Interpenetrating network super-hydrophobic dispersion liquid and preparation method thereof
An interpenetrating network and superhydrophobic technology, which is applied in the field of interpenetrating network superhydrophobic dispersion liquid and its preparation, can solve problems such as damage, low coating strength, affecting coating life and use range, and achieve good application prospects and preparation Simple method, excellent superhydrophobic effect
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Embodiment 1
[0043] Step 1: Evenly disperse 3.6g 15nm hydrophilic nano-silica in a mixture of 395.6g ethanol and 59.4g water, adjust the pH to 12 with 30.5g ammonia water, add 5.1g perfluorodecyl under stirring at room temperature Triethoxysilane and 10.4g of tetraethyl orthosilicate, after closed reaction for 24h, were centrifuged, precipitated and dried to form surface-modified nanoparticles;
[0044] Step 2: Mix the nanoparticles obtained in Step 1 with 80 g of ethyl acetate, and ultrasonically disperse for 30 minutes, then add 8.8 g of isophorone diisocyanate, 10.0 g of polytetramethylene ether glycol with a molecular weight of 1000, and 0.6 g of trihydroxyl Methyl propane, 0.05g dibutyltin dilaurate were reacted at 80°C for 4h to form a polyurethane prepolymer, 0.8g DMPA dissolved in 15.0g N-methylpyrrolidone was added to react for 2h, and then 1.75g hydroxyethyl methacrylate was added to end capping The reaction was carried out for 2 hours, the ice water bath was cooled to 0-5°C, a...
Embodiment 2
[0049] Step 1: Disperse 4.0g 30nm hydrophilic graphite oxide evenly in a mixture of 250.8g ethanol and 26.0g water, adjust the pH to 10 with 18.0g ammonia water, add 2.5g vinyltriethoxysilane under stirring at room temperature and 6.6g of dimethyldiethoxysilane, and after closed reaction for 24h, the surface-modified nanoparticles were formed by centrifugation, precipitation and drying;
[0050] Step 2: After mixing the nanoparticles obtained in step 1 with 65g butanone, ultrasonically dispersing for 30min, adding 8.0g toluene diisocyanate, 14.0g polycarbonate diol with molecular weight of 1000, 0.73g glycerol, 0.04g dilauric acid Dibutyltin was reacted at 80°C for 4h to form a polyurethane prepolymer, 0.6g DMPA dissolved in 12.0g N-methylpyrrolidone was added and reacted for 2h, then 1.4g hydroxyethyl acrylate was added to react for 2h, and the temperature was cooled to 0-5°C in an ice-water bath. , 80g aqueous solution of 0.16g ethylenediamine was added dropwise to emulsify,...
Embodiment 3
[0055] Step 1: Evenly disperse 3.0g 10nm hydrophilic graphene oxide in a mixture of 200g ethanol and 22.0g water, adjust the pH to 10 with 15.0g ammonia water, add 3.0g vinyltrimethoxysilane and 6.9g of trimethylmethoxysilane, which was centrifuged, precipitated, and dried to form surface-modified nanoparticles after a closed reaction for 24 hours;
[0056] Step 2: Mix the nanoparticles obtained in Step 1 with 70 g of methyl ethyl ketone and ultrasonically disperse them for 30 min, then add 8.0 g of toluene diisocyanate, 12.6 g of polybutylene adipate with a molecular weight of 1000, 0.8 g of glycerin, 0.04 g of Dibutyltin dilaurate was reacted at 70°C for 4h to form a polyurethane prepolymer, 0.7g of DMBA dissolved in 12.0g of N-methylpyrrolidone was added for 2h, and then 1.75g of 4-hydroxybutyl acrylate was added to react for 2h, ice-water bath Cool down to 0-5°C, add dropwise 85g aqueous solution of 0.1g ethylenediamine to emulsify, then remove the solvent ethyl acetate ...
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