摘要
本文以7-苯胺基-3-二乙氨基-6-甲基荧烷(ODB-1)为发色剂,2,2-双(4-羟基苯)丙烷(BPA)为显色剂,二十二醇为助溶剂,制备了热致变色复合相变材料(RT-CPCMs),研究了不同材料配比对RT-CPCMs的相变温度、相变潜热、光学特性、导热性能和稳定性的影响规律。结果表明随着温度升高RT-CPCMs呈现“黑色→浅黑色→无色透明”的颜色变化特性。在可见光区域,RT-CPCMs表现出较宽光谱吸收能力。随着二十二醇的质量分数的提升,RT-CPCMs的相变焓值也随之提高,并高于204.57 J/g。RT-CPCMs中C14、C24和C34的光热转换效率相较于二十二醇分别提高了104%、126%和154%,经500次热循环后相变焓值衰减率分别为1.02%、1.03%和0.70%。
This study prepared thermochromic composite phase change materials(RT-CPCMs)using 7-anilino-3-diethylamino-6-methylfluoran(ODB-1)as the color former,2,2-bis(4-hydroxyphenyl)propane(BPA)as the color developer,and docosanol as the solvent.The effects of different material ratios on the phase change temperature,latent heat of phase change,optical properties,thermal conductivity,and stability of RT-CPCMs were systematically investigated.Results revealed that RT-CPCMs exhibited a temperature-dependent color transition characteristic of“black→dark gray→colorless transparent”with increasing temperature.In the visible light region,RT-CPCMs demonstrated broad spectral absorption capacity.The phase change enthalpy of RT-CPCMs increased with the mass fraction of docosanol,exceeding 204.57 J/g.Compared to pure docosanol,the photothermal conversion efficiencies of C14,C24,and C34 in RT-CPCMs were enhanced by 104%,126%,and 154%,respectively.After 500 thermal cycles,the phase change enthalpy decay rates of these samples were 1.02%,1.03%,and 0.70%,indicating excellent thermal stability.
作者
杨鹏
张超成
黄坤
张光通
刘臣臻
饶中浩
YANG Peng;ZHANG Chaocheng;HUANG Kun;ZHANG Guangtong;LIU Chenzhen;RAO Zhonghao(Hebei Engineering Research Center of Advanced Energy Storage Technology and Equipment,School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China;Hebei Key Laboratory of Thermal Science and Energy Clean Utilization,School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China)
出处
《工程热物理学报》
北大核心
2026年第2期632-644,共13页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.52276060)
河北省自然科学基金(No.E2022202115)。
关键词
相变材料
热能储存
热致变色
光热转换
phase change material
thermal energy storage
thermochromic
photothermal conversion
