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Updated: May 17, 2026
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Functionalization and Dispersion of Carbon Nanomaterials Using an Environmentally Friendly Ultrasonicated Ozonolysis Process
Published on: May 30, 2017
Graphene Stable Dispersion Driven by Noncovalent Functionalization and Graphene Fibers Preparation.
Jinchang Liu1, Xue Han1, Qijun Yu2,3
1School of Chemical & Environmental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|May 15, 2026
Summary
This study introduces a novel noncovalent strategy to stabilize graphene dispersion, enabling direct fabrication of high-performance graphene fibers (GFs) without using graphene oxide. This method enhances GFs
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Science
Background:
- Graphene fibers (GFs) are promising due to their electrical conductivity and flexibility.
- Current GF production relies on wet-spinning of graphene oxide, limiting scalability.
- Instability of graphene self-assembly in liquid phases hinders direct fabrication methods.
Purpose of the Study:
- To develop a noncovalent interaction-driven strategy for stabilizing graphene dispersion.
- To elucidate dispersion mechanisms and interfacial interactions for graphene-polyacrylonitrile composites.
- To enable direct, scalable fabrication of high-performance graphene fibers.
Main Methods:
- Molecular dynamics simulations to study dispersant behavior.
- Spectroscopic characterizations: TEM, XPS, Raman spectroscopy.
- X-ray scattering (WAXS/SAXS) to analyze fiber structure.
Main Results:
- Zwitterionic dispersants, particularly CAB, enabled stable graphene dispersion.
- Synergistic interactions in CAB prevented graphene aggregation and interfacial slippage.
- GFs achieved high tensile strength (152 MPa) and Young's modulus (225 GPa).
- Fibers exhibited a highly ordered, porous structure aligned along the fiber axis.
Conclusions:
- A scalable, efficient route for direct GFs fabrication was established, bypassing graphene oxide.
- Noncovalent stabilization strategies offer significant insights for interfacial engineering in carbonaceous materials.
- This method paves the way for advanced, high-performance graphene fiber applications.
