Effects of Excess Cu Addition on Photochromic Properties of AgCl-Urethane Resin Composite Films

Abstract

AgCl-resin photochromic composite films were prepared using AgNO3, HCl-EtOH, CuCl2ethanol solutions, and a urethane resin as starting materials. The AgCl particle size in the composite films, which was confirmed via TEM observations, was 23–43 nm. The AgCl composite films showed photochromic properties: coloring induced by UV-vis irradiation and bleaching induced by cessation of UV-vis irradiation. The coloring and bleaching speed of the composite film increases with increasing CuCl2mixing ratio.

Light-Induced Tunable n-Doping of Ag-Embedded GO/RGO Sheets in Polymer Matrix

“…The reversibility of the sample is shown by stages 3 and 4 in Figure . The photochromic effect of Ag halide is known to be reversible. , However, the reaction is “asymmetric” in the sense of time needed to go forward and backward. The forward movement is much faster, whereas in the backward movement in the dark, the reaction is slower.…”