Study of the effect of phase state on the interfacial thermal conductance between PCMs and ceramic skeletons

IF 2.1 4区 材料科学 Q3 MATERIALS SCIENCE, COMPOSITES Composite Interfaces Pub Date : 2023-05-08 DOI:10.1080/09276440.2023.2210878
Tong Zhang, Fangyuan Sun, Libing Zheng, Dazheng Wang, Yanhui Feng
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Abstract

ABSTRACT Composite phase change materials with sugar alcohol as the phase change material and highly thermally conductive ceramics as the porous skeleton are widely used in various thermal storage systems. The interfacial thermal conductance (ITC) between the phase change materials under different phases and the skeleton is an important factor affecting the rate of heat storage (release) in thermal storage systems. The ITC between ceramics(AlN, SiC) and sugar alcohols (mannitol and galactitol) in the solid and liquid states is investigated by means of both time-domain thermoreflectance and molecular dynamics simulations. The results show that the ITC between phase change materials and ceramic is better in liquid state than in solid state, and that the ITC between mannitol and ceramic is better, and that the ITC betweenAlN and sugar alcohol is better. More low-frequency phonons are involved in the thermal transport of the sugar alcohols in the liquid state, with an average overlap energy of about 9.5% higher than that of the solid state and an average phonon participation rate of about 6.8% higher. It was also found that it isthe H atom in the sugar alcohol that is linked to the C atom that governs the ITC. GRAPHICAL ABSTRACT
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相态对相变材料与陶瓷骨架界面热导率影响的研究
以糖醇为相变材料,高导热陶瓷为多孔骨架的复合相变材料广泛应用于各种储热系统中。在蓄热系统中,不同相的相变材料与骨架之间的界面导热系数是影响储热(释热)速率的重要因素。采用时域热反射和分子动力学模拟的方法研究了陶瓷(AlN, SiC)和糖醇(甘露醇和半乳糖醇)在固体和液体状态下的ITC。结果表明:相变材料与陶瓷之间液相ITC优于固态ITC,甘露醇与陶瓷之间ITC优于固态ITC, aln与糖醇之间ITC优于固态ITC。液相中更多低频声子参与糖醇的热输运,其平均重叠能比固态高9.5%左右,平均声子参与率高6.8%左右。研究还发现,控制ITC的是糖醇中的H原子与C原子相连。图形抽象
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来源期刊
Composite Interfaces
Composite Interfaces 工程技术-材料科学:复合
CiteScore
5.00
自引率
3.80%
发文量
58
审稿时长
3 months
期刊介绍: Composite Interfaces publishes interdisciplinary scientific and engineering research articles on composite interfaces/interphases and their related phenomena. Presenting new concepts for the fundamental understanding of composite interface study, the journal balances interest in chemistry, physical properties, mechanical properties, molecular structures, characterization techniques and theories. Composite Interfaces covers a wide range of topics including - but not restricted to: -surface treatment of reinforcing fibers and fillers- effect of interface structure on mechanical properties, physical properties, curing and rheology- coupling agents- synthesis of matrices designed to promote adhesion- molecular and atomic characterization of interfaces- interfacial morphology- dynamic mechanical study of interphases- interfacial compatibilization- adsorption- tribology- composites with organic, inorganic and metallic materials- composites applied to aerospace, automotive, appliances, electronics, construction, marine, optical and biomedical fields
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