碳纳米管
材料科学
各向异性
相变
化学工程
纳米技术
碳纤维
热的
相(物质)
复合材料
工程物理
化学
光学
复合数
有机化学
物理
工程类
气象学
作者
Nannan Zheng,Hao Pan,Zhenfei Chai,Zhimeng Liu,Feifei Gao,Ge Wang,Xiubing Huang
标识
DOI:10.1002/cssc.202301971
摘要
For the drawbacks of phase change materials such as poor shape stability and weak solar‐thermal conversion ability, a rotunda‐shaped carboxymethylcellulose/carbon nanotube aerogel (CA) with three‐dimensional network was constructed by freeze casting with a special mold, and then impregnated with polyethylene glycol (PEG) in this work. The PEG/CA had an enthalpy of 183.21 J/g, and a thermal conductivity of 0.324 W•m‐1K‐1, which was 57% higher than the pure PEG. The ability of PEG/CA to convert solar energy to thermal energy was a positive correlation between the inclusion of CNTs and the composite material's thermal conductivity. Under simulated sunlight, its solar‐thermal conversion efficiency reaches 94.41%, and after 10 min of irradiation, the surface temperature can reach 65 ℃ and the internal temperature can reach 44.67 ℃. This rotunda‐shaped PEG/CA is promising for the efficient use of renewable solar energy due to its strong solar‐thermal conversion and thermal storage capabilities.
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