1. The Effect of Hydroxylated Multi-Walled Carbon Nanotubes on the Properties of Peg-Cacl2 Form-Stable Phase Change Materials
- Author
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Xuelai Zhang, Hua Weisan, Xinfeng Wu, Mao Fa, and Lingyu Zheng
- Subjects
Control and Optimization ,Materials science ,Mean free path ,020209 energy ,Energy Engineering and Power Technology ,02 engineering and technology ,Polyethylene glycol ,Carbon nanotube ,lcsh:Technology ,law.invention ,chemistry.chemical_compound ,Thermal conductivity ,law ,Latent heat ,PEG ratio ,0202 electrical engineering, electronic engineering, information engineering ,Interfacial thermal resistance ,thermal conductivity ,MWCNTs ,Electrical and Electronic Engineering ,Engineering (miscellaneous) ,form-stable phase change materials ,lcsh:T ,Renewable Energy, Sustainability and the Environment ,021001 nanoscience & nanotechnology ,PEG ,Phase-change material ,chemistry ,Chemical engineering ,0210 nano-technology ,Energy (miscellaneous) - Abstract
Calcium ions can react with polyethylene glycol (PEG) to form a form-stable phase change material, but the low thermal conductivity hinders its practical application. In this paper, hydroxylated multi-walled carbon nanotubes (MWCNTs) with different mass are introduced into PEG1500·CaCl2 form-stable phase change material to prepare a new type of energy storage material. Carbon nanotubes increased the mean free path (MFP) of phonons and effectively reduced the interfacial thermal resistance between pure PEG and PEG1500·CaCl2 3D skeleton structure. Thermal conductivity was significant improved after increasing MWCNTs mass, while the latent heat decreases. At 1.5 wt%, composite material shows the highest phase change temperature of 42 °C, and its thermal conductivity is 291.30% higher than pure PEG1500·CaCl2. This article can provide some suggestions for the preparation and application of high thermal conductivity form-stable phase change materials.
- Published
- 2021