Excellent thermal management capacity is urgently required to tackle booming heat flux density of electronic devices. As an attractive building block in constructing functional materials, graphene oxide (GO) is plagued with low thermal conductivity (TC). In this contribution, we constructed aligned hybrid network in the GO film to ameliorate multifaceted performance. Silicon carbide nanowires (SiCNWs) were first functionalized by polydopamine (PDA) to improve the dispersed ability and the interfacial interaction with GO sheets. Subsequently, effective thermally conductive pathways were paved by oriented arrangement of SiCNW@PDA and GO sheets. The resultant composite film presented excellent in-plane TC of 29.4 W/mK and ultrahigh anisotropy ratio of ~12,800% by introducing 80 wt% SiCNW@PDA. In addition, temperature stability and fatigue reliability were also favourable. More intriguingly, flame resistance was integrated in the composite films due to incorporation of noncombustible SiCNW framework. Our work offers a paradigmatic means to fabricate multifunctional thermal management materials.

迫切需要出色的热管理能力来应对电子设备日益增长的热通量密度。作为构造功能材料的有吸引力的组成部分，氧化石墨烯（GO）的导热系数（TC）低。在这项贡献中，我们在GO影片中构建了对齐的混合网络，以改善多方面的性能。首先通过聚多巴胺（PDA）对碳化硅纳米线（SiCNW）进行功能化，以提高其分散能力以及与GO片材的界面相互作用。随后，通过SiCNW @ PDA和GO板的定向排列，铺设了有效的导热路径。通过引入80 wt％的SiCNW @ PDA，所得复合膜呈现出29.4 W / mK的优异面内TC和约12,800％的超高各向异性。此外，温度稳定性和疲劳可靠性也是有利的。更有趣的是，由于掺入了不可燃的SiCNW骨架，阻燃性被整合到了复合薄膜中。我们的工作为制造多功能热管理材料提供了一种范式方法。