Abstract In this work, form-stable phase change composites (PCCs) with high thermal conductivity and adjustable thermal management capacity are prepared based on phase change microcapsules (SiO2@SA) and surface-modified boron nitride (m-BN). The phase change properties are successfully infused into PCCs through the incorporation of microcapsules and the thermal conductivity can be elevated up to 0.506 Wm-1K-1. Furthermore, the phase change enthalpies of PCCs can be facilely tailored from 3.74 J/g to 18.52 J/g by changing the loading fraction of microcapsule, enabling adjustable thermal energy storage and thermal management ability. PCCs are proved to possess outstanding long-term stability even after 500 cycles of charging-discharging. Besides, practical application of PCCs as thermal regulating materials is explored through a self-designed temperature control system. Finally, the PCCs exhibit good leakage proof property at 100 °C due to the shielding effect of SiO2 shell. These results show that this work offers a promising strategy for the development of advanced form-stable PCCs with good comprehensive properties.

中文翻译：

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具有高导热性和可调热管理能力的形状稳定相变复合材料

摘要 在这项工作中，基于相变微胶囊（SiO2@SA）和表面改性氮化硼（m-BN）制备了具有高导热性和可调热管理能力的形状稳定相变复合材料（PCCs）。通过加入微胶囊，相变特性成功地注入到 PCC 中，热导率可以提高到 0.506 Wm-1K-1。此外，通过改变微胶囊的负载分数，PCCs 的相变焓可以轻松地从 3.74 J/g 调整到 18.52 J/g，从而实现可调节的热能储存和热管理能力。事实证明，即使经过 500 次充放电循环后，PCC 仍具有出色的长期稳定性。除了，通过自行设计的温度控制系统探索了 PCC 作为热调节材料的实际应用。最后，由于 SiO2 壳的屏蔽作用，PCC 在 100°C 下表现出良好的防漏性能。这些结果表明，这项工作为开发具有良好综合性能的先进形状稳定 PCC 提供了一种有前景的策略。