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首页> 外文期刊>International Journal of Heat and Mass Transfer >Preparation and enhanced heat capacity of nano-titania doped erythritol as phase change material
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Preparation and enhanced heat capacity of nano-titania doped erythritol as phase change material

机译：纳米二氧化钛掺杂赤藓糖醇作为相变材料的制备及提高的热容量

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摘要

In this paper, novel nano-enhanced phase change materials (NePCMs) were prepared by two step method. Nano-titania and erythritol were chosen as nano material and phase change material (PCM), respectively. Among many dispersants, triethanolamine (TEA) was proved the most effective one due to its low molecular weight and the carried hydroxide radical. The results showed that the heat capacity of NePCMs was enhanced by the doping of nano-titania. The enhancement was about 40% and 14% in solid and liquid state, respectively, when the volume fraction of nano-titania was only 0.2 vol%. We argued that the increased fraction of atoms located in the metastable interfaces contributed to the increase of specific heat capacity in solid state. While in liquid state, the enhancement of heat capacity was due to the increased interfacial thermal resistance caused by high surface area of nanoparticles.
机译：本文采用两步法制备了新型的纳米增强相变材料。分别选择纳米二氧化钛和赤藓糖醇作为纳米材料和相变材料（PCM）。在许多分散剂中，三乙醇胺（TEA）由于其低分子量和携带的氢氧自由基被证明是最有效的分散剂。结果表明，纳米二氧化钛的掺杂增强了NePCM的热容。当纳米二氧化钛的体积分数仅为0.2vol％时，在固态和液态下的增强分别为约40％和14％。我们认为位于亚稳态界面的原子分数的增加导致固态比热容量的增加。当处于液态时，热容量的增加是由于纳米颗粒的高表面积引起的界面热阻的增加。

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  • 作者

    Luo Zhichao; Zhang Qiang; Wu Gaohui;

  • 作者单位

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China,National Key Laboratory of Material Behaviors & Evaluation Technology in Space Environments, Harbin 150001, PR China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China,National Key Laboratory of Material Behaviors & Evaluation Technology in Space Environments, Harbin 150001, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanofluid; Heat capacity; Phase change material; Nanomaterial; Erythritol;

    机译：纳米流体热容量;相变材料;纳米材料赤藓糖醇;

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