Transparent sound-absorption film surface hydrophobic self-cleaning coating and preparation method thereof
A sound-absorbing and thin-film technology, applied in the direction of coating, etc., can solve problems such as expensive raw materials, micropore blockage on the surface of sound-absorbing film, corrosion of sound-absorbing materials, etc., to achieve expanded use environment, good hydrophobic effect, and low manufacturing cost Effect
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[0029] The method for preparing a hydrophobic self-cleaning coating on the surface of a transparent sound-absorbing film of the present invention includes the following steps:
[0030] (1) Preparation of nano-silica particles; dissolve tetraethyl orthosilicate in ethanol solution, stir and maintain the temperature at 30~70℃, add ammonia solution and KH-570, tetraethyl orthosilicate dropwise to the mixed solution , The molar concentration ratio of ammonia to KH-570 is 1:3.2:1.53~1:11.2:1.53, continue the reaction, after the reaction, the mixed solution is dried and ground to obtain nano-silica particles;
[0031] (2) Preparation of polyvinylidene fluoride (PDVF) mixed solution: mix NN-dimethylformamide and methyl ethyl ketone, add vinylidene fluoride powder, NN-dimethylformamide and butyl ketone to the mixed solution. The molar volume ratio of ketone is 4:1, the added amount of vinylidene fluoride is 0.05g / ml, and the mixture solution of PDVF is obtained by stirring and dissolving; ...
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[0035] Example 1:
[0036] (1) Dissolve tetraethylorthosilicate (2ml) in (55mL) ethanol solution, stir and maintain the temperature at 30℃, add ammonia solution and KH-570, tetraethylorthosilicate, ammonia and KH dropwise to the mixture The molar concentration ratio of -570 is 1:8:1.53. Continue the reaction. After the reaction, the mixture is dried and ground to obtain nano-silica particles;
[0037] (2) Preparation of polyvinylidene fluoride (PDVF) mixed solution: mix 20mL of N,N-dimethylformamide and 5mL of methyl ethyl ketone, add 1.25g of vinylidene fluoride powder to the mixed solution, stir and dissolve to obtain PDVF mixture;
[0038] (3) The nano silica particles prepared in step (1) are added to the PDVF mixed solution in step (2), and the amount of nano silica particles added is 0.032 g / mL PDVF mixed solution. The mixed solution is emulsified by centrifugation and ultrasonic, and the ultrasonically dispersed solution is heated and stirred in a magnetic heating stirrer to...
Example Embodiment
[0041] Example 2:
[0042] (1) Dissolve tetraethylorthosilicate (2ml) in (55mL) ethanol solution, stir to maintain the temperature at 60℃, add ammonia solution and KH-570, tetraethylorthosilicate, ammonia and KH dropwise to the mixed solution The molar concentration ratio of -570 is 1:3.2:1.53, continue the reaction, after the reaction, the mixed solution is dried and ground to obtain nano-silica particles;
[0043] (2) Preparation of polyvinylidene fluoride (PDVF) mixed solution: mix 20mL of N,N-dimethylformamide and 5mL of methyl ethyl ketone, add 1.25g of vinylidene fluoride powder to the mixed solution, stir and dissolve to obtain PDVF mixture;
[0044] (3) Add the nano-silica particles prepared in step (1) to the PDVF mixed solution in step (2), and add the nano-silica particles at 0.024g / mL PDVF mixed solution. The mixed solution is emulsified by centrifugation and ultrasonic, and the ultrasonically dispersed solution is heated and stirred in a magnetic heating stirrer to mak...
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