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Information × Registration Number 0223U000127, 0118U006175 , R & D reports Title Development of intelligent sensory system with sensing elements based on hybrid conducting nanocomposites for the registration of environmentally harmful volatile compounds. Section 1. Development, manufacturing and optimization of new sensing materials on the basis of conducting hybrid nanocomposites. popup.stage_title Head Pud Oleksandr A., Доктор хімічних наук Registration Date 03-01-2023 Organization V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine popup.description2 The series of nanocomposite materials for chemiresistive sensors were developed, synthesized and studied namely hybrid nanocomposites with a "core-shell" morphology based on halloysite nanotubes (HNTs) with different content of doped polyaniline (PANI-TSA), the materials based on the nanocomposite HNT/PANI-TSA distributed in the dielectric matrix of polyvinyl alcohol, and the set of materials made on PANI-coated carbon nanotubes distributed in various polymer matrices PVDF, PVC, PMMA. On base of analysis of thermogravimetric and spectral data, the results of electrical conductivity and sensory properties study of HNT/PANI-TSA nanocomposites the special state of the polymer phase of PANI-TSA at the interface of HNT is shown compared to that synthesized in the absence of HNTs. It was established that the content of polyaniline significantly affects the properties of thin sensor layers of these nanocomposites, in particular, their sensitivity to volatile organic compounds (VOCs) and ammonia. The nanocomposites with the PANI-TSA content of 7.0 wt.% and 15.8 wt.% are the most sensitive. It is shown that the conditions of formation of HNT/PANI-TSA sensor layers, namely the content of the composite in the dispersion, the nature of the solvent, the duration of ultrasonic treatment, the method of applying the dispersion to electrodes, etc. significantly affect the process of their interaction with VOCs and ammonia and therefore on the quality and intensity of sensory responses. The conditions and parameters of the formation of thin sensor layers of HNT/PANI-TSA nanocomposites, which lead to increased sensitivity and selectivity, are worked out. The standardized manufacturing methods are developed for each nanocomposite/analyte pair. The sensor layers kits manufactured using these methods were used in the experimental testing and standardization of the portable sensor device under development, conducted in cooperation with a team of co-implementers from the V.Ye. Lashkaryov I Product Description popup.authors Myronyuk Iryna Ye. Noskov Yuriy V. popup.nrat_date 2023-01-03 Close