Synthesis and sensor properties of polyaniline derivatives

Experimental data on the use of a wide range of polyaniline (PANI) derivatives as a sensitive material in humidity sensors are presented. The influence of various structural factors, such as the nature and structure of substituents, on the sensitivity to environmental humidity has been investigated. The use of PANI derivatives as a sensitive material in resistive sensors demonstrated a high response of electrical conductivity to humidity changes. It has been established that the modification of PANI by introduction of a substituent into the aromatic ring not only improves the solubility, but also increases the sensitivity of the material to environmental humidity due to the formation of a structure with a large surface area.