A newly designed paraffin@VO2 phase change material with the combination of high latent heat and large thermal conductivity

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:559

Article

Cheng, Tianshu^1,2  Wang, Ning⁴  Wang, Haixu^2,3  Sun, Rong¹  Wong, Ching-Ping⁵ 

[1] Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen Inst Adv Elect Mat, Shenzhen 518055, Guangdong, Peoples R China

[2] Univ Sci & Technol China, Dept Nano Sci & Technol Inst, Shenzhen 215123, Guangdong, Peoples R China

[3] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, Guangdong, Peoples R China

[4] Sun Yat Sen Univ, Sch Chem Engn & Technol, Guangzhou 510275, Guangdong, Peoples R China

[5] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

关键词: Paraffin wax;    VO2;    PCM;    Solid-liquid/Solid-solid transition;    Emulsion synthesis;    Thermal management;   

DOI  :  10.1016/j.jcis.2019.10.033

来源: Elsevier

【 摘 要 】

The paraffin is the widely used solid-liquid phase change material (PCM) with large fusion latent heat in thermal management, and vanadium dioxide (VO2) is a promising reversible solid-solid PCM with a near-ambient phase transition temperature (T-c = similar to 68 degrees C). In the real applications, the paraffin is always wrapped with inorganic or organic shells to stabilize the shape during the fusion/solidification with compromising large amounts of latent heat. Herein, we proposed the paraffin@VO2 PCM structure for the first time, which combines the solid-liquid paraffin PCM core and the solid-solid VO2 PCM shell. The paraffin@VO2 PCM structure is synthesized via an emulsion method starting with the Te/W-codoped VO2 microparticles and the paraffin wax (C26H54). This developed PCM structure shows a suitable T-c = 58.2 degrees C (Delta T-c = 5.5 degrees C), a decent fusion latent heat 163 J/g and a largely enhanced thermal conductivity 1.53 W/mK, which should be promising for the high-efficient thermal management applications. (C) 2019 Elsevier Inc. All rights reserved.

【 授权许可】

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