A kind of preparation method of structural color thin film
A technology of structural color and thin film, which is applied in the direction of surface coating liquid devices, animal fibers, coatings, etc., can solve the problem of increasing the interaction force between microspheres and microspheres and substrates, the photonic crystal structure is easy to fall off, Insufficient adhesion and other problems, to achieve good application prospects, save production costs, and reduce the effect of wastewater treatment
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Embodiment 1
[0032] The polyester fabric is immersed in a 0.01% dopamine buffer solution solution, and after standing for 1 hour, the polyester fabric is taken out;
[0033] Prepare a monodisperse polystyrene-polymethyl methacrylate-polyacrylic acid emulsion particle aqueous solution with a particle size of 100nm, the concentration is 0.1wt%, and the solvent is water;
[0034] The dopamine buffer solution of the above-mentioned microsphere solution is mixed and uniformly dispersed by ultrasonic, the dopamine concentration in the mixed system is 0.01wt%, and then the polyester fabric is immersed in the above-mentioned mixed solution. Self-assembled at 20 °C and 10% humidity environment, the structural color film with high adhesion on the surface of polyester fabric was obtained. Addition of binder does not affect the color-related effects of structural color see appendix figure 1 , the photonic crystal structure is not easy to fall off and washable, see the attached figure 2 .
Embodiment 2
[0036] Immerse the plastic substrate in a solution of 0.1% 3,4-dihydroxyphenylpropylmethacrylamide (dopamine derivative) / 1ml ammonium bicarbonate buffer solution, let it stand for 48 hours, and then take out the plastic substrate;
[0037] Prepare an aqueous solution of monodisperse polystyrene latex particles with a particle size of 500nm, the concentration is 10wt%, and the solvent is water;
[0038] The dopamine buffer solution of the microsphere solution is mixed and uniformly dispersed by ultrasonic, the dopamine derivative concentration in the mixed system is 0.1wt%, and then the plastic substrate is immersed in the mixed solution. Self-assembly at a temperature of 80°C and a humidity of 90% resulted in a structurally colored thin film with high adhesion properties on plastic surfaces.
Embodiment 3
[0040] Immerse the aluminum alloy substrate in a solution of diisocyanate (polyurethane adhesive) with a concentration of 1%, and take it out after standing for 24 hours;
[0041] Prepare a monodisperse polyacrylic acid latex particle aqueous solution with a particle size of 300nm, the concentration is 1wt%, and the solvent is water;
[0042] The above-mentioned microsphere solution and the polyurethane adhesive were mixed and dispersed uniformly by ultrasonic, the concentration of the polyurethane adhesive in the mixing system was 1 wt%, and then the aluminum alloy substrate was immersed in the above-mentioned microsphere solution. Self-assembly at a temperature of 50°C and a humidity of 50% resulted in a structurally colored thin film with high adhesion on the aluminum alloy surface.
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