Numerous researches have drawn on the polymer-based thermal conductive composites to cope with heat dissipation issue both in the integrated electronics and human body. However, the limited thermal conductivity and mono-cooling mode even in the high filler content are always restricted its further application. Currently, the use of latent heat from phase transition has aroused researchers’ appetite for the thermal management. Herein, inspired by the sweat modulating the body temperature, a passive dual thermal management strategy was proposed by taking advantage of high latent heat and the improved thermal conductivity, where the liquid-vapor phase transition of water inside the MOF coated on the polymer-based composites to form the heterogeneous composites. In the proof-of-concept test, the obtained MIL-101 (Cr) MOF as the sorbent owned the high specific surface area of 1850 cm/g, cyclic water uptake of 1.18 g and phase change enthalpy of 1780 J/g, which promoted the well spontaneous adsorption and desorption ability of water. While sulfur surface modified boron nitride/natural rubber composites (BN-S/NR) exhibited the excellent anisotropic thermal conductivity (11.48 W m K) in the through-plane direction at the filler loading of 70 wt%. After the MIL-101 (Cr) MOF coated composites (MOF-BN-S/NR) with heterogeneous structure, the composites with 0.07 g MOF possessed the pretty cooling performance and thermal stability to adjust temperature at a proper range both in electronics and human body because of the dual passive heat dissipation approach. Therefore, these findings provide the meaningful insight into research to fabricate composites with heterogeneous-assisted heat dissipation in thermal management.

中文翻译：

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MOF 装饰的异质结构氮化硼/天然橡胶复合材料，基于改进的导热率和水吸附-解吸过程，通过双被动冷却模式用于热管理应用


许多研究都利用聚合物基导热复合材料来解决集成电子和人体的散热问题。然而，即使在高填料含量下，有限的导热率和单冷却模式始终限制了其进一步的应用。目前，利用相变潜热引起了研究人员对热管理的兴趣。受汗液调节体温的启发，利用高潜热和改进的导热性，提出了一种被动双热管理策略，其中 MOF 内的水的液-汽相变涂覆在聚合物基材料上。复合材料形成异质复合材料。在概念验证测试中，获得的MIL-101（Cr）MOF作为吸附剂具有1850 cm/g的高比表面积、1.18 g的循环吸水量和1780 J/g的相变焓，促进水的良好自发吸附和解吸能力。而硫表面改性氮化硼/天然橡胶复合材料（BN-S/NR）在填料含量为 70 wt% 时，在平面方向上表现出优异的各向异性导热系数 (11.48 W m K)。在具有异质结构的 MIL-101 (Cr) MOF 涂层复合材料 (MOF-BN-S/NR) 后，含有 0.07 g MOF 的复合材料具有良好的冷却性能和热稳定性，可在电子和人体中将温度调节在适当的范围内机身由于采用了双被动散热方式。因此，这些发现为在热管理中制造具有异质辅助散热的复合材料的研究提供了有意义的见解。