article · Journal of Molecular Liquids
This research investigates the development and physical properties of flexible blended polymers combining poly(methyl methacrylate), polyvinyl acetate, tetrabutylammonium iodide, and milled polyaniline. Laboratory characterisation revealed that incorporating milled polyaniline alters the structural, optical, and dielectric properties of the host matrix. Materials prepared with a 0.55 weight percent concentration of polyaniline showed the highest optical absorbance, the lowest light transmittance, the highest refractive index, and reduced optical band gaps. In terms of dielectric performance, adding milled polyaniline improved the optical dielectric constant, and electrical dielectric constants grew consistently with rising temperatures. Additionally, the polymer blend with 0.33 weight percent milled polyaniline achieved the highest measured energy density. Most samples exhibited non-ohmic electrical behaviour, and both ionic conductivity and activation energy varied depending on filler concentration and temperature.
Modern electronics require flexible materials that combine controllable electrical conductivity, energy storage capability, and optical responsiveness. By adjusting the concentration of polyaniline within a multi-polymer blend, these materials can be tailored for enhanced energy density or adjusted light absorption. This provides basic insights into creating multifunctional polymers capable of performing under varying thermal conditions.
The materials are intended for optoelectronic devices and energy storage applications, which could eventually interest manufacturers of flexible electronics, displays, or capacitors. Based on the material synthesis and laboratory property measurements reported in the abstract, this work is at an early research stage, with substantial device testing and performance validation needed before commercial relevance can be established.
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• The optical dielectric constant values of the doped blends were improved. • As the temperature rises, the electrical dielectric constants of all the blends consistently rise. • The energy density ( U ) of the PMMA/PVAc/TBAI polymer blend increased after doping it with milled PANI . • All blends have a non-ohmic nature, with the exception of those doped at 303 K with x = 0.11, 0.22 and 0.55. • By introducing milled PANI into the host blend, the E a values either rise or decrease, depending on the quantity of PANI added. The present study seeks to explore the creation of novel blended polymers composed of poly (methyl methacrylate, PMMA), polyvinyl acetate (PVAc), tetrabutylammonium iodide (TBAI) and polyaniline (PANI) as possible materials for optical and energy storage applications. X-ray diffraction and scanning electron microscopy techniques were used to investigate the effect of the milled PANI amount on the structure and morphology of the host blend. The doped blend, PMMA/PVAc/TBAI/x wt% milled PANi blended polymers, with x = 0.55 wt% milled PANI exhibited the maximum absorbance throughout the whole range of wavelength. The transmittance attained its lowest value of 0–23 % when the blend was filled with 0.55 wt% milled PANI. The minimum direct and indirect values for optical band gaps are (4.38, 2.93) and 3.61 eV, respectively in the doped blend with x = 0.55 wt% milled PANI. The blend with x = 0.55 wt% milled PANI yielded the greatest refractive inde x values ( n = 1.55@ 600 nm). An irregular improvement in optical conductivity was obtained as the host blend doped with milling PANI. The blend with a doping level of x = 0.33 wt% milled PANI demonstrated the greatest energy density ( U = 6.66 × 10 −3 J/m at 1 kHz and 293 K) value. In addition, the temperature increase enhances the values of U for all blends. All blends adhered to the correlated barrier hopping model. The relaxation time is affected by the doping milled PANI amount. The ionic conductivity and activation energy are affected by the amount of milled PANI and temperature. The I - V characteristics of all blends at different temperatures were studied.
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DOI: 10.1016/j.molliq.2024.126131
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