SENSOR PROPERTIES OF POLYANILINE FILMS ON POLYETHYLENE TEREPHTHALATE SUBSTRATE
Journal Title: Праці Наукового товариства ім. Шевченка - Year 2017, Vol 48, Issue
Abstract
Single and bilayer films of polyaniline on the polyethylene terephthalate film substrate were synthesized by chemical oxidation in situ of 0.05 M aniline solution with ammonium peroxodisulfate in an aqueous solution of 0.5 M citric acid. The topology of polyaniline films on the polyethylene terephthalate matrix was studied using scanning electron and atomic force spectroscopies. It was discovered that polyaniline films are characterized by globular morphology. Optical properties of polyaniline on the polyethylene terephthalate substrate were investigated using ultraviolet and visible spectroscopy. It was shown that polyaniline films can be used to detect ammonia vapours. It was established that polyaniline doped with citric acid gives quick optical response to ammonia in the range of concentrations from 20 to 1000 ppm. It was determined that the sensitivity of single and bilayer films of polyaniline on the polyethylene terephthalate substrate to gaseous ammonia within its concentration of 20–200 ppm is 6.31∙10–4/ppm and 4.41∙10–4/ppm, respectively, and within its concentration of 200–1000 ррm – 0.57∙10–4/ppm and 0.24∙10–4/ppm, respectively.
Authors and Affiliations
Yuliia STETSIV
Keywords
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