期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 71, 期 13, 页码 1556-1562出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2011.06.013
关键词
Carbon nanotubes; Nanocomposites; Polymer-matrix composites (PMCs); Mechanical properties; Electrospinning
资金
- National Natural Science Foundation of China [20774019, 50873027]
- Outstanding Doctoral Research Foundation of Key Disciplines in Fudan University
- Shanghai Municipal Education Commission [09SG02]
- Shanghai Education Development Foundation
Highly aligned polyimide (PI) and PI nanocomposite fibers containing carbon nanotubes (CNTs) were produced by electrospinning. Scanning electron microscopy showed the electrospun nanofibers were uniform and almost free of defects. Transmission electron microscopy indicated that the CNTs were finely dispersed and highly oriented along the CNT/PI nanofiber axis at a relatively low concentration. The as-prepared well-aligned electrospun nanofibers were then directly used as homogeneity reinforcement to enhance the tensile strength and toughness of PI films. The neat PI nanofiber reinforced PI films showed good transparency, decreased bulk density and significantly improved mechanical properties. Compared with neat PI film prepared by solution casting, the tensile strength and elongation at break for the PI film reinforced with 2 wt.% CNT/PI nanofibers were remarkably increased by 138% and 104%, respectively. The significant increases in the overall mechanical properties of the nanofibers reinforced polyimide films can be ascribed to good compatibility between the electrospun nanofibers and the matrix as well as high nanofiber orientation in the matrix. Our study demonstrates a good example for fabricating high performance and high toughness polyimide nanocomposites by using this facile homogeneity self-reinforcement method. (C) 2011 Elsevier Ltd. All rights reserved.
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