采用熔融共混法制备导热增强型石蜡/高密度聚乙烯(HDPE)/膨胀石墨(EG)复合相变材料(PCM),进行扫描电镜、热重、差示扫描量热表征和性能测试,并探讨热导率的影响因素.结果表明,复合相变材料中,石蜡、HDPE和EG相容性良好,其中石蜡作为相变材料,HDPE是支撑材料,EG是导热填料.HDPE和石蜡配比一定时,复合相变材料热导率随EG含量的增加而增加;EG含量固定时,随HDPE和石蜡质量比的增加而降低.当石蜡含量为66.7％时,相变焓高达150.2 J/g,与计算值接近.
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