【作者】 杨雪薇； 沈衡； 赵宁； 徐坚；

【Author】 Xuewei Yang;Shen Heng;Ning Zhao;Jian Xu;Beijing National Laboratory for Molecular Science, Laboratory of Polymer Physics and Chemistry,Institute of Chemistry, Chinese Academy of Sciences;

【机构】 北京分子科学国家实验室中国科学院化学研究所高分子物理与化学实验室；

【摘要】 相变材料（PCMs）广泛应用于热管理领域。相变过程将潜热进行贮存和释放,能有效防止因热量的聚集和散失而发生的骤冷和过热现象,减缓器件的老化速率。但存在能量转化效率低和易泄漏等缺点[1]。本文将石蜡渗透到具有连续导热通路的六方氮化硼（h-BN）多孔骨架中[2],得到具有更高导热率与形态稳定性的PCMs。该材料h-BN含量为18 wt%;其熔化潜热为165.4±1.7 J/g;导热率高达0.85 W（m·K）^-1,与纯石蜡相比,热导率增加600%。此外,h-BN骨架赋予了PCMs在熔融石蜡状态下的形状稳定性[3]。更多还原

【Abstract】 Phase change materials（PCMs） are widely used in the field of thermal management. The phase change process stores and releases latent heat, which can effectively prevent quenching and overheating caused by heat accumulation and loss,and slow down the aging rate of the device. Nevertheless, there are disadvantages such as low energy conversion efficiency and easy leakage. In this paper, paraffin is infiltrated into a hexagonal boron nitride（h-BN） porous scaffolds form a continuous heat conduction path to obtain PCMs with higher thermal conductivity and morphological stability. The material has a h-BN content of 18 wt%; its latent heat of fusion is 165.4 ± 1.7 J/g; the thermal conductivity is as high as 0.85 W（m·K）^-1, and the thermal conductivity is increased by 600% compared with pure paraffin. In addition, the h-BN scaffolds endowed the PCMs shape stability under molten state of molten paraffin.更多还原