可逆热致变色相变微胶囊的热响应及光热转换性能

doi:10.11896/cldb.22030234

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Abstract In order to optimize the response effect of phase change microcapsules of temperature, nano-Al₂O₃ hybrid melamine-urea-formaldehyde resin wall material was used to prepare the response-optimized reversible thermochromic phase change microcapsules. The morphology, chemical structure, thermal storage performance, thermal response performance, reflectivity and photothermal conversion performance of the microcapsules were characterized by ESEM, FTIR, DSC, FLIR, UV-Vis and simulated light source, and the response-optimized thermochromic mechanism was analyzed. The results showed that when the content of nano-Al₂O₃ reached 5%, the phase change latent heat for RTPCMs-5% was 118.13 J/g, the encapsulation efficiency was 72.4% (＞70%), and the thermal conductivity was 0.238 7 W/(m·K), which was 61.3% higher than RTPCMs-0%. The organic-inorganic hybrid shell of RTPCMs-5% can provide efficient heat transfer channels for phonons to transfer the quantitative heat energy to the core material more efficiently and cause the change of quinoid structure, so that it has excellent temperature response effect. RTPCMs-5% had strong absorption capacity for the wavelength range of 550—630 nm of yellow-orange light. Under the irradiation of simulated solar light source, the photothermal conversion efficiency was 67.6%, which was 11.5% higher than RTPCMs-0%, showing good photothermal conversion performance.

Key words： response optimization phase change microcapsules thermochromic photothermal conversion nano-Al₂O₃

Published: 25 October 2023 Online: 2023-10-19

CLC number:

TB34

Fund:National Natural Science Foundation of China (52062032,51972158), Jiangxi Provincial Natural Science Foundation (20212ACB204017) and Major Discipline Academic and Technical Leaders Training Program of Jiangxi Province (20204BCJ22001).

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	WANG Xingang
	LEI Weiyu
	ZHU Jielu
	ZHANG Chenyang

Cite this article:

WANG Xingang,LEI Weiyu,ZHU Jielu, et al. Thermal Response and Photothermal Conversion Performance of Reversible Thermochromic Phase Change Microcapsules[J]. Materials Reports, 2023, 37(20): 22030234-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22030234 OR http://www.mater-rep.com/EN/Y2023/V37/I20/22030234

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