Journal
COMPOSITES PART B-ENGINEERING
Volume 58, Issue -, Pages 430-437Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2013.10.074
Keywords
Fibres; High-temperature properties; Electron microscopy; Fibre conversion processes
Funding
- NSFC [51233001, 51173024]
- 973 Plan [2014CB643603]
- 863 plan [2012AA03A211]
- Shuguang Plan [09SG30]
- 111 Project [111-2-04]
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Functionalized multiwalled carbon nanotubes (f-MWNTs)/polyamic acid (PAA) solution was prepared via in situ polymerization. Transmission electron microscopy conformed the homogeneous dispersion of f-MWNTs in the polymer matrix. The diffusion rate of N,N-dimethylacetamide in f-MWNT/PAA solution into water shows a significant acceleration upon f-MWNT loadings. PAA composite fibers containing various loadings of f-MWNTs were produced by traditional wet-spinning process, and then the precursor fibers were converted to corresponding polyimide fibers via thermal imidization. Scanning electron microscopy, atomic force microscopy and X-ray scattering were employed to characterize the composite fibers. The thermal stability of polyimide fibers shows an obvious improvement with the incorporation of f-MWNTs. Meanwhile, f-MWNTs hinder the motivation of macromolecular chains, resulting in a reduced heat-shrinkage of the composite fibers. Exceptional enhanced mechanical properties of composite fibers were obtained due to the introduction of f-MWNT nanofillers. (C) 2013 Elsevier Ltd. All rights reserved.
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