly in PP matrix due to the multiple shunting and shearing of blends in the process of micro-nano-stacks co-extrusion.MWCNTs played significant role as heterogeneous nucleation in PP matrix.When the content of MWCNTs was 2 wt%,the crystallinity of composite was increased 20%than that of pure PP.In the same time,the addition of MWCNTs increased the dielectric constant of PP/MWCNTs but the dielectric loss did not change significantly.

关 键 词：聚丙烯 介电材料 碳纳米管 结晶 

分 类 号：TB332[一般工业技术—材料科学与工程]