l-Phenylalanine amino acid functionalized multi walled carbon nanotube (MWCNT) as a reinforced filler for improving mechanical and morphological properties of poly(vinyl alcohol)/MWCNT composite

•Bio functionalized MWCNT (f-MWCNT) was used for fabrication of PVA/MWCNT composites.•Attached amino acid groups on MWCNT enhance the MWCNT interaction with PVA hydroxyl groups.•The effect of f-MWCNT on mechanical and thermal properties of PVA was examined.•TEM results exhibited well dispersion of f...

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Bibliographic Details
Published in:Progress in organic coatings 2014-11, Vol.77 (11), p.1966-1971
Main Authors: Mallakpour, Shadpour, Abdolmaleki, Amir, Borandeh, Sedigheh
Format: Article
Language:English
Subjects:
Alcohols
Amino acid
Amino acids
Carbon nanotubes
Composite
Dispersions
Infrared spectroscopy
Mechanical properties
Multi wall carbon nanotubes
Multi walled carbon nanotube (MWCNT)
Poly(vinyl alcohol) (PVA)
Polyvinyl alcohols
Surface functionalization
Thermal properties
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Summary:•Bio functionalized MWCNT (f-MWCNT) was used for fabrication of PVA/MWCNT composites.•Attached amino acid groups on MWCNT enhance the MWCNT interaction with PVA hydroxyl groups.•The effect of f-MWCNT on mechanical and thermal properties of PVA was examined.•TEM results exhibited well dispersion of f-MWCNT into the PVA matrix in a helix shape. Carbon nanotube dispersion in polymer matrix is one of the most crucially important aspects in carbon nanotube/polymer composites. This paper is aimed to discuss the considerable improvement in dispersion of multi walled carbon nanotubes (MWNTs) in poly(vinyl alcohol) (PVA) matrix that was attained through bio-functionalization of MWCNTs. Initially, for getting better dispersion in water, pure MWCNTs have been functionalized by l-phenylalanine amino acid. The functionalized MWCNTs (f-MWCNTs) show much enhanced solubility in water. So, effects of modified MWCNT on dispersion in PVA matrix and certain properties of the resulting composites, like; mechanical, thermal and morphological properties were studied. The prepared composites were examined by Fourier transform infrared spectroscopy, X-ray diffraction and transmission electron microscopy. Also, the mechanical and thermal properties of composite films have been investigated and revealed that incorporation of just a few percent of f-MWCNTs can improve the PVA mechanical and thermal properties significantly.
ISSN:0300-9440
1873-331X
DOI:10.1016/j.porgcoat.2014.07.005