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Information × Registration Number 0220U100241, 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 14-01-2020 Organization V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine popup.description2 Modifications of hybrid nanocomposites with core-shell morphology based on nanotubes of the natural mineral halloysite (HA) and polyaniline (PANI) have been synthesized and studied to complement the series developed at the first stage. The modifications of nanocomposites synthesized under different conditions have been shown to differ in both the real content of PANI and its state in the composite, which causes significant differences in their electrical and sensory properties. The morphology of the developed nanocomposites has been studied depending on the ratio of polymer phase and HA nanotubes. The peculiarities of forming thin sensory layers of synthesized nanocomposites from dispersions in different solvents have been investigated. The influence of the nature of the solvent on the electrical and sensory properties of the formed sensory layers, in particular, the increase of their electrical conductivity in a series of chlorobenzene <ethanol <water, has been established. It has been shown that layers of nanocomposites with the content 7.0 - 15.8 wt.% of doped PANI formed from the dispersion in chlorobenzene are the optimal in the determination of ammonia by their strength of sensory responses, response rates and the form of calibration dependences. When determining volatile organic compounds, the nanocomposite with the doped polymer content of 7.0 wt.% is optimal, and ethanol is the optimal solvent for its dispersion preparation and application of thin sensory layers on the transducer electrodes. The increase in the humidity of the experimental gas medium has been found to reduce sensory responses and increase the response time of thin layers of the nanocomposites to ammonia. It has been found that the least water-sensitive nanocomposites with doped PANI content of 7.0 - 15.8 wt.% PANI give stable responses to ammonia in the range of RH% 35-50%. Product Description popup.authors Myroniuk Iryna Ye. Noskov Yuriy V. popup.nrat_date 2020-04-02 Close