Preparation and Microstructure of Two Kinds of Exfoliated Graphite

Ji Jin Zhao; Xiao Xia Li; Yu Xiang Guo; Tong Sun; Sen Ma

doi:10.4028/www.scientific.net/AMR.706-708.211

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 706-708Preparation and Microstructure of Two Kinds of...

Preparation and Microstructure of Two Kinds of Exfoliated Graphite

Abstract:

Two kinds of exfoliated graphite have been prepared from graphite flake and graphite powder, and their preparation conditions were respectively optimized by orthogonal experiments and parallel experiments. The effect of graphite size on the characteristics of exfoliated graphite was researched. The microstructure of two kinds of exfoliated graphite was measured by SEM. The results show that the optimal preparation conditions for exfoliated graphite flake are as following: the mass-volume ratio of graphite to mixed acid is 1: 4, the volume ratio of nitric acid to phosphoric acid is 1: 2, the mass ratio of graphite to potassium permanganate is 1: 0.1, and the reaction temperature is 25°C. For exfoliated graphite powder, the optimal mass ratio of graphite powder to potassium permanganate is 1: 0.22, and the consumption of oxidant for exfoliated graphite powder is more than that for exfoliated graphite flake. The longitudinal expansion of graphite flake is more apparent than that of graphite powder and leads to a worm-like fluffy rope.

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Periodical:

Advanced Materials Research (Volumes 706-708)

Pages:

211-214

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.706-708.211

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Online since:

June 2013

Authors:

Ji Jin Zhao, Xiao Xia Li, Yu Xiang Guo, Tong Sun, Sen Ma

Keywords:

Exfoliated Graphite Flake, Exfoliated Graphite Powder, Microstructure, Preparation

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