文献类型：期刊文献

中文题名：Thermal conductivity and mechanical properties of high density polyethylene composites filled with silicon carbide whiskers modified by cross-linked poly (vinyl alcohol)

英文题名：Thermal conductivity and mechanical properties of high density polyethylene composites filled with silicon carbide whiskers modified by cross-linked poly(vinyl alcohol)

作者：Jiaming Fan[1];Shiai Xu[1,2]

机构：[1]School of Materials Science and Engineering ,East China University of Science and Technology,Shanghai 200237,China;[2]School of Chemical Engineering,Qinghai University,Xining 810016,China

年份：2018

卷号：34

期号：12

起止页码：2407

中文期刊名：Journal of Materials Science & Technology

外文期刊名：材料科学技术（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2017_2018】；PubMed;

基金：financially sponsored by the National Natural Science Foundation of China(No.U1507123);the Foundation of Qinghai Science and Technology Department(No.2017-HZ-803);the Thousand Talents Program of Qinghai Province;Kunlun Scholar Award Program of Qinghai Province

语种：英文

中文关键词：Polyethylene composites;Silicon carbide;Whisker;Thermal conductivity

外文关键词：Polyethylene composites;Silicon carbide;Whisker;Thermal conductivity

摘要：A thin layer of poly(vinyl alcohol)(PVA) was coated on the surface of silicon carbide whiskers(SCWs)and crosslinked by glutaraldehyde, and then these modified whiskers(mSCWs) were incorporated into high density polyethylene(HDPE) to prepare HDPE/mSCW composites with a high thermal conductivity.The thermal conductivity, mechanical properties, heat resistance, thermal stability and morphology of HDPE/mSCW and HDPE/SCW composites were characterized and compared. The results reveal that the thermal conductivity of both HDPE/SCW and HDPE/mSCW composites increases with the increase of filler loading, and reaches a maximum of 1.48 and 1.69 W/(m K) at 40 wt% filler loading, which is 251.20% and 300.75% higher than that of HDPE, respectively. Significantly, HDPE/mSCW composites have a higher thermal conductivity than their HDPE/SCW counterparts with the same filler loading. In addition, the heat resistance, Young’s modulus and yield strength of both HDPE/SCW and HDPE/mSCW composites are also improved compared with that of HDPE. mSCW can be homogenously dispersed in the HDPE matrix, which contributes to the formation of thermally conductive networks by the inter-connection of mSCWs.
A thin layer of poly(vinyl alcohol)(PVA) was coated on the surface of silicon carbide whiskers(SCWs)and crosslinked by glutaraldehyde, and then these modified whiskers(mSCWs) were incorporated into high density polyethylene(HDPE) to prepare HDPE/mSCW composites with a high thermal conductivity.The thermal conductivity, mechanical properties, heat resistance, thermal stability and morphology of HDPE/mSCW and HDPE/SCW composites were characterized and compared. The results reveal that the thermal conductivity of both HDPE/SCW and HDPE/mSCW composites increases with the increase of filler loading, and reaches a maximum of 1.48 and 1.69 W/(m K) at 40 wt% filler loading, which is 251.20% and 300.75% higher than that of HDPE, respectively. Significantly, HDPE/mSCW composites have a higher thermal conductivity than their HDPE/SCW counterparts with the same filler loading. In addition, the heat resistance, Young's modulus and yield strength of both HDPE/SCW and HDPE/mSCW composites are also improved compared with that of HDPE. mSCW can be homogenously dispersed in the HDPE matrix, which contributes to the formation of thermally conductive networks by the inter-connection of mSCWs.