微纳层叠共挤碳纳米管填充高抗冲聚苯乙烯/高抗冲聚苯乙烯(CNTs+HIPS/HIPS)交替层状复合材料的介电性能  

Dielectric properties of CNTs + HIPS/HIPS multilayered composites based on micro-nano lamination co-extrusion technology

作　　者：戴坤添 安瑛[1] 王玮鹭 李莉[1] 杨卫民[1] 焦志伟[1] DAI KunTian AN Ying WANG WeiLu LI Li YANG WeiMin JIAO ZhiWei(College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China)

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2016年第5期51-56,共6页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：中央高校基本科研业务费(YS1403);北京市自然科学基金(2162033)

摘　　要：利用自制的微纳层叠共挤出装置制备了2、8、32、128层的碳纳米管填充高抗冲聚苯乙烯/高抗冲聚苯乙烯(CNTs+HIPS/HIPS)交替层状复合材料,复合材料体系中CNTs+HIPS层碳纳米管的质量分数分为6%、10%两种,微层理论厚度分别为1 mm、250μm、62.5μm、15.6μm。采用数码电子显微镜对复合材料的微层界面进行了分析,并测试了复合材料的导电和介电性能。结果表明:微层实际厚度与理论厚度较为一致;CNTs+HIPS/HIPS交替层状复合材料在挤出方向与厚度方向上的电阻率呈现了明显的各向异性,挤出方向上表现为高导电的特性,而厚度方向上表现为绝缘的特性;层间界面数量的增多增强了界面极化效应,极大地提高了复合材料的介电常数,且表现出较好的频率独立性,同时在低频(<104Hz)下保持了低介电损耗。Four types of carbon-nanotube-filled high impact polystyrene（ CNTs ＋ HIPS）/high impact polystyrene（ HIPS） multilayered composites with 2,8,32 and 128 layers have been prepared using a self-made micro-nano lamination co-extrusion line： the content of CNTs in the CNTs ＋ HIPS layer was 6% or 10%.The theoretical thickness of the microlayers was 1mm,250 μm,62.5 μm,and 15.6 μm respectively.The interfaces between the CNTs ＋HIPS layer and the HIPS layers were studied using digital microscopy,and the electrical properties and dielectric properties of the composites were tested.The results showed that the actual thickness was essentially coincident with the theoretical thickness,and the electrical resistivity of the CNTs ＋ HIPS/HIPS multilayered composites exhibited significant anisotropy between the extrusion direction and the thickness direction.The multilayered composites showed highly conductive properties in the extrusion direction and insulating properties in the thickness direction.More interfaces were formed between CNTs ＋ HIPS and HIPS layers when the number of layers increased,which leads to an enhanced interfacial polarization process which improves the dielectric constants.In addition,the dielectric constant of CNTs ＋ HIPS/HIPS multilayered composites containing alternating layers was essentially independent of frequency,and low dielectric loss was maintained at low frequency（ 104Hz）.

关 键 词：微纳层叠 交替层状结构 高抗冲聚苯乙烯 碳纳米管 介电性能 

分 类 号：TB332[一般工业技术—材料科学与工程]