用于电子器件热管理的石蜡基复合相变材料普遍存在刚性强、导热系数低和易燃等缺点。在此，制备了一种由石蜡（PA）/烯烃嵌段共聚物（OBC）/MXene组成的柔性阻燃复合相变材料（CPCM），以进行高效、安全的热管理。OBC 的聚合物网络和MXene的层状多孔结构实现了 PA 的双耦合封装，因此 PA/OBC/MXene CPCM 表现出优异的热稳定性和高相对热效率（≥97%）。得益于 OBC 的相分离结构和 MXene 的光热转换能力，热敏柔性 CPCM 具有热/光驱动的形状记忆特性和 89.60% 的自愈效率。MXene 可以提高导热性CPCM 的 2.3 倍以上，有利于快速传热和散热，无热管理和使用 PA 和 PA/OBC/MXene 作为热管理材料的太阳能电池平均温度分别为 64.7 °C、53.5 °C 和 47.5 °C ， 分别。此外，MXene 显着增强了 CPCM 的阻燃性，可在 12 秒内自熄。总体而言，目前的柔性复合相变材料具有更高的导热性、形状适应性和阻燃性，在热管理、快速散热和安全运行方面具有广阔的应用前景。

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Paraffin-based composite phase change materials used for thermal management of electronic devices generally suffers the defects of strong rigidity, low thermal conductivity and flammability. Herein, a flexible and flame retardant composite phase change material (CPCM) of paraffin (PA)/olefin block copolymer (OBC)/MXene is prepared to conduct efficient and safe thermal management. The polymer network of OBC and the layered porous structure of MXene achieve double coupling encapsulation of PA, so PA/OBC/MXene CPCM shows superior thermal stability and high relative enthalpy efficiency (≥97%). Benefiting from phase separation structure of OBC and the photo-thermal conversion capability of MXene, the thermal sensitive flexible CPCM exhibits thermal/light driven shape memory property and self-healing efficiency of 89.60%. The MXene can enhance thermal conductivity of CPCM above 2.3 times that of PA to facilitate rapid heat transfer and dissipation, and the average solar cell temperatures without thermal management and using PA and PA/OBC/MXene as thermal management material are 64.7 °C, 53.5 °C and 47.5 °C, respectively. Moreover, the MXene notably enhances the flame retardancy of CPCM, which can self-extinguish within 12 s. In general, present flexible composite phase change materials achieves higher thermal conductivity, shape adaptation and fire retardancy properties, and those have promising applications in thermal management with rapid heat dispersion and safe operation.