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Journal of Nanomaterials
Volume 2012, Article ID 610781, 8 pages
http://dx.doi.org/10.1155/2012/610781
Research Article

Comparative Study of the Comprehensive Properties of Multiwalled Nanotubes/Polyurethane Nanofibrous Membranes with and without Thermal Treatment

1School of Aerospace Engineering & Applied Mechanics, Tongji University, Shanghai 200092, China
2School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha 410004, China

Received 3 December 2011; Revised 5 January 2012; Accepted 19 January 2012

Academic Editor: Tong Lin

Copyright © 2012 Ling Liu and Shengqiang Pan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper makes use of electrospinning technology to produce multiwalled nanotubes and polyurethane (MWNTs/PU) composite nanofibrous membranes. A thermal treatment method was proposed to improve the comprehensive properties of the membranes. The morphology of the prepared nanomaterials was characterized by the SEM and TEM. Comprehensive properties, including thermal stability, conductivity, and mechanical properties, of the membranes with and without thermal treatment were investigated comparatively by TGA, DMA, resistivity measurement, and tensile testing, respectively. The results indicate that the proposed thermal treatment method could effectively improve the conductivity and mechanical properties of the nanomaterials. For the thermal treatment-based membrane filled with 3 wt.% of MWNTs, the conductivity reaches 8 . 2 9 × 1 0 5  Scm−1, which is nearly three orders higher than that of the untreated sample. Meanwhile, the tensile strength and modulus increase more than 50% after thermal treatment. It is expected that such improved nanomaterials may be potentially useful in composite reinforcement and electronic devices.