石蜡作为相变材料在热管理应用中存在导热系数低、易泄漏、与热管理器件接触热阻大的缺陷,限制了其大规模应用。为了改善石蜡相变材料的缺陷,以氢化苯乙烯-丁二烯-苯乙烯(SEBS)为基体,膨胀石墨(EG)协同碳纤维(CF)作为高导热介质,制备了系列定形复合相变材料。结果表明:定形复合相变材料具有良好的定形特性和柔性;EG和CF协同形成的有效导热通道增加了石蜡的导热系数,且导热系数随着CF含量的增加而增加;当EG质量分数为1%、CF质量分数为3%时,定形复合材料的导热系数增加了44.5%;EG和CF协同强化的定形复合相变材料控温特性良好,是一种具有应用潜力的热管理材料。
Paraffin wax,as a phase change material,exhibits shortcomings such as low thermal conductivity,leakage tendency,and high thermal contact resistance with thermal management devices,which limit its large-scale applications in thermal management.To address these defects,a series of form-stable composite phase change materials were fabricated using hydrogenated styrene-butadiene-styrene (SEBS) as the matrix,with expanded graphite (EG) synergistically combined with carbon fiber (CF) serving as high thermal conductivity media.The results demonstrated that the composite phase change materials exhibited excellent shape stability and flexibility.The synergistic formation of effective thermal conduction pathways by EG and CF enhanced the thermal conductivity of paraffin,showing an increasing trend with higher CF content.When the mass fraction of EG was 1% and that of CF was 3%,the composite material achieved a 44.5% improvement in thermal conductivity.The synergistic reinforcement by EG and CF endowed the composite phase change materials with superior temperature regulation characteristics,demonstrating promising potential as advanced thermal management materials.
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基金资助
国网四川省电力公司科技项目(521996220002)
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