Behavior of chromogenic pigments and influence of binder in organic smart coatings

摘要

Chmmogenic commercial pigments belonging to different classes of smart materials (photochromic and thermochromic) were selected from commercially available examples: a photochromic pigment, able to change from colorless to purple when radiated with UV light; a thermochromic pigment, changing from red to colorless above 31 degrees C, and a thermochromic changing from orange to yellow above 28 degrees C. All the pigments were produced by SFXC. They were chemically analyzed using SEM, EDXS and FTIR in order to understand their composition and the mechanisms responsible for their chmmogenic behavior. Their behavior was studied by triggering the color transitions. The pigments were introduced in an epoxy binder to produce smart paints.