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Fabrication and thermal performance of ternary fatty acid/expanded graphite form-stable composite phase change
Dongyi Zhou1, Jiawei Yuan1, Fanchen Zhou1
1School of Energy and Mechanical Engineering, Hunan University of Humanities, Science and Technology, Loudi, China.
None:
Form-stable composite phase change material (CA-LA-MA/EG) was prepared by vacuum impregnation, using ternary fatty acid eutectic as the core and expanded graphite as the porous matrix. Its composition, morphology, and thermal properties were characterized by FT-IR, SEM, and DSC, with thermal conductivity measured by the heat flux method. CA-LA-MA was uniformly dispersed in EG with an optimal loading of 91.4%, showing suitable phase-change temperature and latent heat for cold chain use. EG greatly enhanced thermal conductivity and heat storage/release rates. The composite maintained excellent thermal and chemical stability after 1500 thermal cycles. With low supercooling, high conductivity at only 8.6 wt % EG loading, and good cycling stability for 10°C-20°C cold chain logistics, it is a promising candidate for low-temperature thermal management.
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