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Structural, optical and thermal properties of benzofluoran-based thermochromic composite
Authors: Hajzeri Metka | Vatič Nika | Panák Ondrej | Kaplanová Marie | Klanjšek Gunde Marta
Year: 2013
Type of publication: článek ve sborníku
Name of source: SGA Conference Proceedings
Publisher name: Univerzita Pardubice
Place: Pardubice
Page from-to: 109-114
Titles:
Language Name Abstract Keywords
cze Strukturní, optické a termální vlastnosti termochromních systémů s benzofluoranovým barvivem. Termochromní systémy obsahující leukobarvivo, vývojku a rozpoštědlo vykazují reverzibilní barevnou změnu, kde systém je barevný , když je rozpouštědlo v tuhém stavu a bezbarvý, když je rozpoštědlo v kapalném stavu. Byly připraveny termochromní systémy se 4 koncentracemi vývojky bisphenolu A (BPA). Jako barvivo byl využit 6?-(diethylamino)-1?-2?benzofluoran (BF) a oktadekanol jako rozpouštědlo (OD) . Vlastnosti těchto systému byly analyzovány pomoví UV-VIS spektroskopie, FTIR spektroskopie a pomocí diferenciální skenovací kalorimetrie. termochromní systém; ; leukobarvivo; strukrurní vlastnosti; optické vlastnosti; tepelné vlastnosti
eng Structural, optical and thermal properties of benzofluoran-based thermochromic composite Thermochromic composites, consisting of leuco dye, colour developer and organic solvent indicate reversible thermochromism, with colouration in the solid state and discoloration in the molten state. These functional materials, the so-called smart materials, are of considerable interest in graphic art technology for applications such as temperature sensors, security markers, thermal printing, cutlery and clothing. Thermochromic composites of 6?- (diethylamino)-1?-2?-benzofluoran (BF) dye, 2,2-bis(4-hydroxypheniyl)propane (BPA) developer and 1-octadecanol (OD) solvent were investigated in this work. Composites with four different molar ratios of BPA were analysed. The chemical structure, thermal and optical properties of samples were analysed by UV-VIS and FTIR spectroscopy, colorimetric measurements and differential scanning calorimetry. The applied methods enable to study the properties of the material below and above the phase-changes. Much interest was devoted to analyse how different molar ratio of developer influence on the structural, optical and thermal properties of the composites. thermochromic composites; leuco dye; structural; optical; thermal properties

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