Abstract
It is still a big challenge to develop state-of-art thermal energy storage materials based on phase-change materials (PCMs) with superior thermophysical properties and wearability for efficient advanced personal thermal management (PTM). A novel strategy for synthesizing thermal energy storage gel with sandwich structure by confining the inorganic PCM gel in the organic PCM gel was proposed to maximize the advantages of inorganic PCMs, organic PCMs and gel materials. Octadecane and sodium sulfate decahydrate were selected as the organic PCM and inorganic PCM, respectively to satisfy the requirements of the working temperature of PTM. The thermal energy storage gels with sandwich structure demonstrate superior thermophysical properties, such as the absence of supercooling (0 °C), high latent heat (158.65 J g−1), high form-stability (no leakage), high cyclic stability (200 cycles) and high economic benefits (4.85 × 10−3 ¥ J−1). Besides, they also have excellent wearability, such as high flexibility, self-healing feature and high biocompatibility. Due to the synergistic enhancement effect and various merits, the novel thermal energy storage gels are successfully utilized in the wearable PTM for human body thermal comfort. The inorganic–organic combination methodology is promising for the highly efficient applications of PCMs in the next-generation PTM.
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