A three-dimensional multilayer graphene web for polymer nanocomposites with exceptional transport properties and fracture resistance†,Materials Horizons

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A three-dimensional multilayer graphene web for polymer nanocomposites with exceptional transport properties and fracture resistance†
Materials Horizons ( IF 12.2 ) Pub Date : 2018-01-10 00:00:00 , DOI: 10.1039/c7mh00984d
Xi Shen _{1,

2,

3,

4} , Zhenyu Wang _{1,

2,

3,

4} , Ying Wu _{1,

2,

3,

4} , Xu Liu _{1,

2,

3,

4} , Yan-Bing He _{5,

6,

7,

8,

9} , Qingbin Zheng _{1,

2,

3,

4} , Quan-Hong Yang _{5,

6,

7,

8,

9} , Feiyu Kang _{5,

6,

7,

8,

9} , Jang-Kyo Kim _{1,

2,

3,

4}

Affiliation

Small amounts of two-dimensional (2D) graphene sheets are usually added into a polymer matrix to fabricate nanocomposites with improved mechanical and functional properties. Further enhancements of these properties beyond those of ordinary nanocomposites require much higher loadings of well-dispersed fillers, preferably in the form of an interconnected network with the preferential orientation along the direction of interest. However, the assembly of 2D fillers to form such a three-dimensional (3D) network remains a formidable task. Herein, a totally new approach is developed to fabricate a high-density 3D multilayer graphene web with interconnected, in-plane oriented graphene struts based on the versatile chemical vapor deposition technique. The continuous high-quality graphene network within the epoxy composites leads to exceptional electrical and thermal conductivities of 50 S cm⁻¹ and 8.8 Wm⁻¹ K⁻¹, respectively. The high filler loading of 8.3 wt% also gives rise to a remarkable fracture toughness of 2.18 MPa m^1/2, well over 100% enhancement over the neat epoxy. The simultaneous achievements of both remarkable transport properties and fracture toughness at these levels by an identical nanocomposite are unprecedented and have never been reported previously. The combination of unrivalled electrical and thermal conductivities with extraordinary fracture resistance offers the composites unique opportunities for multi-functional applications.

中文翻译：

用于聚合物纳米复合材料的三维多层石墨烯纤维网，具有出色的传输性能和抗断裂性†

通常将少量的二维（2D）石墨烯片材添加到聚合物基质中，以制造具有改善的机械和功能特性的纳米复合材料。这些性能的进一步增强超出了普通纳米复合材料的性能，需要高得多的负载量的分散良好的填充剂，优选呈互连网络的形式，其具有沿感兴趣方向的优先取向。但是，组装2D填充物以形成这样的三维（3D）网络仍然是一项艰巨的任务。在此，基于通用的化学气相沉积技术，开发了一种全新的方法来制造具有互连的面内定向的石墨烯撑杆的高密度3D多层石墨烯纤维网。^-1和8.8 Wm^-1 K^-1。8.3 wt％的高填充量还产生了2.18 MPa m^1/2的显着断裂韧性，比纯环氧树脂高出100％以上。相同的纳米复合材料在这些水平上同时实现了卓越的传输性能和断裂韧性，这是前所未有的，而且从未有过报道。无与伦比的导电性和导热性与出色的抗断裂性相结合，为复合材料提供了多功能应用的独特机会。

更新日期：2018-01-10

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