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Updated: Sep 27, 2025
Functionalization and Dispersion of Carbon Nanomaterials Using an Environmentally Friendly Ultrasonicated Ozonolysis Process
Published on: May 30, 2017
Green modification of graphene dispersion with high nanosheet content, good dispersibility, and long storage
Minghua Li1,2,3, Xiaoyu Lu1,2, Jiajia Jiang1,2
1School of Energy Materials and Chemical Engineering, Hefei University Hefei Anhui 230601 China liminghua@hfuu.edu.cn.
Abstract:
In this work, an easy, green, noncovalent surface modification of pristine graphene (GR) was carried out using a single-step method between sodium carboxymethyl cellulose (CMC) and pristine GR, resulting in the formation of a modified CMC-GR (CGR) dispersion with 15% nanosheet content, the first reported in water. Results obtained from thermogravimetry analysis (TGA), Raman spectroscopy, and atomic force microscopy (AFM) confirm that the CMC modifier is successfully decorated on the pristine GR surface. Analyses of transmittance spectrum, zeta potential and transmittance electron microscopy (TEM) images reveal that the modified CGR has a high degree of dispersion. More importantly, the pristine GR is insoluble, while the modified CGR-3, mixed with 1.1 wt% CMC modifier, is easily well dispersed in water and has good flowability, and no sedimentation is observed after more than 3 months.
