Environment-friendly cellulose bioplastic is a promising material to replace fossil-fuel plastic for the more sustainable future. In present study, we reported a functional cellulose bioplastic that can be used for thermal management. The cellulose bioplastic was easily fabricated by impregnating three-dimensional graphene aerogel (GA) into the cellulose solution and then hot-pressed. The cellulose/GA composites exhibited enhanced isotropic thermal conductivity and good mechanical performance. The thermal conductivity of the cellulose/GA composite was 0.67 W m⁻¹ K⁻¹ in vertical direction increasing by 219% and 0.72 W m⁻¹ K⁻¹ in parallel direction, increasing by 44% respectively. Meanwhile, the hardness of the composites reached to 148 MPa and the Young's modulus is 2.3 GPa, superior to those of most common plastics, such as Nylon and Polymethyl methacrylate (PMMA). The integrated performance of the composites could be attributed to the formation of efficient thermally conductive network and the good adhesion between the graphene cell wall and the cellulose.

环保的纤维素生物塑料是一种有前途的材料，可以替代化石燃料塑料，从而实现更可持续的未来。在本研究中，我们报告了一种可用于热管理的功能性纤维素生物塑料。通过将三维石墨烯气凝胶（GA）浸渍到纤维素溶液中，然后进行热压，可以轻松制造纤维素生物塑料。纤维素/ GA复合材料表现出增强的各向同性导热性和良好的机械性能。纤维素/ GA复合材料的导热率在垂直方向上为0.67 W m ^-1  K ^-1，增加了219％，在垂直方向上为0.72 W m ^-1  K ^-1在平行方向上，分别增加了44％。同时，复合材料的硬度达到148 MPa，杨氏模量为2.3 GPa，优于尼龙和聚甲基丙烯酸甲酯（PMMA）等最常见的塑料。复合材料的综合性能可归因于有效导热网络的形成以及石墨烯细胞壁与纤维素之间的良好粘合性。