Nanoscale structure and local mechanical properties of fiber-reinforced composites containing MWCNT-grafted hybrid glass fibers

Autor:	Gregory S. Ho, Charles D. Wood, Richard R. Barto, Karl W. Putz, Marc J. Palmeri, L. Catherine Brinson
Rok vydání:	2012
Předmět:	Materials science Glass fiber General Engineering Chemical vapor deposition Fiber-reinforced composite Carbon nanotube Epoxy Nanoindentation law.invention Transmission electron microscopy law visual_art Volume fraction Ceramics and Composites visual_art.visual_art_medium Composite material
Zdroj:	Composites Science and Technology. 72:1705-1710
ISSN:	0266-3538
DOI:	10.1016/j.compscitech.2012.06.008
Popis:	Carbon nanotubes (CNTs) were grown from the surface of glass fibers by chemical vapor deposition, and these hybrid fibers were individually dispersed in an epoxy matrix to investigate the local composite structure and properties near the fiber surface. High-resolution transmission electron microscopy revealed the influence of infiltration and curing of a liquid epoxy precursor on the morphology of the CNT “forest” region, or region of high CNT density near the fiber surface. Subsequent image analysis highlighted the importance of spatially dependent volume fractions of CNTs in the matrix as a function of distance from the fiber surface, and nanoindentation was used to probe local mechanical properties in the CNT forest region, showing strong correlations between local stiffness and volume fraction. This work represents the first in situ measurements of local mechanical properties of the nano-structured matrix region in hybrid fiber-reinforced composites, providing a means of quantifying the reinforcement provided by the grafted nanofillers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::95579a2d13d620654eb915943fa03634 https://doi.org/10.1016/j.compscitech.2012.06.008 Zobrazit plný text záznamu Full Text from ScienceDirect