Highly thermal conductive phase change composites containing Ag-welding graphene framework with excellent solar-thermal conversion and rapid heat transfer ability

被引：20

作者：

Zhang, Di ^{[1
]}

Zhou, Bing ^{[1
]}

Yu, Jie ^{[1
]}

He, Chengen ^{[2
]}

Wang, Bo ^{[1
]}

Feng, Yuezhan ^{[1
]}

Liu, Chuntai ^{[1
]}

Shen, Changyu ^{[1
]}

机构：

[1] Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Key Lab Mat Proc & Mold, Minist Educ, Zhengzhou 450002, Peoples R China

[2] Wuhan Text Univ, Sch Mat Sci & Engn, State Key Lab New Text Mat & Adv Proc Technol, Wuhan 430200, Peoples R China

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2022年 / 161卷

基金：

中国国家自然科学基金;

关键词：

Polymer-matrix composites (PMCs); Graphene; Thermal properties; Microstructures;

D O I：

10.1016/j.compositesa.2022.107128

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The anisotmpic three-dimensional (3D) Ag-welding graphene framework prepared by unidirectional ice-templating freezing casting, was used to encapsulate polyethylene glycol (PEG) as phase change material (PCM) composite in this work. Arising from the decreased interfacial thermal resistance (ITR) in graphene skeleton by Ag-welding and the vertically oriented graphene skeleton as phonon transfer paths, the obtained PCM composite exhibited a high thermal conductivity of 4.3 W m(-1) K-1 at graphene loading of similar to 6.25 vol%, which improved significantly the heat transfer rate during the heat charging/discharging processes. Meanwhile, the graphene framework gave the PCM composite an excellent solar-thermal conversion ability, which could be further enhanced by Ag-welding strategy. Besides, the 3D porous framework with huge capillary and surface tension forces effectively improved the shape stability and avoided leakage of PCM, with meanwhile remaining high energy storage capacities (147.4-165.9 J g(-1)). Therefore, the Ag-welding 3D graphene framework reveals the high potential to encapsulate PCM using in solar-thermal conversion field.

引用

页数：10

共 62 条

[1] An eco-friendly and facile montmorillonite nanosheets aerogel based phase change materials for efficient solar-to-thermal energy conversion [J].