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Effects of MWNT nanofillers on structures and properties of PVA electrospun nanofibres

Naebe, Minoo, Lin, Tong, Tian, Wendy, Dai, Liming and Wang, Xungai 2007, Effects of MWNT nanofillers on structures and properties of PVA electrospun nanofibres, Nanotechnology, vol. 18, no. 22, pp. 1-8.

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Title Effects of MWNT nanofillers on structures and properties of PVA electrospun nanofibres
Author(s) Naebe, Minoo
Lin, Tong
Tian, Wendy
Dai, Liming
Wang, Xungai
Journal name Nanotechnology
Volume number 18
Issue number 22
Start page 1
End page 8
Publisher IOP Publishing Ltd
Place of publication Bristol, England
Publication date 2007-06-06
ISSN 0957-4484
1361-6528
Keyword(s) electrospun nanofibers
carbon nanotubes
crystallinity
crosslink
nucleation crystallization
tensile properties
surface hydrophility
thermal stability
Summary In this study, we have electrospun poly(vinyl alcohol)(PVA) nanofibres and PVA composite nanofibres containing multi-wall carbon nanotubes (MWNTs) (4.5 wt%), and examined the effect of the carbon nanotubes and the PVA morphology change induced by post-spinning treatments on the tensile properties, surface hydrophilicity and thermal stability of the nanofibres. Through differential scanning calorimetry (DSC) and wide-angle x-ray diffraction (WAXD) characterizations, we have observed that the presence of the carbon nanotubes nucleated crystallization of PVA in the MWNTs/PVA composite nanofibres, and hence considerably improved the fibre tensile strength. Also, the presence of carbon nanotubes in PVA reduced the fibre diameter and the surface hydrophilicity of the nanofibre mat. The MWNTs/PVA composite nanofibres and the neat PVA nanofibres responded differently to post-spinning treatments, such as soaking in methanol and crosslinking with glutaric dialdehyde, with the purpose of increasing PVA crystallinity and establishing a crosslinked PVA network, respectively. The presence of carbon nanotubes reduced the PVA crystallization rate during the methanol treatment, but prevented the decrease of crystallinity induced by the crosslinking reaction. In comparison with the crosslinking reaction, the methanol treatment resulted in better improvement in the fibre tensile strength and less reduction in the tensile strain. In addition, the presence of carbon nanotubes reduced the onset decomposition temperature of the composite nanofibres, but stabilized the thermal degradation for the post-spinning treated nanofibres. The MWNTs/PVA composite nanofibres treated by both methanol and crosslinking reaction gave the largest improvement in the fibre tensile strength, water contact angle and thermal stability.
Notes Reproduced with the specific permission of the copyright owner.
Language eng
Field of Research 100799 Nanotechnology not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2007, IOP Publishing Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30007122

Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.