Characterization of epoxy functionalized graphite nanoparticles and the physical properties of epoxy matrix nanocomposites

Autor:	Sandi G. Miller, Paula J. Heimann, Ronald E. Allred, Michael Maryanski, Jonathan L. Bauer, Jeremy P. Barlow, Jan-Michael Gosau
Rok vydání:	2010
Předmět:	Toughness Nanocomposite Materials science Graphene General Engineering Nanoparticle Young's modulus Epoxy law.invention symbols.namesake law visual_art Ceramics and Composites symbols visual_art.visual_art_medium Surface modification Graphite Composite material
Zdroj:	Composites Science and Technology. 70:1120-1125
ISSN:	0266-3538
DOI:	10.1016/j.compscitech.2010.02.023
Popis:	This work presents a novel approach to the functionalization of graphite nanoparticles. The technique provides a mechanism for covalent bonding between the filler and matrix, with minimal disruption to the sp2 hybridization of the pristine graphene sheet. Functionalization proceeded by covalently bonding an epoxy monomer to the surface of expanded graphite, via a coupling agent, such that the epoxy concentration was measured as approximately 4 wt.%. The impact of dispersing this material into an epoxy resin was evaluated with respect to the mechanical properties and electrical conductivity of the graphite-epoxy nanocomposite. At a loading as low as 0.5 wt.%, the electrical conductivity was increased by five orders of magnitude relative to the base resin. The material yield strength was increased by 30% and Young s modulus by 50%. These results were realized without compromise to the resin toughness.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d6f0d28b787074aa08114d8fb4ae931c https://doi.org/10.1016/j.compscitech.2010.02.023 Zobrazit plný text záznamu Full Text from ScienceDirect