Journal
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
Volume 29, Issue 1, Pages 168-176Publisher
SPRINGER
DOI: 10.1007/s12613-021-2357-4
Keywords
mica; polyethylene glycol; phase change materials; thermal energy storage
Categories
Funding
- National Natural Science Foundation of China [51874047, 51504041]
- Special Fund for the Construction of Innovative Provinces in Hunan Province, China [2020RC3038]
- Changsha City Fund for Distinguished and Innovative Young Scholars, China [kq1802007]
- Fund for University Young Core Instructors of Hunan Province, China
- Innovation Program for Postgraduate of Changsha University of Science and Technology, China
- Outstanding Youth Project of Hunan Provincial Department of Education, China [18B148]
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In this study, mica was used as a supporting matrix for composite phase change materials (PCMs), and its interaction with polyethylene glycol (PEG) was investigated. The results showed that mica could stabilize PEG, and the composite PCM exhibited improved thermal properties, indicating its potential application in building energy conservation.
Mica was used as a supporting matrix for composite phase change materials (PCMs) in this work because of its distinctive morphology and structure. Composite PCMs were prepared using the vacuum impregnation method, in which mica served as the supporting material and polyethylene glycol (PEG) served as the PCM. Fourier transform infrared and X-ray diffraction analysis confirmed that the addition of PEG had no effect on the crystal structure of mica. Moreover, no chemical reaction occurred between PEG and mica during the vacuum impregnation process, and no new substance was formed. The maximum load of mica-stabilized PEG was 46.24%, the phase change temperature of M-400/PEG was 46.03 degrees C, and the latent heat values of melting and cooling were 77.75 and 77.73 J center dot g(-1), respectively. The thermal conductivity of M-400/PEG was 2.4 times that of pure PEG. The thermal infrared images indicated that the thermal response of M-400/PEG improved relative to that of pure PEG. The leakage test confirmed that mica could stabilize PEG and that M-400/PEG had great form-stabilized property. These results demonstrate that M-400/PEG has potential in the field of building energy conservation.
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