Melamine foam/reduced graphene oxide supported form-stable phase change materials with simultaneous shape memory property and light-to-thermal energy storage capability

材料科学 石墨烯 潜热 热能储存 氧化物 形状记忆合金 复合材料 储能 相变材料 多孔性 热的 纳米技术 热力学 冶金 气象学 功率(物理) 物理 生物 量子力学 生态学
作者
Haiyan Wu,Song-tai Li,Yao-wen Shao,Xin-zheng Jin,Xiao‐dong Qi,Jing‐hui Yang,Zuowan Zhou,Yong Wang
出处
期刊:Chemical Engineering Journal [Elsevier BV]
卷期号:379: 122373-122373 被引量:249
标识
DOI:10.1016/j.cej.2019.122373
摘要

Abstract The advanced utilization of phase change materials (PCMs) is limited by the strong rigidity, liquid leakage and lack of photoabsorption ability. In this work, a novel form-stable PCM with solar-to-thermal energy storage ability and thermal/light-actuated shape memory property was prepared. Herein, paraffin wax (PW) served as a latent heat storage material and a switching phase for shape fixation, melamine foam (MF) acted as a supporting material to prevent the leakage and a permanent phase for shape recovery, and reduced graphene oxide (RGO) assembled on MF skeletons worked as a light absorption medium. Due to the light weight and abundant porosity of MF/RGO foam, the MF/RGO/PW PCMs possessed excellent encapsulation ability, high latent heat (144.8 J/g), good solar-to-thermal energy conversion and storage ability. Simultaneously, combining the elasticity of MF/RGO foam, the MF/RGO/PW PCMs exhibited thermal/light-sensitive shape memory property by triggering the phase transition of PW. The MF/RGO/PW PCMs showed excellent cyclic shape memory performance and thermal reliability. A light-sensitive and temperature-controlled board was further exploited, which could be installed on the roof of the house and maintained the temperature constancy. This study provides a strategy to prepare flexible, light-sensitive and form-stable PCMs via using the elastic MF/RGO foam as a supporting scaffold, and these PCMs have great potential in solar energy utilization and energy-saving buildings.
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