In-situ preparation and characterization of pyrrole and tert-butyl 1-pyrrole-carboxylate on barium titanate/poly(acrylonitrile-co-methylacrylate) nanoparticles

Polypyrrole/barium titanate/poly(acrylonitrile-co-methylacrylate)–deposited cotton fabrics: Electromagnetic shielding

“…The FTIR-ATR spectrum of cotton fabrics coated with polypyrrole (Figure 5) exhibited typical polypyrrole peaks, as described in the literature [12,24,25,34,39]. The FTIR spectra of untreated cotton fabrics (Figure 5a) indicated the presence of a broad band at 3300–3500 cm −1 attributable to OH groups, with this absorption band disappearing from treated cotton fabric spectra.…”

“…Whilst the conductivity of polypyrrole emulsions is of the order of 60 µS [12,21], this value is further increased for cotton coated with such an emulsion. Also, conductivity is dependent upon coating thickness (Figure 2) and PPy molar ratio (Figure 3b).…”

“…An emulsion polymerization method was used to synthesize (BaTiO 3 -[P(AN-co-MA]) nanocomposites by free radical polymerization, by using ammonium persulphate as an oxidant in the aqueous medium. The nanocomposite was synthesized following the procedure reported in our previous study [12].…”

“…This is due to the inherent structure of these polymers. The shielding efficiency of conducting polymers as a function of their conductivity properties, thickness, and temperature has been reviewed in detail [11,12].…”

“…Among various fillers, ferroelectric properties and high dielectric constant make barium titanate (BaTiO 3 ) [16,19,20] useful in an array of applications such as optics, optoelectronics, sensors, electromagnetic shielding applications [21,2], multilayer ceramic capacitors, gate dielectrics, waveguide modulators, IR detectors, and holographic memory. At room temperature, BaTiO 3 adopts a tetragonal perovskite-type structure and among the many crystallographic forms, the tetragonal phase has the best dielectric properties [12,20,21].…”