微纳层叠挤出CNTs/HIPS复合材料的介电与导电性能  

Dielectric and Electrical Properties of CNTs/HIPS Composite Based on Micro-Nano Lamination Extrusion Technology

作　　者：戴坤添 安瑛[1] 李长金[1] 程祥[1] 杨卫民[1] 焦志伟[1] 

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《塑料》2017年第1期72-75,82,共5页Plastics

摘　　要：利用自制的微纳层叠挤出装置制备了CNTs含量为1%、3%时的1、9、81、729层的碳纳米管/高抗冲聚苯乙烯(CNTs/HIPS)多层复合材料,研究了微纳层叠挤出技术对复合材料介电与导电性能的影响。结果表明:随着层数的增加,低频下交流电导率轻微下降,而介电常数得到明显提高。CNTs含量为3%的试样在100 Hz时,9、81、729层试样的介电常数比1层试样的介电常数依次提高了25.4%、63.4%、135.2%。分析表明:这归结于微纳层叠挤出过程中的剪切及拉伸作用使CNTs在HIPS基体中发生取向,且随着层数的增加,取向效果越明显,碳纳米管的取向造成导电网络被破坏,导致交流电导率轻微下降,但可形成更多的微电容结构,提高了复合材料的介电常数。Carbon nanotube/high impact polystyrene （CNTs/HIPS） composite with 1,9,81,729 layers were prepared by using self-made micro-nano lamination device, and the content of CNTs was 1% or 3%. The influence of micro-nano lamination extrusion technology on dielectric andelectrical properties was studied. The results showed that AC conductivity dec, reased and dielectric constant increased at low frequency when layers increased. Dielectric constant of 9 layers, 81 layers, 729 layers sample was increased by 25.4% ,63.4% ,135.2% comparing with 1 layer sampleat 100 Hz. The analysis showed that micro- nano lamination extrusion technology could make CNTs align in HIPS matrix, and the orientation effect of CNTs was more obviously with increasing the number of layers, which destroyed the conductive network and formed more numbers of micro capacitor structure.

关 键 词：微纳层叠 碳纳米管 高抗冲聚苯乙烯 取向 介电性能 导电性能 

分 类 号：TB332[一般工业技术—材料科学与工程]