探究了二维石墨烯片(GNPs)对复合相变材料导热性的影响,以芒硝基复合相变材料(SCNa)为原料,制备出石墨烯片增强芒硝基复合相变材料(SCNaG).探讨了GNPs添加量对SCNa相变材料导热率的影响,并对其过冷机理进行了讨论.结果表明:复合相变材料导热系数随着GNPs添加量呈线性增加,当GNPs=0wt％时,相变材料导热系数为0.854 W/(m·K);当GNPs=3wt％时,相变材料导热系数为1.405 W/(m·K);随着GNPs添加量的增大相变材料过冷度先减小后增大,当GNPs=0.5wt％时,过冷度低于纯SCNa相变材料,为2.5℃C,当GNPs=3wt％时,过冷度增大至10.9℃.GNPs的添加量对相变材料相变温度影响不大,相变潜热略有减小.
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