Investigation of physical and mechanical properties of polyaniline/MMT nanocomposites

Abstract

Polyaniline (PANI) was synthesized chemically in an acidic medium in the presence of ammonium persulfate (APS) as an oxidizing agent. PANI/montmorillonite nano-composites were prepared in the presence of various amounts of modified clay (from 1 to 5 wt.%) by solution casting method. The free standing film of polyaniline and PANI/clay nano-composites was obtained by vaporization of solvent contain. Products were characterized by FT-IR spectra, SEM image, and XRD pattern. Thermal stability was also studied by TGA analysis, electrical conductivity was measured by four point probe technique and mechanical properties were studied by tensile strength. The PANI/clay nano-composites thermal and mechanical properties were observed to be remarkably improved. For example, polyaniline containing nano-clay has less weight loss compared to pure polyaniline. In addition Young's modulus and strength at break point was increased in the case of polyaniline containing nano-clay The importance of our work is to provide a narrow look on the thermal and physical properties of polyaniline by the incorporation of montmorillonite into its structure as well as investigation of the conductivity of PANI/MMT nanocomposites as a potential conductive polymer to be used in solar cells or have corrosion protection applications.

Three-Dimensional-Printed Polyethylene Glycol Diacrylate-Polyaniline Composites by In Situ Aniline Photopolymerization: An Innovative Biomaterial for Electrocardiogram Monitoring Systems

“…In fact, in both spectra we find signals referable to PEGDA around 2870, 1728, 1636, and 1096 cm –1 which can be correlated with the stretching of the (C–H) bond, the (−CO) carbonyl group, the (CC) bond, and (C–O–C) bond, respectively. − In the PEGDA-PANI spectrum, additional bands referred to the PANI phase are clearly evident. The peaks around 1294 cm –1 can be explained with the C–N stretching modes of aromatic amine − while the signals at 749 and 688 cm –1 can be due to C–H out-of-plain bending vibrations of the benzene ring. − The bands at about 1497 and 1536 cm –1 are ascribed to the stretching vibration of benzenoid and quinoid rings, respectively, − , with the benzenoid signal more intense than the quinonoid one. This result is a further confirmation of the synthesis of PANI in the conductive emeraldine salt state .…”

Mechanical, thermal, and conductivity performances of novel thermoplastic natural rubber/graphene nanoplates/polyaniline composites

“…Therefore, the gaps may be formed in the matrix, which resulting in weak points of the sample. Besides, the downward result can be associated to the poor mechanical property of PANI, which is very inflexible due to its structure defined through the double bonds also aromatic rings …”

“…Chandran and Narayanankutty prepared conductive NR/PANI coated with short nylon‐6 fiber composites via mechanical mixing and the results showed the increasing electrical conductivity and thermal stability with PANI concentration up to 120 phr . As reported by Gholami et al ., the incorporation of clay into PANI matrix exhibited the improvement in thermal stability but deterioration in electrical conductivity of nanocomposites prepared by solvent casting method . Wang and coresearchers had synthesized flexible polystyrene microsphere/reduced graphene arrayed with PANI composite film electrodes which are potential for supercapacitors application .…”

Progress in Conductive Polyaniline-Based Nanocomposites for Biomedical Applications: A Review

“…Moreover, a significant improvement in the physical and mechanical properties, such as Young's modulus and heat resistance, has been seen in the PANI nanocomposites. 29 Polyaniline in blends and nanocomposite forms prepared using polyurethane, natural rubber, chitosan, carbon nanotubes, and montmorillonite operates as a conducting component in a proper matrix to provide the needed mechanical properties. Indeed, the increased toughness and decreased elongation at break can be achieved in blends and/or nanocomposites by enhancing the polyaniline ratio.…”

“…Polyaniline pellet shows a good mechanical strength due to good compactness of the PANI powders. Moreover, a significant improvement in the physical and mechanical properties, such as Young’s modulus and heat resistance, has been seen in the PANI nanocomposites . Polyaniline in blends and nanocomposite forms prepared using polyurethane, natural rubber, chitosan, carbon nanotubes, and montmorillonite operates as a conducting component in a proper matrix to provide the needed mechanical properties.…”