材料科学
灵活性(工程)
复合数
可穿戴计算机
相变
大气温度范围
可穿戴技术
航程(航空)
相(物质)
光电子学
纳米技术
工程物理
复合材料
热力学
计算机科学
嵌入式系统
工程类
物理
统计
数学
化学
有机化学
作者
Luying Chen,Liushan Luo,Zhiping Mao,Bijia Wang,Xueling Feng,Xiaofeng Sui
标识
DOI:10.1021/acsami.3c17269
摘要
Flexible electrothermal composite phase change materials (PCMs) are promising candidates for portable thermotherapy. However, a great challenge remains to achieve high PCM loading while maintaining reasonable flexibility. Herein, the polypyrrole-decorated melamine foam (PPy@MF) was fabricated and thereafter applied to confine binary PCM mixtures composed of a high-enthalpy long-chain polyethylene glycol (PEG4000) and its short-chain homologue (PEG200) to make the novel PPy@MF-PEG4000+200 composite PCM. At a high loading of up to 74.1% PEG4000 and a high latent heat energy storage density of 150.1 J/g, the composite PCM remained flexible at temperature (-20 °C) far below its phase transition point thanks to the plasticine effect of PEG200. The composite also demonstrated good Joule heating performance, providing fast heating from 28 to 70 °C at low applied voltages (4.5-6.0 V). The energy could be stored efficiently and released to maintain the composites at the proper temperature. The electrothermal performance of the composite remained undisturbed during curved or repeated bending, showing good potential to be used for personal thermal management and thermotherapy.
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