文献类型：期刊文献

中文题名：Ni@C/HDPE复合材料的制备及其正温度系数性能研究

英文题名：PREPARATION OF Ni@ C/HDPE CONDUCTIVE COMPOSITES AND THEIR POSITIVE TEMPERATURE COEFFICIENT PERFORMANCE

作者：钱綮[1];胡彦杰[1];李春忠[1]

机构：[1]华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室,上海200237

年份：2013

卷号：23

期号：9

起止页码：1159

中文期刊名：高分子学报

外文期刊名：Acta Polymerica Sinica

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000327004000006)】；北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金(基金号21136006;21206043;21236003);教育部新世纪优秀人才计划(项目号NCET-11-0641);上海市曙光计划(项目号10SG31);高等学校博士学科点专项科研基金(基金号20110074110010);中央高校基本科研业务费专项资金资助项目

语种：中文

中文关键词：喷雾燃烧;Ni@C;PTC性能

外文关键词：Flame spray pyrolysis; Ni@ C; PTC performance

摘要：采用还原气氛喷雾燃烧法制备了具有核壳结构Ni@C纳米复合颗粒,并与HDPE共混挤出制备了聚合物基PTC导电复合材料,并且对其结构和性能进行了表征.结果表明,所制备的Ni@C复合纳米颗粒具有典型的核壳结构,其中,金属镍的核的粒径为30~50 nm,碳包覆壳层的厚度约为2.9 nm,热重分析结果表明Ni@C复合纳米颗粒的含碳量为3.4%,碳包覆层的存在阻止了金属镍颗粒的团聚;对Ni@C/HDPE复合材料的断面SEM和切片TEM分析结果表明复合颗粒在HDPE基体中分散性良好,复合材料的渗流阈值为10wt%,PTC强度为8个数量级.
Carbon encapsulated nickel（Ni@ C） nanoparticles were synthesized via one step reducing flame spray pyrolysis approach and mixed with HDPE to prepare polymer based positive temperature coefficient（PTC） conductive composites.The as-prepared Ni@ C nanoparticles possessed a core/shell structure with carbon shell located outside and nickel core located inside.The mean size of Ni@ C nanoparticles was 30 ~ 50 nm,and the carbon shell was about 2.9 nm in thickness.The carbon content of Ni @ C was about 3.4% calculated from TG analysis.The existence of carbon shell has significantly prevented the agglomeration of metallic nickel particles.Investigations of composite structure were carried by using an optical microscope on slides of composites and section SEM analysis.Results showed the Ni@ C had a good spatial distribution in the HDPE matrix,and the PTC conductive composite performed a low percolation threshold of 10 wt% and a high PTC intensity of 8 in magnitude.