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Network Covalent Solids

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...

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Updated: Aug 31, 2025

Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets

Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets

Published on: November 7, 2016

Hyperbolic Graphene Framework with Optimum Efficiency for Conductive Composites.

Xiaoting Liu¹, Kai Pang¹, Huasong Qin²

¹MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University 38 Zheda Road, Hangzhou 310027, China.

|August 24, 2022

Summary

This summary is machine-generated.

Researchers used geometric curvature in 2D sheets to create efficient conductive polymer composites. This novel hyperbolic graphene framework significantly enhances electrical and thermal conductivity for advanced applications.

Keywords:

composites graphene framework hyperbolic structure optimally enhancing efficiency thermal and electrical conductivity

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Area of Science:

Materials Science
Polymer Science
Nanotechnology

Background:

Efficient conductive filler networks are crucial for functional polymer composites.
Two-dimensional (2D) sheets have limitations in enhancing conductivity beyond dispersion homogeneity.

Purpose of the Study:

To overcome the efficiency limit of 2D sheets in conductive nanocomposites.
To introduce hyperbolic curvature to reconcile 2D topology with 3D conductive pathways.

Main Methods:

Exploiting geometric curvature of 2D sheets.
Utilizing hyperbolic curvature concept for filler systems.
Fabricating hyperbolic graphene aerogel framework.

Main Results:

Achieved record efficiency in enhancing electrical and thermal conductivity.
Demonstrated high thermal conductivity (31.6 W/(mK)) and electrical conductivity (13,911 S/m) at 1.6% volume loading.
Developed conductive nanocomposites with a hyperbolic graphene aerogel framework.

Conclusions:

Hyperbolic curvature offers a geometrically optimal filler system for multifunctional nanocomposites.
This approach breaks the efficiency limit of 2D sheets in conductive applications.
Applications include thermal management, sensing, and electromagnetic shielding.