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

材料导报

2023, Vol. 37

Issue (20): 22030234-6 https://doi.org/10.11896/cldb.22030234

高分子与聚合物基复合材料

可逆热致变色相变微胶囊的热响应及光热转换性能

王信刚^*, 雷为愉, 朱街禄, 张晨阳

南昌大学工程建设学院,南昌 330031

Thermal Response and Photothermal Conversion Performance of Reversible Thermochromic Phase Change Microcapsules

WANG Xingang^*, LEI Weiyu, ZHU Jielu, ZHANG Chenyang

School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China

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摘要为优化相变微胶囊对温度的响应效果,采用nano-Al₂O₃杂化三聚氰胺脲醛树脂壁材制备响应优化型可逆热致变色相变微胶囊。采用ESEM、FTIR、DSC、FLIR、UV-Vis和模拟光源表征微胶囊的微观形貌、化学结构、储热性能、热响应性能、反射率和光热转换性能,分析其响应优化型热致变色机理。结果表明,当nano-Al₂O₃的掺量达到5%时,RTPCMs-5%的相变潜热为118.13 J/g,包封率为72.4%(＞70%),导热率为0.238 7 W/(m·K),比RTPCMs-0%提升了61.3%。RTPCMs-5%的有机无机杂化外壳能够为声子提供高效的热传递通道,将定量的热能更加高效地传递到芯材并引起醌式结构的改变,使其具备优异的温度响应效果。RTPCMs-5%对550～630 nm的黄橙光波段有较强的吸收能力,在模拟太阳光源照射下光热转换效率为67.6%,比RTPCMs-0%提升了11.5%,展现出良好的光热转换性能。

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关键词: 响应优化相变微胶囊热致变色光热转换 nano-Al₂O₃

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

出版日期: 2023-10-25 发布日期: 2023-10-19

ZTFLH:

TB34

基金资助: 国家自然科学基金(52062032;51972158);江西省自然科学基金重点项目(20212ACB204017);江西省主要学科学术和技术带头人-领军人才资助项目(20204BCJ22001)

通讯作者: *王信刚,南昌大学工程建设学院教授、博士研究生导师。2007年武汉理工大学建筑材料与工程专业博士毕业后到南昌大学工作至今,目前主要从事绿色先进建筑材料方面的研究工作。发表论文120余篇,包括Chemical Engineering Journal、Composites Part B:Engineering、Composites Science and Technology、Journal of Colloid and Interface Science、Construction and Building Materials、Applied Clay Science、《硅酸盐学报》《材料研究学报》《建筑材料学报》等。wxglab@126.com

引用本文:

王信刚, 雷为愉, 朱街禄, 张晨阳. 可逆热致变色相变微胶囊的热响应及光热转换性能[J]. 材料导报, 2023, 37(20): 22030234-6.
WANG Xingang, LEI Weiyu, ZHU Jielu, ZHANG Chenyang. Thermal Response and Photothermal Conversion Performance of Reversible Thermochromic Phase Change Microcapsules. Materials Reports, 2023, 37(20): 22030234-6.

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http://www.mater-rep.com/CN/10.11896/cldb.22030234 或 http://www.mater-rep.com/CN/Y2023/V37/I20/22030234

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