Blend of Nylon 6 and Polyaniline Doped with Sulfanilic Acid and its Schottky Diode

Abstract

Polyaniline/nylon 6 blends were prepared from formic acid as a single solvent with various weight ratios of polyaniline (PANI). The optical, structural, morphological, thermal, and electrical properties of these blends were investigated. Blend films with PANI protonated with sulfanilic acid (SA) as a new protonating agent showed higher conductivity and degree of protonation in comparison with unprotonated PANI. The PANI-SA/nylon 6 blend exhibited a percolation threshold at around 1.66 wt.% of PANI, whereas unprotonated PANI/nylon 6 blend appeared at round 10 wt.% of PANI. Schottky diodes based on PANI-SA and nylon 6 blend at different weight percentages of PANI were fabricated and characterized using Al as Schottky contact and Ag as an Ohmic contact.

Preparation and characterisation of silver nanoparticles/graphene oxide hybrid nanofiller reinforced-polyaniline

“…The bands obtained at 1277 and 1241 cm –1 attributed to the C–N stretching vibration of the benzenoid structure and the in-plane bending of the C–H bond of the quinoid structure. The emeraldine salt form of PANI is confirmed by out-of-plane bending vibration of the C–H bond that appears at 793 cm –1 [1, 14].…”

“…For PANI, the absorption peaks appeared at 331 and 625 nm due to π–π* and n–π* transitions. The emeraldine salt form of PANI is confirmed by the observed π–π* transition [13, 14, 34].…”

“…The TGA curve of PANI shows that the weight is lost at peak temperature ( T P1 ) of 74°C assigned to the expulsion of the volatile matters [14]. The weight is lost at a temperature range between 181 and 316°C ( T P2 = 233°C) is ascribed to the removal of dopant ions and some impurities.…”

“…The conductivity of the conjugated polymers can be changed by the doping method in which the charge is transferred from polymer chain to dopant and vice versa, which can be carried out via chemical, electro-chemical, and photo-chemical methods [10]. The conducting polymer PANI contain great potential because of its thermal, environmental, electromagnetic shielding effectiveness, electro-chemical, electro-optical, optical, electronic properties and easy preparation, high yield, low cost is exceptional from other organic conjugated conductive polymers, which is also further contributed by the high conductivity in the doped state [5, 6, 9, 11-14]. The PANI dispersion can be carried out through various processes such as polymerisation of aniline in micelle medium, emulsion medium, and reversed microemulsion medium [15].…”

Preparation of compatible polyaniline/polyethersulfone solution blends

“…No sharp peaks were observed and the pattern clearly indicates a completely amorphous nature. It is a clear indication of physico-chemical interaction in the blends [26,27] and there is no phase separation occurred. This shows that sulfonyl group of PES and amine group in PANi forms hydrogen bonding and ascertain molecular miscibility.…”