导热填料对HDPE/石蜡定形相变材料性能的影响  

Effect of Thermal Conductive Fillers on the Property of HDPE /Paraffin Shape-stabilized Phase-Change Materials

作　　者：杨序平[1,2] 刘菁伟 杨文彬[1,2] 范敬辉[3] 张凯[3] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料国家重点实验室培育基地,四川绵阳621010 [2]西南科技大学教育部生物质材料工程研究中心,四川绵阳621010 [3]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《西南科技大学学报》2014年第2期10-13,共4页Journal of Southwest University of Science and Technology

基　　金：国家自然科学基金-中国工程物理研究院联合资助项目(11176025)

摘　　要：采用熔融共混技术,在高密度聚乙烯(HDPE)/石蜡定形相变材料中添加普通石墨、氧化膨胀石墨、超声膨胀石墨以及膨胀石墨(EG)4种导热填料制备导热定形相变材料(PCM)。SEM图表明导热填料可以与HDPE、石蜡均匀混合。添加导热填料后定形相变材料的渗漏率有增大的趋势,但添加普通石墨和超声膨胀石墨时,渗漏率随导热填料含量的增加而增加,添加氧化膨胀石墨和EG时,PCM的渗漏率随导热填料含量的增加而降低。定形相变材料中添加导热填料时其热导率有显著提高。添加EG时,定形相变材料的热导率提高最多,提高率达144.7%。Four kinds of thermal conductive fillers,such as graphite,oxide expanded graphite,ultrasonic expanded graphite and expanded graphite were added into HDPE /paraffin shape-stabilized phase-change materials by using melt blending method to fabricate heat-conductive phase-change materials.SEM images show that the heat-conductive fillers are mixed well with the HDPE /paraffin. When graphite and ultrasound expanded graphite were added,the leakage rate of phase-change materials was increased with the increase of the filler content. When oxide expanded graphite and expanded graphite are added,the leakage rate of phase-change materials was decreased with the increase of the filler content.The thermal conductivity of the PCM is improved significantly with the thermal conductive filler added.When expanded graphite are added,the thermal conductivity rate can reach up to 144. 7%.

关 键 词：定形相变材料 导热填料 渗漏率 热导率 

分 类 号：TB332[一般工业技术—材料科学与工程]