Synthesis of reduced graphene oxide/aluminum nanocomposites via chemical-mechanical processes

Daeyoung Kim, Heon Kang, Donghyun Bae, Seungjin Nam, Manuel Quevedo-Lopez, Hyunjoo Choi

Research output: Contribution to journalArticle

Abstract

The present study employed a combination of solution-based synthesis and mechanical milling to develop reduced graphene oxide/aluminum composites, in order to achieve uniform dispersion of reduced graphene oxide and strong interfaces between reduced graphene oxide and aluminum. First, spherical aluminum powder was flattened via mechanical milling to afford a large specific surface area and many reaction sites for the graphene oxide. A hydrophilic surface was then created by coating the aluminum powder with polyvinyl alcohol. The polyvinyl alcohol-coated aluminum slurry was mixed with a graphene oxide suspension, thereby inducing a reaction between graphene oxide and polyvinyl alcohol via hydrogen bonding. After thermal reduction, the composite powder was further ball milled and hot-pressed at 500℃ to produce a reduced graphene oxide/aluminum composite. The dispersion of reduced graphene oxide in the composite, as well as the mechanical and thermal behaviors of the composite, improved with increased flattening and specific surface area of the starting aluminum powder.

Original languageEnglish
Pages (from-to)3015-3025
Number of pages11
JournalJournal of Composite Materials
Volume52
Issue number22
DOIs
Publication statusPublished - 2018 Sep 1

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Graphite
Aluminum Oxide
Graphene
Nanocomposites
Aluminum
Oxides
Polyvinyl Alcohol
Powders
Polyvinyl alcohols
Composite materials
Specific surface area
Suspensions
Hydrogen bonds
Coatings

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Chemistry

Cite this

Kim, Daeyoung ; Kang, Heon ; Bae, Donghyun ; Nam, Seungjin ; Quevedo-Lopez, Manuel ; Choi, Hyunjoo. / Synthesis of reduced graphene oxide/aluminum nanocomposites via chemical-mechanical processes. In: Journal of Composite Materials. 2018 ; Vol. 52, No. 22. pp. 3015-3025.
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Synthesis of reduced graphene oxide/aluminum nanocomposites via chemical-mechanical processes. / Kim, Daeyoung; Kang, Heon; Bae, Donghyun; Nam, Seungjin; Quevedo-Lopez, Manuel; Choi, Hyunjoo.

In: Journal of Composite Materials, Vol. 52, No. 22, 01.09.2018, p. 3015-3025.

Research output: Contribution to journalArticle

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AU - Kim, Daeyoung

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AU - Quevedo-Lopez, Manuel

AU - Choi, Hyunjoo

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AB - The present study employed a combination of solution-based synthesis and mechanical milling to develop reduced graphene oxide/aluminum composites, in order to achieve uniform dispersion of reduced graphene oxide and strong interfaces between reduced graphene oxide and aluminum. First, spherical aluminum powder was flattened via mechanical milling to afford a large specific surface area and many reaction sites for the graphene oxide. A hydrophilic surface was then created by coating the aluminum powder with polyvinyl alcohol. The polyvinyl alcohol-coated aluminum slurry was mixed with a graphene oxide suspension, thereby inducing a reaction between graphene oxide and polyvinyl alcohol via hydrogen bonding. After thermal reduction, the composite powder was further ball milled and hot-pressed at 500℃ to produce a reduced graphene oxide/aluminum composite. The dispersion of reduced graphene oxide in the composite, as well as the mechanical and thermal behaviors of the composite, improved with increased flattening and specific surface area of the starting aluminum powder.

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