Luminescent material and preparation method and application thereof
A technology of luminescent materials and organic dyes, applied in the field of materials, can solve the problems of increasing material costs, time, and limited materials, and achieve the effects of fast preparation speed, low cost, and high efficiency
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Embodiment 1
[0049] In this embodiment, a luminescent material is prepared, specifically, an aluminum sulfate-based long afterglow material doped with calcein sodium salt.
[0050] Wherein, the structure of calcein sodium salt is shown in the following formula (I):
[0051]
[0052] The specific process is:
[0053] (1) Prepare an aqueous solution of calcein sodium salt with a concentration of 10 mg / mL and an aqueous solution of aluminum sulfate at 200 mg / mL. Subsequently, the concentration of calcein sodium salt solution was diluted to 1 mg / mL, 0.1 mg / mL, 0.01 mg / mL and 0.001 mg / mL.
[0054] (2) Add 0.5 mL of calcein sodium salt solution with a concentration of 0.001 mg / mL into 5 mL of an aluminum sulfate solution with a concentration of 200 mg / mL, oscillate and sonicate evenly. Then, drop the obtained mixed solution onto a glass sheet or add it to an evaporating dish, heat at 200° C. for 0.5 hour, evaporate and crystallize to remove the solvent, and obtain an aluminum sulfate-based ...
Embodiment 2
[0057] In this embodiment, a luminescent material is prepared, specifically, an aluminum sulfate-based long-lasting material doped with fluorescein sodium salt. Wherein, the structure of fluorescein sodium salt is shown in the following formula (II):
[0058]
[0059] The specific process is:
[0060] (1) Prepare an aqueous solution of fluorescein sodium salt with a concentration of 5 mg / mL and an aqueous solution of aluminum sulfate at a concentration of 200 mg / mL. Subsequently, the fluorescein sodium saline solution was diluted to 1 mg / mL, 0.1 mg / mL, 0.01 mg / mL and 0.001 mg / mL.
[0061] (2) Add 0.5 mL of fluorescein sodium salt solution with a concentration of 0.001 mg / mL into 5 mL of aluminum sulfate solution with a concentration of 200 mg / mL, oscillate and sonicate evenly. Then, drop the obtained mixed solution onto a glass sheet or add it to an evaporating dish, heat at 140° C. for 1 hour, evaporate and crystallize to remove the solvent, and obtain an aluminum sulfat...
Embodiment 3
[0064] This embodiment provides the application of the above materials, and the luminescent material in embodiment 1 is prepared into an anti-counterfeiting pattern for anti-counterfeiting.
[0065] The aluminum sulfate-based long afterglow materials with different doping concentrations of calcein sodium salt and the polydimethylsiloxane prepolymer are respectively in a mass ratio of 1:1.5 (usually within the mass ratio range of 1:1 to 4) Mixing, heating and curing at 80°C (60-120°C) to obtain silicone rubber containing aluminum sulfate-based long afterglow material. Then, the obtained silicone rubber is processed into different shapes and combined into a "lotus flower" pattern. Using the difference in the afterglow performance of the aluminum sulfate-based long-lasting materials contained in different parts of the pattern, the afterglow pattern can be observed after removing the ultraviolet light or white light excitation light source changes over time, resulting in Figure ...
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