Approaching the theoretical limit for reinforcing polymers with graphene

We have prepared polymer-graphene composites from sonication-exfoliated graphene. Using centrifugation-based size selection, we prepared composites using flakes of two different aspect ratios, ∼1000 and ∼2000. We find very little reinforcement using the smaller flakes. However, the larger flakes result in a doubling in modulus and strength for <0.4 vol% graphene. We show these results to be in line with theory which predicts a sharp increase in reinforcement efficiency as the aspect ratio is increased from 1000 to 2000. The observed reinforcement exactly matches that expected for the measured flake size and is within 30% of the ultimate limit.

[1]  S. Stankovich,et al.  Graphene-based composite materials , 2006, Nature.

[2]  A. Bourlinos,et al.  Aqueous-phase exfoliation of graphite in the presence of polyvinylpyrrolidone for the production of water-soluble graphenes , 2009 .

[3]  Jonathan L. Bauer,et al.  Characterization of Epoxy Functionalized Graphite Nanoparticles and the Physical Properties of Epoxy Matrix Nanocomposites , 2010 .

[4]  Klaus Kern,et al.  Elastic properties of chemically derived single graphene sheets. , 2008, Nano letters.

[5]  J. Coleman,et al.  Strong dependence of mechanical properties on fiber diameter for polymer-nanotube composite fibers: differentiating defect from orientation effects. , 2010, ACS nano.

[6]  Gary G. Tibbetts,et al.  A review of the fabrication and properties of vapor-grown carbon nanofiber/polymer composites , 2007 .

[7]  J. Coleman,et al.  Liquid phase production of graphene by exfoliation of graphite in surfactant/water solutions , 2008, 0809.2690.

[8]  Xiaoming Yang,et al.  Synthesis and characterization of layer-aligned poly(vinyl alcohol)/graphene nanocomposites , 2010 .

[9]  Xufeng Zhou,et al.  A scalable, solution-phase processing route to graphene oxide and graphene ultralarge sheets. , 2010, Chemical communications.

[10]  Yan Wang,et al.  Molecular‐Level Dispersion of Graphene into Poly(vinyl alcohol) and Effective Reinforcement of their Nanocomposites , 2009 .

[11]  Lei Gong,et al.  Interfacial Stress Transfer in a Graphene Monolayer Nanocomposite , 2010, Advanced materials.

[12]  J. Kysar,et al.  Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene , 2008, Science.

[13]  J. Rosenthal.  A model for determining fiber reinforcement efficiencies and fiber orientation in polymer composites , 1992 .

[14]  J. Coleman,et al.  High-concentration solvent exfoliation of graphene. , 2010, Small.

[15]  J. Coleman,et al.  Reinforcement of polymers with carbon nanotubes. The role of an ordered polymer interfacial region. Experiment and modeling , 2006 .

[16]  Guohua Chen,et al.  Electrochemically modified graphite nanosheets and their nanocomposite films with poly(vinyl alcohol) , 2010 .

[17]  On the strength and stiffness of planar reinforced plastic resins , 1970 .

[18]  Werner J. Blau,et al.  Reinforcement of polymers with carbon nanotubes: The role of nanotube surface area , 2004 .

[19]  SUPARNA DUTTASINHA,et al.  Graphene: Status and Prospects , 2009, Science.

[20]  J. Coleman,et al.  High-yield production of graphene by liquid-phase exfoliation of graphite. , 2008, Nature nanotechnology.

[21]  J. Coleman,et al.  The Effect of Nanotube Content and Orientation on the Mechanical Properties of Polymer–Nanotube Composite Fibers: Separating Intrinsic Reinforcement from Orientational Effects , 2011 .

[22]  S. Bose,et al.  Recent advances in graphene based polymer composites , 2010 .

[23]  Yi-Tao Liu,et al.  High-concentration organic solutions of poly(styrene-co-butadiene-co-styrene)-modified graphene sheets exfoliated from graphite , 2011 .

[24]  Werner J. Blau,et al.  High Performance Nanotube‐Reinforced Plastics: Understanding the Mechanism of Strength Increase , 2004 .

[25]  M. Shaffer,et al.  Fabrication and Characterization of Carbon Nanotube/Poly(vinyl alcohol) Composites , 1999 .

[26]  Il-hwan Kim,et al.  Polylactide/Exfoliated Graphite Nanocomposites with Enhanced Thermal Stability, Mechanical Modulus, and Electrical Conductivity , 2010 .

[27]  Jili Wu,et al.  Preparation and characterization of graphene/poly(vinyl alcohol) nanocomposites , 2010 .

[28]  J. Coleman,et al.  Small but strong: A review of the mechanical properties of carbon nanotube–polymer composites , 2006 .

[29]  R. Mülhaupt,et al.  Functionalized Graphenes and Thermoplastic Nanocomposites Based upon Expanded Graphite Oxide. , 2009, Macromolecular rapid communications.

[30]  Karl I. Jacob,et al.  Experimental trends in polymer nanocomposites—a review , 2005 .

[31]  L. Brinson,et al.  Functionalized graphene sheets for polymer nanocomposites. , 2008, Nature nanotechnology.

[32]  Jonathan N. Coleman,et al.  Size selection of dispersed, exfoliated graphene flakes by controlled centrifugation , 2012 .

[33]  Mustafa Lotya,et al.  Measurement of multicomponent solubility parameters for graphene facilitates solvent discovery. , 2010, Langmuir : the ACS journal of surfaces and colloids.

[34]  Dajun Chen,et al.  Enhanced Mechanical Properties of Graphene-Based Poly(vinyl alcohol) Composites , 2010 .

[35]  L. Brinson,et al.  High‐Nanofiller‐Content Graphene Oxide–Polymer Nanocomposites via Vacuum‐Assisted Self‐Assembly , 2010 .

[36]  Jonathan N. Coleman,et al.  Graphene Dispersion and Exfoliation in Low Boiling Point Solvents , 2011 .

[37]  Robert J. Young,et al.  Micromechanics of fibre fragmentation in model epoxy composites reinforced with α-alumina fibres , 1998 .