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

被引：52

作者：

Wood, Charles D. ^{[1
]}

Palmeri, Marc J. ^{[2
]}

Putz, Karl W. ^{[1
]}

Ho, Gregory ^{[3
]}

Barto, Rick ^{[3
]}

Brinson, L. Catherine ^{[1
,2
]}

机构：

[1] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA

[2] Northwestern Univ, Mat Sci & Engn Dept, Evanston, IL 60208 USA

[3] Lockheed Martin Adv Technol Labs, Cherry Hill, NJ USA

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2012年 / 72卷 / 14期

基金：

美国国家科学基金会;

关键词：

Hybrid composites; Carbon nanotubes; Mechanical properties; Nanoindentation; ALIGNED CARBON NANOTUBES; EPOXY; FABRICATION; GROWTH; WAVINESS;

D O I：

10.1016/j.compscitech.2012.06.008

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

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. (c) 2012 Elsevier Ltd. All rights reserved.

引用

页码：1705 / 1710

页数：6

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