材料科学
潜热
传热
化学工程
复合数
热能储存
气凝胶
复合材料
聚乙二醇
热力学
物理
工程类
作者
Heng Wang,Yong Deng,Yilin Liu,Fuzhong Wu,Wenhao Wang,Huixin Jin,Jinlong Zheng,Jie Lei
标识
DOI:10.1016/j.compositesa.2022.106853
摘要
The latent heats of form-stable composite phase change materials (fs-CPCMs) were usually reduced while synergistically improving their heat transfer and light-to-heat conversion properties. In this work, the polyethylene glycol/MXene-cellulose aerogels (PMC) fs-CPCMs with simultaneously enhanced light-to-heat conversion, heat transfer and heat storage were prepared by one-step in situ encapsulation method based on freezing casting. The light-to-heat conversion efficiency of PMC fs-CPCMs achieved ∼ 91.6% due to the fact that the MXene acted as an effective photon captor and molecular heater under solar irradiation. The heat transfer of PMC fs-CPCMs was effectively improved by dispersed MXene due to the formation of heat conduction network or path. Importantly, the latent heats of PMC fs-CPCMs (about 183 J/g) were not reduced, because 90 wt% PEG was encapsulated in situ during the formation of pore structures of cellulose-Mxene aerogels under freezing casting. Moreover, the PMC fs-CPCMs showed excellent chemical compatibility and acceptable thermal stability.
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