Optical characterization of PANI/functionalized-MWCNTs/PVA nanocomposites induced by gamma irradiation

Production of Polyvinyl Alcohol–Alginate–Nanocellulose Fibers

“…As the figure shows, all the samples exhibited an absorption peak at 3250 and 2904 cm −1 , which related to the stretching vibration of –OH groups and that of –CH groups, respectively. [ 33–40 ]…”

“…[ 36 ] The absorption peak at 1086 cm −1 was attributed to the –CO stretching and –OH bending of the amorphous regions of the PVA, [ 35 ] whereas that at 914 cm −1 indicated –CH rocking vibration and the syndiotactic structure of PVA. [ 37 ] In addition, C–C stretching vibration was identified at 830 cm −1 . [ 38 ]…”

“…As the figure shows, all the samples exhibited an absorption peak at 3250 and 2904 cm −1 , which related to the stretching vibration of -OH groups and that of -CH groups, respectively. [33][34][35][36][37][38][39][40] In the NC spectrum, peaks were also observed at 1644 and 1426 cm −1 , which indicated -OH adsorbed water vibration and hydrogen intermolecular interaction of the aromatic ring, respectively. [34] Meanwhile, the absorption peaks at 1368 and 1314 cm −1 were related to -CH bending vibration, [33,34] whereas absorption peaks related to the deformation of the -CH, COH, CCO, and CCH pyranose ring skeletal groups were observed at 1160 and 1108 cm −1 .…”

“…[36] The absorption peak at 1086 cm −1 was attributed to the -CO stretching and -OH bending of the amorphous regions of the PVA, [35] whereas that at 914 cm −1 indicated -CH rocking vibration and the syndiotactic structure of PVA. [37] In addition, C-C stretching vibration was identified at 830 cm −1 . [38] In the neat SA spectrum, antisymmetric -COO − and symmetric -COO − were identified at 159 and 1406 cm −1 , respectively, [39] whereas a peak related to -CO stretching was observed at 1298 cm −1 [40] and peaks related to -CO groups were observed at 1082 and 1026 cm −1 .…”