Octadecane-Encapsulated, Polyurethane PolyHIPE Composites with Flexibility and Stretchability for Personal Heat Management

作者：Xu, Jiale; Chen, Sheng; Wang, Junjie; Du, Jinghua; Dong, Xiaoyu; Zhang, Tao^*; Ren, Xiangjun; Liang, Guozhi; Zhang, Fenfen; Li, Xueliang; Yin, Haoyan; Liu, Chao; Ke, Ying^*; Zhao, Yan; Ding, Yunsheng^*

来源：ACS Applied Polymer Materials, 2023, 5(10): 7927-7935.

DOI：10.1021/acsapm.3c01167

• emulsion
• composite
• stretchability
• phase change material
• personal heat management

Emulsion-templated, phase change material-encapsulated monolithic composites are advantageous for latent heat storage, but their infrared behavior and lack of stretchability hamper many more potential applications. Here, we report the fabrication of octadecane (OD)-encapsulated monolithic composites with flexibility and stretchability and their application for personal heat management for the first time. The composites were formed from interfacial cross-linking between isocyanate and poly(vinyl alcohol), which served as a monomer and an emulsion stabilizer. The composites showed flexibility over or slightly below the ambient temperature, robust compression (without leakage and fracture at 70% compressive strain), and high stretchability with tensile strain up to 30%. The heat storage and release temperatures were similar to that of OD, close to human body temperature, and the composites exhibited quite high heat density (up to 231.6 J g(-1)) and high reusability (without obvious decreases in heat density after 400 heating-cooling cycles). Moreover, the composites were verified effectively to decrease mean skin temperature and mean torso temperature of the human body, demonstrating to be a good candidate for personal heat management.

• 单位
  苏州大学; 江南大学; y