石蜡-碳纳米管复合材料的热物性研究

发布时间：2018-10-26 14:36

【摘要】：为提高石蜡作为相变蓄冷材料的导热性能,制备了碳纳米管添加量分别为0%、1%、2%、3%、4%、5%的石蜡-碳纳米管复合材料,并对其热物性及稳定性进行实验研究。结果表明,随着碳纳米管添加量的增加,复合材料的相变温度基本不变,相变潜热逐渐减小,导热系数逐渐增大。在添加量为5%时,复合材料的融化和凝固相变潜热分别为128.2 J/g和134.4 J/g,比纯石蜡相对减小了15.5%和13.8%;固态和液态导热系数分别为0.487 W/(m·K)和0.516 W/(m·K),比纯石蜡相对提高了39.5%和40.3%,同时具有较好的循环稳定性。
[Abstract]:In order to improve the thermal conductivity of paraffin as a phase change material, a paraffin-carbon nanotube composite containing 0% carbon nanotube (CNT) was prepared. The thermal properties and stability were studied experimentally. The results show that with the increase of the content of carbon nanotubes, the phase transition temperature of the composites is basically unchanged, the latent heat of phase transition decreases gradually, and the thermal conductivity increases gradually. The latent heat of melting and solidification phase transition is 128.2 J / g and 134.4 J / g respectively, which is 15.5% and 13.8% lower than that of pure paraffin. The thermal conductivity of solid and liquid phase is 0.487 W / (m K) and 0.516 W / (m K), respectively, which is 39.5% and 40.3% higher than that of pure paraffin, and has good cycle stability.
【作者单位】：郑州轻工业学院能源与动力工程学院;
【基金】：国家自然科学基金资助项目(No.51476149) 河南省杰出青年基金项目(No.154100510014) 河南省教育厅创新才团队项目(No.17IRTSTHN029)
【分类号】：TB332;TK02

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