Journal
APPLIED SURFACE SCIENCE
Volume 252, Issue 5, Pages 1404-1409Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2005.02.138
Keywords
poly(vinyl alcohol) (PVA); multiwall carbon nanotube (MWNT); composite films
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Tensile tests were carried out on free-standing composite films of poly(vinyl alcohol) (PVA) and multiwall carbon nanotubes (MWNTs) for different loading levels. Results show that overall mechanical properties of the composite were greatly improved as compared to the neat PVA film. For PVA-based materials at significant high loading level such as 9.1 wt.% MWNTs, considerable increases in Young's modulus, tensile strength and toughness by factors of 4.5, 2.7 and 4.1, respectively, were achieved. Raman, SEM, TEM, and DSC techniques were used to evaluate the PVA/MWNTs composite system. Strong acid-modification of the pristine MWNTs and the subsequent ultrasonication processing allowed good distribution of the nanotubes in the matrix. SEM together with DSC result shows apparent good wetting of the nanotubes by the PVA matrix, which are supportive of good interfacial bonding between the modified carbon nanotubes and the hosting polymer matrix. (c) 2005 Elsevier B.V. All rights reserved.
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