Post by williamplayer on Jan 23, 2014 11:50:45 GMT
The University of Texas at Austin
Graphene-based Polymer Nanocomposites
Graphene-based materials are single- or few-layer platelets that can be produced in bulk quantities by chemical methods. Herein, we present a survey of the literature on polymer nanocomposites with graphene-based fillers including recent work using graphite nanoplatelet fillers. A variety of routes used to produce graphene-based materials are reviewed, along with methods for dispersing these materials in various polymer matrices. We also review the rheological, electrical, mechanical, thermal, and barrier properties of these composites, and how each of these composite properties is dependent upon the intrinsic properties of graphene-based materials and their state of dispersion in the matrix. An overview of potential applications for these composites and current challenges in the field are provided for perspective and to potentially guide future progress on the development of these promising materials.
Graphene, a monolayer of sp2-hybridized carbon atoms arranged in a two-dimensional lattice, has attracted tremendous attention in recent years owing to its exceptional thermal, mechanical, and electrical properties. One of the most promising applications of this material is in polymer nano- composites, polymer matrix composites which incorporate nano-scale filler materials. Nanocomposites with exfoliated layered silicate fillers have been investigated as early as 1950, but significant academic and industrial interest in nanocomposites came nearly forty years later following a report from researchers at Toyota Motor Corporation that demonstrated large mechanical property enhancement using montmorillonite as filler in a Nylon-6 matrix. Polymer nanocomposites show substantial property enhancements at much lower loadings than polymer composites with conventional micron-scale fillers (such as glass or carbon fibers), which ultimately results in lower component weight and can simplify processing; moreover, the multifunctional property enhancements made possible with nanocomposites may create
new applications of polymer.
On account of the recent emergence of using graphite oxide (GO) to prepare graphene-based materials for composites and other applications, this review will focus primarily on polymer nanocomposites utilizing GO-derived materials as fillers. Emphasis will be directed toward structure e property relationships as well as trends in property enhancements of these composites, and comparisons to other nano fillers will be made where appropriate. Some highlights from the literature on polymer composites with what have been referred to as graphite nanoplatelet (GNP) fillers, typically derived from graphite intercalation compounds (GICs), will also be presented and used to provide additional context. Although a review on GO-derived polymer nanocomposites has recently appeared, our review considers work with GNP fillers, and provides a historical perspective with more emphasis on preparative methods and processing.
Download Article: www.sciencedirect.com/science/article/pii/S0032386110010372
Graphene-based Polymer Nanocomposites
Graphene-based materials are single- or few-layer platelets that can be produced in bulk quantities by chemical methods. Herein, we present a survey of the literature on polymer nanocomposites with graphene-based fillers including recent work using graphite nanoplatelet fillers. A variety of routes used to produce graphene-based materials are reviewed, along with methods for dispersing these materials in various polymer matrices. We also review the rheological, electrical, mechanical, thermal, and barrier properties of these composites, and how each of these composite properties is dependent upon the intrinsic properties of graphene-based materials and their state of dispersion in the matrix. An overview of potential applications for these composites and current challenges in the field are provided for perspective and to potentially guide future progress on the development of these promising materials.
Graphene, a monolayer of sp2-hybridized carbon atoms arranged in a two-dimensional lattice, has attracted tremendous attention in recent years owing to its exceptional thermal, mechanical, and electrical properties. One of the most promising applications of this material is in polymer nano- composites, polymer matrix composites which incorporate nano-scale filler materials. Nanocomposites with exfoliated layered silicate fillers have been investigated as early as 1950, but significant academic and industrial interest in nanocomposites came nearly forty years later following a report from researchers at Toyota Motor Corporation that demonstrated large mechanical property enhancement using montmorillonite as filler in a Nylon-6 matrix. Polymer nanocomposites show substantial property enhancements at much lower loadings than polymer composites with conventional micron-scale fillers (such as glass or carbon fibers), which ultimately results in lower component weight and can simplify processing; moreover, the multifunctional property enhancements made possible with nanocomposites may create
new applications of polymer.
On account of the recent emergence of using graphite oxide (GO) to prepare graphene-based materials for composites and other applications, this review will focus primarily on polymer nanocomposites utilizing GO-derived materials as fillers. Emphasis will be directed toward structure e property relationships as well as trends in property enhancements of these composites, and comparisons to other nano fillers will be made where appropriate. Some highlights from the literature on polymer composites with what have been referred to as graphite nanoplatelet (GNP) fillers, typically derived from graphite intercalation compounds (GICs), will also be presented and used to provide additional context. Although a review on GO-derived polymer nanocomposites has recently appeared, our review considers work with GNP fillers, and provides a historical perspective with more emphasis on preparative methods and processing.
Download Article: www.sciencedirect.com/science/article/pii/S0032386110010372