Preparation and Characterization of PANI/PVA Blends as Electrolyte Materials

Abstract

This work presents a detailed study on the preparation and performance of polyaniline (PANI)/Polyvinyl alcohol (PVA) blend. The blends are prepared by the casting method at different weight ratios (1, 2, 3, 4, and 5 wt%). The structural morphology was characterized using scanning electron microscope SEM. The morphological analysis showed a uniform blend of PANI with PVA matrix. PVA exhibits lamellae structure of different shapes and dimensions. For 1% PANI, the results showed homogeneous blending, which decreases with an increase of the PANI ratio. Phase separation and semispherical region formation in the PVA matrix were seen. It was found that incompatibilities increase with increasing the PANI ratio. Also, the results proved in the blends scanning electron microscope anilinium cationradical surfaces for an aggregate of different dimension and spherical shapes, which induced by surface tension. The electrical conductivity study of PANI/PVA blends and PVA reveals that PANI/PVA gives the conductivity of 10 −4 (cm.Ω) -1 , while PVA presented the lowest conductivity with the value of 10 −12 (cm.Ω) -1 . The results also showed an increase in ionic conductivity with temperature and PANI weight ratio. The increase in electrical conduction with increasing temperatures is due to the negative thermal coefficient, this result is attributed to the polymer chains that act as traps for charge carriers, and when the temperature rises, the transfer mechanism will be reigned by the hopping process.

FTIR and electrical behavior of blend electrolytes based on (PVA/PVP)

“…This study relied extensively on changing the FTIR spectral band assigned to explain polymer blends and their interactions with varying KI wt.% concentrations. The hydroxyl groups of the (PVA-PVP) blend shifted slightly (3425.34 -3452.34 cm -1 ) with the increase of the KI wt% concentrations, as seen in Table 2 [12,13]. There were no significant shifts in the absorbance of the C=C bond at 1575 cm -1 .…”

“…The C-H stretching bond shifted from 2977.89 cm -1 to a lower wavenumber of 2972.10 cm -1 , indicating that hydrogen bonding interactions have developed. The CH 2 peak for the (PVA-PVP) has not disappeared entirely for (A3, A4, and A5) samples, indicating that some of the vinyl groups have been left unreacted during the polymerization process [13][14][15][16][17].…”

“…PVA and PVP are eco-friendly, hydrophilic, biodegradable, nontoxic, and biocompatible polymers. These polymers are water-soluble, possess good mechanical strength, form flexible, and are transparent when prepared by solution-cast technique [12,13]. This work aims to prepare electrolyte-based polymers and salt.…”

FTIR and electrical behavior of blend electrolytes based on (PVA/PVP)

“…The C-H stretching bond shifted from 2977.89 cm -1 to a lower wavenumber of 2972.10 cm -1 , indicating that hydrogen bonding interactions have developed. The CH 2 peak for the (PVA-PVP) has not disappeared entirely for (A3, A4, and A5) samples, indicating that some of the vinyl groups have been left unreacted during the polymerization process [13][14][15][16][17].…”

Synthesis and Study Medical Application of Nanocomposites Based on grafted Chitosan /Polyvinyl alcohol

“…Poly (vinyl alcohol) (PVA) can be defined as one of the synthetic polymers, which are mainly composed of C-C bonds [9,10]. It's non-toxic, water-soluble, biocompatible, and biodegradable, which makes it widely applicable in the biomedical field [11]. In the case of the PVA and the chitosan, their sufficient miscibility results from bonds of hydrogen that are formed between their functional groups [12,13].…”