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Hyperbolic Graphene Framework with Optimum Efficiency for Conductive Composites
ACS Nano ( IF 15.8 ) Pub Date : 2022-08-24 , DOI: 10.1021/acsnano.2c05414
Xiaoting Liu 1 , Kai Pang 1 , Huasong Qin 2 , Yilun Liu 2 , Yingjun Liu 1 , Chao Gao 1 , Zhen Xu 1
ACS Nano ( IF 15.8 ) Pub Date : 2022-08-24 , DOI: 10.1021/acsnano.2c05414
Xiaoting Liu 1 , Kai Pang 1 , Huasong Qin 2 , Yilun Liu 2 , Yingjun Liu 1 , Chao Gao 1 , Zhen Xu 1
Affiliation
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Constructing conductive filler networks with high efficiency is essential to fabricating functional polymer composites. Although two-dimensional (2D) sheets have prevailed in nanocomposites, their efficiency in enhancing conductive functions seems to reach a limit, as if merely addressing the dispersion homogeneity. Here, we exploit the unrecognized geometric curvature of 2D sheets to break the efficiency limit of filler systems. We introduce the hyperbolic curvature concept to mediate the incompatibility between 2D planar topology and 3D filler space and hold the efficient conductive path through face-to-face contact. The hyperbolic graphene framework exhibits a record efficiency in enhancing electrically and thermally conductive functions of nanocomposites. At a volume loading of only 1.6%, the thermal and electrical conductivities reach 31.6 W/(mK) and 13 911 S/m, respectively. We demonstrate that the conductive nanocomposites with a hyperbolic graphene aerogel framework are useful for thermal management, sensing, and electromagnetic shielding. Our work provides a solution to reconcile the incompatibility between the 2D planar structure of sheets and the highly expected 3D conductive path, presenting a geometrically optimal filler system to break the efficiency limit of multifunctional nanocomposites and broaden the structural design space of 2D sheets by curvature modulation to meet more applications.
中文翻译：
具有最佳导电复合材料效率的双曲石墨烯框架
构建高效的导电填料网络对于制造功能性聚合物复合材料至关重要。尽管二维（2D）片材在纳米复合材料中占主导地位，但它们在增强导电功能方面的效率似乎达到了极限，就好像仅仅解决了分散均匀性一样。在这里，我们利用二维片材无法识别的几何曲率来打破填充系统的效率限制。我们引入双曲曲率概念来调解 2D 平面拓扑和 3D 填充空间之间的不相容性，并通过面对面接触保持有效的导电路径。双曲线石墨烯框架在增强纳米复合材料的导电和导热功能方面表现出创纪录的效率。在仅 1.6% 的体积负载下，热导率和电导率达到 31。分别为 6 W/(mK) 和 13 911 S/m。我们证明了具有双曲线石墨烯气凝胶框架的导电纳米复合材料可用于热管理、传感和电磁屏蔽。我们的工作提供了一种解决方案来协调片材的 2D 平面结构与高度预期的 3D 导电路径之间的不相容性，提出了一种几何优化的填料系统，以打破多功能纳米复合材料的效率限制，并通过曲率调制拓宽 2D 片材的结构设计空间满足更多应用。
更新日期：2022-08-24
中文翻译：
具有最佳导电复合材料效率的双曲石墨烯框架
构建高效的导电填料网络对于制造功能性聚合物复合材料至关重要。尽管二维（2D）片材在纳米复合材料中占主导地位，但它们在增强导电功能方面的效率似乎达到了极限，就好像仅仅解决了分散均匀性一样。在这里，我们利用二维片材无法识别的几何曲率来打破填充系统的效率限制。我们引入双曲曲率概念来调解 2D 平面拓扑和 3D 填充空间之间的不相容性，并通过面对面接触保持有效的导电路径。双曲线石墨烯框架在增强纳米复合材料的导电和导热功能方面表现出创纪录的效率。在仅 1.6% 的体积负载下，热导率和电导率达到 31。分别为 6 W/(mK) 和 13 911 S/m。我们证明了具有双曲线石墨烯气凝胶框架的导电纳米复合材料可用于热管理、传感和电磁屏蔽。我们的工作提供了一种解决方案来协调片材的 2D 平面结构与高度预期的 3D 导电路径之间的不相容性，提出了一种几何优化的填料系统，以打破多功能纳米复合材料的效率限制，并通过曲率调制拓宽 2D 片材的结构设计空间满足更多应用。
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