The structural factors affecting the sensory properties of polyaniline derivatives

Abstract

This study is the first report that includes the experimental data on the use of a wide range of new substituted polyaniline (PANI) derivatives as a sensitive material in sensors.

Influence of copolymer composition on the properties of soluble poly(aniline‐co‐2‐[2‐chloro‐1‐methylbut‐2‐en‐1‐yl]aniline)s

“…For all samples, a slow change in conductivity is observed in the initial period and a sharp increase at RH > 60%–70%. A similar observation was also found for previously synthesized and studied PANI derivatives of various structures 35 . Presumably, the electrical conductivity of the polymer film increases with an increase in ambient humidity due to an increase in the mobility of the doping ion that is weakly bound to the polymer chain by van der Waals forces 36 .…”

“…A significant increase in the solubility of the presented series of polymers, P(Ani‐ co ‐ClPA)1–P(Ani‐ co ‐ClPA)5, made it possible to create homogeneous thin films and use them as an active layer in resistive gas sensors. Previously, the formation of thin polymer films from a poly(2‐[2‐chloro‐1‐methylbut‐2‐en‐1‐yl]aniline) solution was studied and the most advantageous conditions were selected 35 . Film thickness and roughness were measured using AFM analysis.…”

“…Previously, a detailed study of the influence of various structural factors on the sensory properties of a wide range of PANI derivatives was carried out 35 . It is known that the introduction of a substituent into the PANI polymer chain leads to a change in the morphology, electrical conductivity and solubility of the sample, which, in turn, affects the sensitivity of the material 35 .…”

“…Previously, a detailed study of the influence of various structural factors on the sensory properties of a wide range of PANI derivatives was carried out 35 . It is known that the introduction of a substituent into the PANI polymer chain leads to a change in the morphology, electrical conductivity and solubility of the sample, which, in turn, affects the sensitivity of the material 35 . A comparison of copolymers with different monomer molar ratios showed that the P(Ani‐ co ‐ClPA)1 and P(Ani‐ co ‐ClPA)4 samples were the most sensitive to moisture (Fig.…”

Effect of the morphology of films of polyaniline derivatives poly-2-[(2E)-1‑methyl-2‑butene-1‑yl]aniline and poly-2-(cyclohex-2‑en-1‑yl)aniline on sensory sensitivity to humidity and ammonia vapors

“…H + ions in PANI derivatives lead to protonation of the polymer chain; the formation of emeraldine salt and, as a consequence, an increase in electrical conductivity. The properties of synthesized polymers can be improved, but the advantages of polymer organic coatings in the production of electronic materials with unique properties are obvious [55].…”