Processing of expanded graphite reinforced polymer nanocomposites

Asma Yasmin; Jyi Jiin Luo; Isaac M. Daniel

doi:10.1016/j.compscitech.2005.10.014

Processing of expanded graphite reinforced polymer nanocomposites

Asma Yasmin, Jyi Jiin Luo, Isaac M. Daniel^*

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

432 Scopus citations

Abstract

Nanocomposites consisting of anhydride cured epoxy resin matrix reinforced with expanded graphite (EG) with concentrations of 1-2 wt.% were fabricated. Processing techniques such as direct, sonication, shear, and combined sonication and shear mixing techniques were employed in the fabrication of nanocomposites. It was found that both sonication and shear mixing produced in situ nanosize graphite sheets from EG. However, the occurrence of X-ray diffraction (XRD) peaks at 2θ = 26.38° (d_{0 0 2} = 3.37 Å) irrespective of processing technique confirmed the presence of graphite nanosheets in multilayer rather than a single layer form. The mechanical behavior of the nanocomposites was investigated as a function of particle concentration and processing technique. It was found that EG reinforced nanocomposites showed higher elastic modulus than neat epoxy. However, nanocomposites prepared with the aid of shear mixing provided the best exfoliation and dispersion of graphite nanosheets and as a consequence, the best modulus enhancement over other processing techniques.

Original language	English (US)
Pages (from-to)	1182-1189
Number of pages	8
Journal	Composites Science and Technology
Volume	66
Issue number	9
DOIs	https://doi.org/10.1016/j.compscitech.2005.10.014
State	Published - Jul 2006

Keywords

A. Nanostructures
B. Mechanical properties
B. Microstructure
D. Scanning electron microscopy (SEM)
E. Processing

ASJC Scopus subject areas

Ceramics and Composites
Engineering(all)

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10.1016/j.compscitech.2005.10.014

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title = "Processing of expanded graphite reinforced polymer nanocomposites",

abstract = "Nanocomposites consisting of anhydride cured epoxy resin matrix reinforced with expanded graphite (EG) with concentrations of 1-2 wt.% were fabricated. Processing techniques such as direct, sonication, shear, and combined sonication and shear mixing techniques were employed in the fabrication of nanocomposites. It was found that both sonication and shear mixing produced in situ nanosize graphite sheets from EG. However, the occurrence of X-ray diffraction (XRD) peaks at 2θ = 26.38° (d0 0 2 = 3.37 {\AA}) irrespective of processing technique confirmed the presence of graphite nanosheets in multilayer rather than a single layer form. The mechanical behavior of the nanocomposites was investigated as a function of particle concentration and processing technique. It was found that EG reinforced nanocomposites showed higher elastic modulus than neat epoxy. However, nanocomposites prepared with the aid of shear mixing provided the best exfoliation and dispersion of graphite nanosheets and as a consequence, the best modulus enhancement over other processing techniques.",

keywords = "A. Nanostructures, B. Mechanical properties, B. Microstructure, D. Scanning electron microscopy (SEM), E. Processing",

author = "Asma Yasmin and Luo, {Jyi Jiin} and Daniel, {Isaac M.}",

note = "Funding Information: We gratefully acknowledge the grant support from the NASA University Research, Engineering and Technology Institute on Bio Inspired Materials (BIMat) under award no. NCC-1-02037. We are also thankful to Michael H. Gilbert of GrafTech International Ltd., for the generous supply of expandable graphite flakes. ",

year = "2006",

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doi = "10.1016/j.compscitech.2005.10.014",

language = "English (US)",

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AU - Yasmin, Asma

AU - Luo, Jyi Jiin

AU - Daniel, Isaac M.

N1 - Funding Information: We gratefully acknowledge the grant support from the NASA University Research, Engineering and Technology Institute on Bio Inspired Materials (BIMat) under award no. NCC-1-02037. We are also thankful to Michael H. Gilbert of GrafTech International Ltd., for the generous supply of expandable graphite flakes.

PY - 2006/7

Y1 - 2006/7

N2 - Nanocomposites consisting of anhydride cured epoxy resin matrix reinforced with expanded graphite (EG) with concentrations of 1-2 wt.% were fabricated. Processing techniques such as direct, sonication, shear, and combined sonication and shear mixing techniques were employed in the fabrication of nanocomposites. It was found that both sonication and shear mixing produced in situ nanosize graphite sheets from EG. However, the occurrence of X-ray diffraction (XRD) peaks at 2θ = 26.38° (d0 0 2 = 3.37 Å) irrespective of processing technique confirmed the presence of graphite nanosheets in multilayer rather than a single layer form. The mechanical behavior of the nanocomposites was investigated as a function of particle concentration and processing technique. It was found that EG reinforced nanocomposites showed higher elastic modulus than neat epoxy. However, nanocomposites prepared with the aid of shear mixing provided the best exfoliation and dispersion of graphite nanosheets and as a consequence, the best modulus enhancement over other processing techniques.

AB - Nanocomposites consisting of anhydride cured epoxy resin matrix reinforced with expanded graphite (EG) with concentrations of 1-2 wt.% were fabricated. Processing techniques such as direct, sonication, shear, and combined sonication and shear mixing techniques were employed in the fabrication of nanocomposites. It was found that both sonication and shear mixing produced in situ nanosize graphite sheets from EG. However, the occurrence of X-ray diffraction (XRD) peaks at 2θ = 26.38° (d0 0 2 = 3.37 Å) irrespective of processing technique confirmed the presence of graphite nanosheets in multilayer rather than a single layer form. The mechanical behavior of the nanocomposites was investigated as a function of particle concentration and processing technique. It was found that EG reinforced nanocomposites showed higher elastic modulus than neat epoxy. However, nanocomposites prepared with the aid of shear mixing provided the best exfoliation and dispersion of graphite nanosheets and as a consequence, the best modulus enhancement over other processing techniques.

KW - A. Nanostructures

KW - B. Mechanical properties

KW - B. Microstructure

KW - D. Scanning electron microscopy (SEM)

KW - E. Processing

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Processing of expanded graphite reinforced polymer nanocomposites

Abstract

Keywords

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