正癸酸-月桂酸-硬脂酸三元低共熔体系/膨胀石墨复合相变材料的制备与表征<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.04.021

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Abstract A ternary composite phase change material system (DA-LA-SA) was prepared by blending decanoic acid (DA), lauric acid (LA) and stearic acid (SA). Then a series of fatty acid eutectic mixture/expanded graphite composite phase change materials (DA-LA-SA/EG-PCMs) were prepared with DA-LA-SA as phase change component and expanded graphite (EG) as carrier component, by melt blending method. The composition, crystal structure, microstructure, phase transition temperature and enthalpy of DA-LA-SA/EG-PCMs were characterized by FT-IR, XRD, SEM, TGA and DSC. The results showed that when the mass ratio of DA/LA/SA was 1∶8∶1, DA-LA-SA had low phase transition temperature and high phase change enthalpy. EG was composed of numberous pores, and the DA-LA-SA/EG-PCMs with physical combination of EG and DA-LA-SA had good stability through the microporous bound and surface adsorption of EG. When the content of EG was 10wt%, the phase change temperature, enthalpy and thermal conductivity were 38.6 ℃, 123 J/g, and 3.572 1 W·(m·K)^-1,respectively, accompanied with a uniform dispersion and small particle size, as well as excellent thermal performance and stability.

Key words： ternary fatty acids expanded graphite composite phase change materials thermal properties decanoic acid-lauric acid-stearic acid low eutectic temperature

Published: 25 February 2017 Online: 2018-05-02

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TK02

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.04.021 OR https://www.mater-rep.com/EN/Y2017/V31/I4/94

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