Sio2-based self-cleaning paint and self-cleaning glass and preparation method thereof
A self-cleaning and coating technology, applied in the direction of coating, etc., can solve the problems of inapplicability to large-scale processing, high cost, and environmental impact, and achieve excellent super-hydrophilic effect, low processing cost, and good self-cleaning and weather resistance
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Embodiment 1
[0024] 1. Preparation of self-cleaning coatings:
[0025] 1) Take 25ml of water-based silica sol (particle size 8-20nm, solid content 5%), add 0.3g of polyvinylpyrrolidone K30 into it, stir and mix well. Among them, polyvinylpyrrolidone is a dispersant.
[0026] 2) Dilute the above solution with deionized water until the solid content of silica is 1.2%, stir and mix evenly.
[0027] 3) Add 0.02% (volume ratio) of alkoxy-modified polytrisiloxane and 0.02% (volume ratio) of silane coupling agent KH-570 to the above solution in turn, mix well and set aside. Wherein alkoxy modified polytrisiloxane is used as surfactant.
[0028] 2. Preparation of self-cleaning curtain wall glass:
[0029] Take prepared SiO 2 The self-cleaning coating solution is evenly sprayed on the clean glass substrate, then cured at room temperature for 20 minutes, and finally heat-cured at 400°C for 20 minutes to obtain self-cleaning curtain wall glass.
[0030] figure 1 It is the test result of the con...
Embodiment 2
[0033] 1. Preparation of self-cleaning coatings:
[0034] 1) Take 25ml of water-based silica sol (particle size 8-20nm, solid content 5%), add 0.3g of polyvinylpyrrolidone K30 into it, stir and mix well;
[0035] 2) Dilute the above solution with deionized water until the solid content of silica is 1.2%, stir and mix evenly;
[0036] 3) Add 0.01% (volume ratio) of alkoxy-modified polytrisiloxane and 0.01% (volume ratio) of KH-570 to the above solution in turn, mix well and set aside.
[0037] 2. Preparation of self-cleaning curtain wall glass:
[0038] Take prepared SiO 2 The self-cleaning coating solution is evenly sprayed on the clean glass substrate, then baked with hot air at 80°C for 1 minute, and finally cured according to the glass tempering process to obtain the self-cleaning curtain wall glass.
Embodiment 3
[0040] 1. Preparation of self-cleaning coatings:
[0041] 1) Take 25ml of water-based silica sol (particle size 8-20nm, solid content 2%), add 0.1g of polyvinylpyrrolidone K30 into it, stir and mix evenly;
[0042] 2) Dilute the above solution with deionized water until the solid content of silica is about 1.2%, stir and mix evenly;
[0043] 3) Add 0.05% (volume ratio) of alkoxy-modified polytrisiloxane and 0.01% (volume ratio) of silane coupling agent KH-570 to the above solution in turn, mix well and set aside.
[0044] 2. Preparation of self-cleaning curtain wall glass:
[0045] Take prepared SiO 2 The self-cleaning coating solution is evenly sprayed on the clean glass substrate, then baked with hot air at 80°C for 1 minute, and finally cured according to the glass tempering process to obtain the self-cleaning curtain wall glass.
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