Bio-based PCM/carbon nanomaterials composites with enhanced thermal conductivity
Bio-based PCM/carbon nanomaterials composites with enhanced thermal conductivity
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DOI：
10.1016/j.solmat.2013.09.037
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发表时间：
2014
影响因子：
6.9
通讯作者：
Seulgi Yu;S. Jeong;Okyoung Chung;Sumin Kim
中科院分区：
文献类型：
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作者：
Seulgi Yu;S. Jeong;Okyoung Chung;Sumin Kim
本研究在液体生物相变材料中搅拌碳纳米材料，如剥离的纳米石墨小片(XGnP)和碳纳米管(CNT)，制备了具有高导热性能的生物基相变材料。将碳纳米材料按不同质量分数(1.0、3.0和5.0wt%)添加到Bio PCM中。用扫描电子显微镜(SEM)对复合材料的微观结构进行了表征，结果表明生物基PCM复合材料具有良好的分散性。傅里叶变换红外光谱(FT-IR)结果表明，生物基相变材料与所制备的碳纳米材料具有良好的相容性。随着碳纳米材料负载量的增加，复合材料的导热系数显著增加。差示扫描量热仪(DSC)分析表明，由于碳纳米材料具有较大的比表面积和良好的分散性，生物基PCM/xGnP复合材料保持了较大的相变热和较高的相变温度。TGA分析表明，Bio PCM复合材料在工作温度范围内具有良好的耐热性。因此，Bio PCM复合材料具有较高的热性能，适合作为潜热储能材料。
In this study, Bio-based PCMs were prepared by the stirring of carbon nanomaterials, such as exfoliated graphite nanoplatelets (xGnP) and carbon nanotubes (CNT), in liquid Bio PCM, for high thermal conductivity. Carbon nanomaterials were added to Bio PCM at different mass fractions (1.0, 3.0 and 5.0 wt%). The microstructures were characterized using scanning electron microscopy (SEM), and showed good dispersion of Bio-based PCM composites. Fourier transform infrared spectroscopy (FT-IR) results showed good compatibility between Bio-based PCM and prepared carbon nanomaterials. The thermal conductivities of composites were significantly increased, as the carbon nanomaterials loading contents increased. Differential scanning calorimetry (DSC) analysis results indicated that Bio-based PCM/xGnP composites maintained their large latent heat values and suitable phase change temperatures, due to large surface area, and good dispersion of carbon nanomaterials. TGA analysis revealed that Bio PCM composites had good thermal durability in the working temperature ranges. Therefore, Bio PCM composites can be considered as suitable candidates for latent heat thermal energy storage, with high thermal performance.