Electrical, mechanical, and thermal analysis of natural rubber/polyaniline-Dbsa composite

Abstract

A composite of natural rubber (NR) with polyaniline (PANI) was obtained by mixing an aqueous dispersion of dodecylbenzenesulfonic acid (DBSA)-doped PANI with NR latex in different concentrations. Films were obtained by the casting method and characterized by ultraviolet visible near-infrared (UV-Vis-NIR) spectroscopy, thermogravimetry/differential thermogravimetry (TG/ DTG), stress-strain testing, differential scanning calorimetry (DSC), and DC electrical conductivity measurements. The UV-vis-NIR spectrum showed that PANI remained doped in the composite, and this improved the mechanical and electrical proprieties of NR films and afforded them good thermal stability up to ~200°C. The percolation threshold did not follow the universal critical exponent, and in this case, conduction preferentially occurs by hopping and tunneling.

Development of electroactive nanofibers based on thermoplastic polyurethane and poly(o‐ethoxyaniline) for biological applications

“…Figure shows the UV‐VIS spectra of POEA solution doped with DBSA and POEA undoped in THF. The undoped POEA displays two characteristic bands, one at 310 nm and other at 600 nm, related to the π–π* transitions of the benzenoid and quinoid ring, respectively . The absorption band at 600 nm was absent in the spectrum of doped POEA and two additional bands in the region of 450 nm and of 800 nm were observed, both arising from the formation of delocalized polarons due the organic doping with DBSA.…”

“…This doping promoted the protonation of chains, expanding the polymer chains and providing a large increase in the conductivity of the polymer . Researchers have demonstrated that the protonation degree of PANI and its derivatives resulted in the change of crystalline structure of polymer …”

Doping effect of dodecyl benzene sulphonic acid in poly(3-hexylthiophene)-P3HT-films

“…If sufficiently high doping levels in organic semiconductors would be achieved, it can render them conductive for many applications. There are range of dopants existing in the literature from molecular dopants, such as tetrafluoro-tetracyano-quinodimethane (F4-TCNQ) [13], acid dopants, such as dodecylsulphonic acid (DBSA) [14], or species such as iodine or iron chloride. Access to a larger library of materials would permit to adjust other features of the resulting architectures that are highly relevant for their application, such as their ''softness'' which provides for a good compatibility with different shaped surfaces.…”

Tensile properties, morphology, and electrical conductivity of (Poly[vinyl chloride])/(Poly[ethylene oxide])/Polyaniline conductive films

“…In polymeric composites filled with a low proportion of conducting particles, the mean distance between particles or clusters is large, and the conductivity is limited to hop by the presence of the polymeric matrix. Silva et al reported that the electrical properties of NR films were improved by the incorporation of PAni–DBSA. The electrical conductivity of ∼10 −6 S/cm was achieved at 10% PAni–DBSA content, which is 7 orders of magnitude higher than that of neat NR (10 −14 S/cm).…”