Reversible color changing effects can be induced into highly transparent hydrogels by adding suitable pH-sensitive indicator-dyes and appropriate
tensides. The thermochromic effect has its origin in the interaction of dye molecules with the microenvironment of the hydrogel. Besides a
switching between two different colors, multi step and colorless to color switching are also possible.
Color and transparency changes (Thermotropy) can be combined in one material, whereby the switching temperatures can be adjusted independently. Our long-term experiences in this field enable us to design hydrogels with customized thermotropic and/or thermochromic properties. The outstanding optical properties of hydrogels make these materials promising for the use in hybrid light and heat regulating sun protection glazing. Prototypes of such smart glazing with an area of up to 1m2 are currently tested under practical conditions.
Color and transparency changes (Thermotropy) can be combined in one material, whereby the switching temperatures can be adjusted independently. Our long-term experiences in this field enable us to design hydrogels with customized thermotropic and/or thermochromic properties. The outstanding optical properties of hydrogels make these materials promising for the use in hybrid light and heat regulating sun protection glazing. Prototypes of such smart glazing with an area of up to 1m2 are currently tested under practical conditions.