Method for preparing superhydrophobic coating by taking nano-cellulose and nano-particle as raw materials and modifying raw materials in aqueous solution with fluoride-free modifier
A technology of nano-cellulose and super-hydrophobic coatings, applied in cellulose coatings, coatings, etc., can solve problems such as poor mechanical stability and environmental impact, and achieve the effects of mild reaction conditions, high feasibility, and good hydrophobic properties
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[0035] Specific embodiment 1: In this embodiment, a method for preparing super-hydrophobic coatings by modifying nanocellulose and nanoparticles as raw materials in an aqueous solution without fluorine modifiers is carried out in the following steps:
[0036] 1. Disperse nano cellulose in deionized water, and then add γ-aminopropyltriethoxysilane and fluorine-free modifier in sequence under magnetic stirring at a speed of 50r / min~1000r / min to obtain modification Nano cellulose solution;
[0037] The mass ratio of the nanocellulose to the volume of deionized water is 1g:(100~500)mL; the mass ratio of the nanocellulose to the γ-aminopropyltriethoxysilane is 1:(0.1 ~5); The mass ratio of the nanocellulose to the fluorine-free modifier is 1:(0.25~10);
[0038] 2. Disperse the nanoparticles in deionized water, and then add hexadecyltrimethoxysilane and 15% to 88% formic acid with a mass percentage of 15% to 88% under magnetic stirring at a speed of 50r / min to 1000r / min to obtain Modifie...
Example Embodiment
[0050] Specific embodiment two: this embodiment is different from the specific embodiment one in that the particle size of the nanoparticles described in step two is 7nm-40nm. Others are the same as the first embodiment.
Example Embodiment
[0051] Specific embodiment three: this embodiment is different from specific embodiment one or two in that: the nano particles in step two are nano silica, nano titanium dioxide, nano ferroferric oxide, nano calcium carbonate, nano kaolin or nano Alumina. Others are the same as the first or second embodiment.
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