Lauric-stearic acid eutectic mixture/carbonized biomass waste corn cob composite phase change materials: Preparation and thermal characterization

被引：107

作者：

Zhang, Weiyi ^{[1
]}

Zhang, Xianmei ^{[1
]}

Zhang, Xiaoguang ^{[1
]}

Yin, Zhaoyu ^{[1
]}

Liu, Yangai ^{[1
]}

Fang, Minghao ^{[1
]}

Wu, Xiaowen ^{[1
]}

Min, Xin ^{[1
]}

Huang, Zhaohui ^{[1
]}

机构：

[1] China Univ Geosci, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Natl Lab Mineral Mat, Beijing 100083, Peoples R China

来源：

THERMOCHIMICA ACTA | 2019年 / 674卷

关键词：

Lauric-stearic acid eutectic mixture; Carbonized biomass waste corn cob; Phase change materials; Thermal properties; ACID/EXPANDED PERLITE COMPOSITE; ENERGY-STORAGE; CONDUCTIVITY ENHANCEMENT; POLYETHYLENE-GLYCOL; PERFORMANCE; VERMICULITE; GYPSUM; HEAT; PCMS;

D O I：

10.1016/j.tca.2019.01.022

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, novel form-stable composite phase change materials (FS-CPCMs) were prepared by the incorporation of a eutectic mixture of lauric-stearic acid (LA-SA) into carbonization corn cob (CNCC). CNCC served as a good supporting material that not only prevented the leakage of LA-SA but also enhanced its thermal conductivity. Scanning electron microscopy results demonstrated that CNCC exhibits a highly porous structure comprising rough micropores. The retention of 77.9 wt% of LA-SA in CNCC without leakage was observed. Differential scanning calorimetry results revealed that LA-SA/CNCC FS-CPCMs melt at 35.1 degrees C with a latent heat of 148.3 J/g and solidify at 29.7 degrees C with a latent heat of 144.2 J/g. The thermal conductivity of LA-SA/CNCC FS-CPCMs was approximately 87.5% greater than that of LA-SA. Thermogravimetric analysis and 200-cycle experiments indicated that the LA-SA/CNCC FS-CPCMs exhibit excellent thermal stability and form-stable performance. Therefore, the as-prepared LA-SA/CNCC FS-CPCMs demonstrate promise for building energy-efficiency applications.

引用

页码：21 / 27

页数：7

共 46 条

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