月桂酸/膨胀珍珠岩复合相变材料的制备与热性能研究*

doi:10.11896/j.issn.1005-023X.2017.010.022

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Abstract Lauric acid/expanded perlite phase change materials(LA/EP-PCMs) were prepared by vacuum absorption method with lauric acid as phase change materials, expanded perlite as skeleton. The microstructure, phase change temperature, latent heat as well as thermal stability of LA/EP-PCMs were investigated by FT-IR, SEM, DSC and TGA, respectively. The results showed that lauric acid could be absorbed in the pore of porous expanded perlite well and had good chemical compatibilities with expanded perlite. As the saturated mass fraction of lauric acid of LA/EP-PCMs is 65%, phase change temperature and latent heat of the phase change materials were determined as 41.3 ℃ and 110.1 J/g. The thermal conductivity was increased from 0.09 W/(m·K) to 0.16 W/(m·K), which was increased by 77.7% when 5% nano graphite fiber (NGF) was added into LA/EP-PCMs as additive. Experiment of melting and frozen showed that the incorporation of NGF improved the thermal release capacity of composite phase change materials, and the thermal conduction mechanism was the formation of thermal conduction network on the outer and inner surfaces of the phase change substrate.

Key words： lauric acid expanded perlite LA/EP-PCMs nano graphite fiber thermal conductivity thermal conduction network

Published: Online: 2018-05-08

CLC number:

TB34

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	Articles by authors
	ZHAO Sixie
	YAN Hua
	WANG Hongtao
	LI Yuntao
	YU Rongsheng
	YANG Jianjian

Cite this article:

ZHAO Sixie,YAN Hua,WANG Hongtao, et al. Preparation of Lauric Acid/Expanded Perlite Composite Phase Material and Its Thermal Performance[J]. Materials Reports, 2017, 31(10): 107-111.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.010.022 OR https://www.mater-rep.com/EN/Y2017/V31/I10/107

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