Hydrophilic expanded graphite-magnesium nitrate hexahydrate composite phase change materials Understanding the effect of hydrophilic modification on thermophysical properties | |
Zhang, Yue; Sun, Jinhe![]() ![]() ![]() | |
2019-03-10 | |
发表期刊 | INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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ISSN | 0363-907X |
卷号 | 43期号:3页码:1121-1132 |
摘要 | Expanded graphite (EG) has shown excellent performances in compression resilience, thermal conductivity, and adsorption ability. EG can adsorb liquid phase change materials (PCMs) mainly because of capillary action; however, EG is hydrophobic, which makes it less compatible with hydrated salts. Herein, hydrophilic EG (HEG) was prepared with Triton X-100 (TX-100) as surface modifier. The HEG-magnesium nitrate hexahydrate (HEG-MNH) composite as a PCM was investigated for thermal energy storage (TES) to understand the effect of hydrophilic modification on thermophysical properties. The powder-state HEG is added into MNH to prepare HEG-MNH composite PCM, which contains 1.71 wt% of TX-100, 7.29 wt% of EG, and 91.00 wt% of MNH by control variable method. The melting point and latent heat of HEG-MNH composite PCM were 89.05 degrees C and 137.28 J/g, respectively. The endothermic enthalpy change of HEG-MNH composite PCM only decreased by 0.90%, along with the exothermic values of HEG-MNH composite that increased by 3.80% after 100 cycles. The thermal conductivity is higher 5.17 times than that of the pure MNH. Our work suggests that the HEG-MNH composite PCM has a great potential to be used as a PCM for TES. |
DOI | 10.1002/er.4336 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.isl.ac.cn/handle/363002/34057 |
专题 | 盐湖资源综合利用工程技术中心 中国科学院青海盐湖研究所 |
推荐引用方式 GB/T 7714 | Zhang, Yue,Sun, Jinhe,Ma, Guixiang,et al. Hydrophilic expanded graphite-magnesium nitrate hexahydrate composite phase change materials Understanding the effect of hydrophilic modification on thermophysical properties[J]. INTERNATIONAL JOURNAL OF ENERGY RESEARCH,2019,43(3):1121-1132. |
APA | Zhang, Yue.,Sun, Jinhe.,Ma, Guixiang.,Wang, Zhao.,Xie, Shaolei.,...&Jia, Yongzhong.(2019).Hydrophilic expanded graphite-magnesium nitrate hexahydrate composite phase change materials Understanding the effect of hydrophilic modification on thermophysical properties.INTERNATIONAL JOURNAL OF ENERGY RESEARCH,43(3),1121-1132. |
MLA | Zhang, Yue,et al."Hydrophilic expanded graphite-magnesium nitrate hexahydrate composite phase change materials Understanding the effect of hydrophilic modification on thermophysical properties".INTERNATIONAL JOURNAL OF ENERGY RESEARCH 43.3(2019):1121-1132. |
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