膨脹石墨和碳納米管涂層對(duì)相變材料性能的影響

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關(guān)鍵詞：膨脹石墨；相變材料；膨脹珍珠巖；碳納米管；光熱轉(zhuǎn)換中圖分類號(hào)：TK124文獻(xiàn)標(biāo)志碼：ADOI：10.7652/xjtuxb202506007 文章編號(hào)：0253-987X（2025）06-0063-10

Effect of Expanded Graphite and Carbon Nanotubes Coating on Phase Change Materials Properties

ZHAO Xinbol，QU Zhiguo1，ZHANG Jianfei1，JIANG Zhiyuan2 （1.MOE Key Laboratoryof Thermo-Fluid Science and Engineering，Xi'an Jiaotong University，Xi'an 71o049，China; 2. School of Chemical Engineering，Xi'an Jiaotong University，Xi'an 71O049，China）

Abstract： A low-cost and user friendly method for adding coatings is proposed to address the current issue of relatively complex and costly preparation of composite phase change materials for photothermal conversion and storage. The expanded graphite and carbon nanotubes were used for improving the solar thermal conversion and storage performance of paraffin wax/expand perlite composite. The effect of different mass ratios of expanded graphite and carbon nanotubes on solar thermal conversion and storage at varying solar intensities was investigated. The results of the solar-thermal experiment indicated that the thermal energy storage rate of the pure paraffin wax and parafin wax/expand perlite could be improved by adding expanded graphite. In comparison with pure paraffin wax and paraffin wax/expand perlite， the heat energy storage rate of composites with expanded graphite content was improved two times and O.63 times， respectively.

The addition of carbon nanotubes coating could effectively improve solar thermal performance. The photothermal conversion efficiencies for paraffin wax and parafin wax/expand perlite were improved by a factor of 1. 82 and O.6，respectively. With the cycle time increasing，the photothermal converting property of the composite declined and maintained steady after a certain cycle. The steady maximum temperature was about 65°C ． The photothermal conversion efficiency of most of the studied samples was below 90% ，and the photothermal conversion efficiency of this study could reach 90. 76% . Therefore， the addition of carbon nanotubes to the surface of composite phase change materials has been demonstrated as a simple and effective strategy to improve the photothermal conversion performance.

Keywords： expanded graphite； phase change materials；expanded perlite； carbon nanotubes;photothermal conversion

利用太陽能是替代不可再生的化石燃料，以實(shí)現(xiàn)綠色發(fā)展的可行方法。（剩余16812字）