A kind of adhesive blue fluorescent coating and its preparation method and application
A blue fluorescence and adhesive technology, applied in the field of fluorescent materials and plant applications, can solve the problems of difficult degradation of light-converting agricultural film, complicated construction and operation, and inability to popularize and use, to avoid ultraviolet stress, improve photosynthetic activity, cost low effect
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[0047] The invention provides a method for preparing an adhesive blue fluorescent coating, comprising the following steps:
[0048] S1 uses citric acid and polyethyleneimine to prepare blue fluorescent carbon quantum dots;
[0049] S2 dissolves the blue fluorescent carbon quantum dots prepared in S1 in water to obtain a blue fluorescent carbon quantum dot solution;
[0050] S3 co-depositing the blue fluorescent carbon quantum dot solution and the polyphenol solution on the surface of the substrate to obtain an adhesive blue fluorescent coating, the polyphenol solution being a polyphenol compound solution induced by amine polymerization.
[0051] Among the above-mentioned preparation methods, preferably:
[0052] The preparation method of the blue fluorescent carbon quantum dots in the step S1 is as follows: fully stir and mix citric acid and polyethyleneimine in water, heat and evaporate the obtained solution at a constant temperature to obtain a colloid, then add water to co...
Embodiment 1
[0063] This embodiment discloses a method for preparing an adhesive blue fluorescent coating, comprising the following steps:
[0064] (1) Weigh 1g of citric acid and 5g of polyethyleneimine with an average molecular weight of 400. Polyethyleneimine is a multi-chain molecular polymer, mix them in a beaker, stir and dissolve them in 10mL of water;
[0065] (2) Heating the solution at 180° C. for 30 minutes to obtain a colloid;
[0066] (3) Add 1mL of water and continue heating until the water evaporates;
[0067] (4) Repeat step (3) ten times to obtain orange colloid;
[0068] (5) Wash the colloid with ethanol, then centrifuge and freeze-dry to obtain nitrogen-doped blue fluorescent carbon quantum dots;
[0069] (6) Prepare 40 mg / mL blue fluorescent carbon quantum dot solution and 5 mg / mL tannic acid solution and mix in equal proportions, and then coat on the surface of the substrate to obtain an adhesive blue fluorescent coating.
Embodiment 2
[0071] This embodiment discloses a method for preparing an adhesive blue fluorescent coating, comprising the following steps:
[0072] (1) Weigh 1g of citric acid and 100g of polyethyleneimine with an average molecular weight of 20,000. Polyethyleneimine is a mixture of linear molecular polymers and multi-chain molecular polymers, mix them in a beaker, stir and dissolve them in 100mL of water ;
[0073] (2) Heating the solution at 180° C. for 1 h to obtain a colloid;
[0074] (3) Add 10mL of water and continue heating until the water evaporates;
[0075] (4) Repeat step (3) fifteen times to obtain orange colloid;
[0076] (5) Wash the colloid with ethanol, then centrifuge and freeze-dry to obtain nitrogen-doped blue fluorescent carbon quantum dots;
[0077] (6) Configure 10mg / mL blue fluorescent carbon quantum dot solution and 2mg / mL catechin solution, and spray the blue fluorescent carbon quantum dot solution and catechin solution on the surface of the substrate synchronou...
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