Abstract To deal with the heat dissipation problem produced by a high integrated circuit, the preparation of heat spreaders with excellent heat transportation performance is increasing in demand. The Ti3C2 MXene sheets and copper particles were fully contacted with cellulose nanofibers by a high-speed mixer, and the composite film was prepared as a heat spreader under the action of the vacuum-assisted filtration. The MXene sheets are connected by the esterification of the carboxyl group in MXene and the hydroxyl group in cellulose nanofibers to form a chemical bond and consist of the main skeleton of the composite film. Due to the synergistic effects of MXene and copper particles, the in-plane and out-of-plane thermal conductivities of the composite film reach 24.96 and 2.46 W m−1 K−1, respectively. Compared with the pure cellulose nanofiber films, the thermal conductivity of composite films increased by 2819.2 and 187.6%, respectively. By designing two applications of composite films in the actual use process, the excellent heating conduction abilities in two directions have been proved. This measure to improve the thermal conductivities of composite films by MXene-copper binary fillers also provides ideas for the novel heat spreader.

中文翻译：

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具有增强导热性的柔性 MXene/铜/纤维素纳米纤维散热器薄膜

摘要 为解决高集成电路产生的散热问题，制备具有优良传热性能的散热器的需求日益增加。Ti3C2 MXene片材和铜颗粒通过高速混合器与纤维素纳米纤维充分接触，在真空辅助过滤的作用下制备复合膜作为散热器。MXene片材通过MXene中的羧基与纤维素纳米纤维中的羟基发生酯化反应形成化学键，构成复合薄膜的主骨架。由于 MXene 和铜颗粒的协同作用，复合薄膜的面内和面外热导率分别达到 24.96 和 2.46 W m-1 K-1。与纯纤维素纳米纤维薄膜相比，复合薄膜的热导率分别提高了2819.2%和187.6%。通过设计复合膜在实际使用过程中的两种应用，证明了其在两个方向上的优异导热能力。这种通过 MXene-铜二元填料提高复合薄膜导热性的措施也为新型散热器提供了思路。