TITLE:
Spectroscopic Studies of Nanocomposites Based on PEO/PVDF Blend Loaded by SWCNTs
AUTHORS:
Hind Mohammed Alhusiki-Alghamdi, Naziha Suliman Alghunaim
KEYWORDS:
SWCNTs, Nanocomposites, UV-Vis Spectroscopy, Raman Shift, TEM
JOURNAL NAME:
Journal of Modern Physics,
Vol.6 No.4,
March
19,
2015
ABSTRACT: Novel
nanocomposites of PEO/PVDF loaded by different contents of SWCNTs were
prepared. From UV-Vis spectra, the estimated values of absorption edge,
absorption coefficient, energy of tail and extinction coefficient were
calculated. The exponential decay tail at low energy is due to the presence of
localized states in the energy band gap. The shift of Raman spectra indicates
the possibility of SWCNTs to be attached with OH group in the side chain of
polymer molecules. The X-ray measurements indicate that the addition of SWCNTs
is a rich amorphous region in polymeric matrices and complete complexation
between PEO/PVDF blend and SWCNTs. The SEM images show smooth surface of
PEO/PVDF and they become rough with single rod with a good distribution within
surface region in polymeric matrices after loading SWCNTs. TEM images showed
that SWCNTs were dispersed well in polymeric matrices. The broken ends of
nanotubes were showing that the SWCNTs were broken apart rather than from at
the fracture surface. The films show some defects like rags on the tube walls.
There are some black regions in TEM images attributed to amorphous nature
carbon. The prepared nanocomposites are very useful in technical application.