Studies on the Synthesis and its Properties of Reversible Red-Thermochromic Materials

Abstract

The synthesis of reversible red-thermochromic materials when temperature range at re-spectively 36.0～39.5°C, 44.5～46.5°C, 51.0～53.5°C with the tetradecanol, hexadecanol and octa-decanol as corresponding solvents, letlacton compound of 3-diethylamino-7,8-phenyl-fluoran as procrypsis dye as color agent were studied in this paper. The chromic properties of reversible red-thermochromic materials by infrared spectrum technology were analyzed.Experiment shows, In the reversible thermochromic materials, the solvent to determine its color temperature, color agent is mainly to determine its color depth, procrypsis dye itself to determine its color and stability proper-ties. The optimal matchs of procrypsis dye, color agent and solvent are 1:4:30(tetradecanol), 1:3:40(hexadecanol), 1:2:20(octadecanol) respectively. This paper has theoretical and practical di-rection function in counterfeiting printing and packaging field of reversible thermochromic material.