Thermophysical properties investigation of phase change microcapsules with low supercooling and high energy storage capability:Potential for efficient solar energy thermal management

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外文摘要：Microencapsulation of phase change materials(MPCM)is an effective way to achieve solar energy man-agement.However,the crystallization of phase change materials(PCMs)in microcapsules will produce supercooling,which will affect the energy storage efficiency of MPCM.The incorporation of TiO2 nanopar-ticles into MPCM can alleviate supercooling.In this work,octadecyltrimethoxysilane(ODTMS)was used to modify the solid nucleating agent TiO2(m-TiO2)to improve its compatibility with n-Octadecane.Then,MPCM based on m-TiO2 nucleating agent,melamine-formaldehyde resin(MF)shell material,and n-Octadecane core material was prepared.Differential scanning calorimetry(DSC)results demonstrate that the supercooling degree(ΔT)of MPCM(MPCM-02)decreases to 0 ℃ with a tiny level of 0.25 wt％m-TiO2,while the MPCM with unmodified TiO2 is 6.1 ℃ and the MPCM without nucleating agent is 4.1 ℃.Be-sides,the phase change enthalpy(ΔHm)and encapsulation efficiency(E)of MPCM-02 remain at 183.7 J/g and 95.3％,respectively.Finally,phase change composite materials with photothermal conversion capa-bilities were constructed by MXenes,MPCM,and polyurethane acrylate(PUA).When 1 wt％MXenes and 30 wt％MPCM were incorporated into PUA matrix,the thermal conductivity and surface temperature af-ter 1200s of infrared light irradiation were 48.8％and 8.2 ℃ higher than pure PUA matrix.These results demonstrate the good solar energy storage capabilities of the MPCM,which possesses promising applica-tion potential in the field of solar energy thermal management and human thermal regulation.

外文关键词：

MicrocapsulesSupercooling degreeThermophysical propertiesSolar energy storageThermal management

作者：

Junfeng Shen、Yanqi Ma、Fan Zhou、Xinxin Sheng、Ying Chen

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作者单位：

Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter,School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China

Department of Polymeric Materials and Engineering,School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China

基金：

National Natural Science Foundation of ChinaGuangdong Basic and Applied Basic Research FoundationScientific and Technological Innovation Strategy Program of Guangdong Province:Guangdong-Hong Kong-Macao Technology Cooperat

项目编号：

U20A202992023A15150119852022A0505030026

出版年：

2024

DOI：

10.1016/j.jmst.2024.01.014

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCD

影响因子：0.657

ISSN：1005-0302

年,卷(期)：2024.191(24)