Preparation of stearic acid/modified expanded vermiculite composite phase change material with simultaneously enhanced thermal conductivity and latent heat
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- 作者：Xiangqi Li ; lxiangqi@fzu.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Haiting Wei ; Xingshui Lin ; Xiuzhen Xie
- 关键词：Expanded vermiculite ; Stearic acid ; Titanium dioxide ; Acid treatment ; Form-stable composite PCM
- 刊名：Solar Energy Materials and Solar Cells
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：155
- 期：Complete
- 页码：9-13
- 全文大小：1054 K
文摘
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Expanded vermiculite loaded with titanium dioxide and treated with nitric acid (aEVT) was used for absorbing stearic acid (SA) by vacuum impregnation method.
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The latent heats of SA/aEVT were 146.8 J/g at the melting temperature of 65.9 °C and 141.7 J/g at the freezing temperature of 63.4 °C.
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The thermal conductivity of SA/aEVT was 0.58 W/mK.
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The latent heat and thermal conductivity of SA/aEVT were both higher than those of SA/EV and SA/aEV.
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The SA/aEVT composite PCM has good thermal and chemical stabilities.