可穿戴计算机
热的
相变
可穿戴技术
复合数
电子设备和系统的热管理
材料科学
相变材料
运动(物理)
相(物质)
人体运动
热运动
计算机科学
机械工程
复合材料
工程类
工程物理
物理
人工智能
热力学
嵌入式系统
量子力学
作者
Tianwen Luo,Lingli Kong,Luji Li,Junjie Lu,Zhiyu Yu,Baofeng Lin,Lihua Fu,Chuanhui Xu
标识
DOI:10.1016/j.cej.2024.150443
摘要
There is an urgent need to develop flexible materials with electrothermal/photothermal conversion and energy storage/release capabilities to meet the requirement of wearable personal thermal management (PTM) and health monitoring. Here, sandwich-structured phase change composites (SSPCCs) with PTM and health monitoring were prepared through film-forming and pressing process, in which a poly (ethylene vinyl acetate) (EVA)/poly (ethylene glycol) (PEG) composite was the middle layer, and waterborne polyurethane (WPU)/carbon nanotubes (CNTs) films were the top and bottom layers. The electrical conductivity and tensile strength of the two outer layers with 3 phr CNTs can achieve 2.83 S/m and 12.96 MPa, respectively. Due to the multiple synergistic effects of sandwich structure, the SSPCCs exhibit excellent flexibility with an elongation at break of approximately 1173 %, good stability and durability of 500 cycles and admirable electro-/photo-thermal heating performance (∼40 °C at 7 V or NIR light power of 50 mW/cm2). In addition, the inner layer, where the flexible EVA hold PEG well, has a melting latent heat of 71.45 J/g and freezing latent heat of 65.79 J/g in the phase change process as the mass ratio of PEG reached 50 wt%. The prepared composites show good abilities of information encryption and motions monitoring, which turns out great promising applications in wearable personal thermal management and medical devices.
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