Preparation method for durable, transparent and superhydrophobic coating applicable to plurality of substrates
A super-hydrophobic coating and durability technology, applied in coatings, fire-retardant coatings, etc., can solve the problems of inability to meet the outdoor environment, complex film-forming process, poor chemical stability, etc., and achieve low cost, simple preparation method, and production cost. low effect
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[0029] The first aspect of the present invention provides a method for preparing a durable transparent superhydrophobic coating adapted to various substrates, the steps comprising:
[0030] S1, take nano-scale SiO 2 Dissolve the particles in an alcoholic solvent and disperse them ultrasonically for 2-8 hours to obtain evenly dispersed SiO 2 suspension;
[0031] S2, take SiO 2 Add an alkyl chain silane coupling agent and hydrochloric acid solution to the suspension under stirring, and ultrasonically disperse and stir for 2 to 8 hours to obtain a sol-like precursor solution; the added volume of the alkyl chain silane coupling agent is equal to that of SiO 2 The volume of the suspension is equal;
[0032] S3, the precursor solution is centrifuged and dried to obtain a white powder, and vacuum-dried to obtain partially methyl-modified SiO 2 powder;
[0033] S4, get the SiO of step S3 2 The powder is dissolved in an alkane solvent, silicone is added to the solution, and the d...
Embodiment 1
[0049] This embodiment provides a method for preparing a durable transparent superhydrophobic coating adapting to various substrates, by adding nano-scale SiO 2 The particle reacts with the silane coupling agent at room temperature, undergoes acidification treatment to obtain a sol-like precursor solution, and obtains a superhydrophobic powder after drying at a high temperature. Mix the superhydrophobic powder with polydimethylsiloxane in an alkane solvent and disperse it ultrasonically, so that PDMS is partially coated with SiO 2 The particles are obtained from a dispersion, coated on the surface of the substrate, and then subjected to heat treatment to obtain a super-hydrophobic coating. Specifically include the following steps:
[0050] (1) Take nano-scale SiO 2 Dissolve 2g of particles in 20ml of solvent alcohol, and ultrasonically disperse for 5h to obtain uniformly dispersed SiO 2 Suspension; the solvent alcohol is obtained by mixing ethanol and n-propanol in a volume...
Embodiment 2
[0056] The present embodiment provides a kind of preparation method of the durable transparent superhydrophobic coating that adapts to various substrates, comprises the following steps:
[0057] (1) Take nano-scale SiO 2 Dissolve 2g of particles in 20ml of solvent alcohol, and ultrasonically disperse for 6h to obtain uniformly dispersed SiO 2 suspension; the solvent alcohol is isopropanol.
[0058] (2) SiO of equal amount step (1) 2 2 ml of alkyl chain silane coupling agent and 0.1 ml of 28% hydrochloric acid solution were added to the suspension under stirring. Ultrasonic dispersion and stirring for 6 hours to obtain a sol-like precursor solution; the alkyl chain silane coupling agent is aminopropyltriethoxysilane.
[0059] (3) The precursor solution of the same amount of step (2) is centrifuged and dried to obtain a white powder, which is dried in a vacuum to obtain partially methylated SiO 2 powder;
[0060] (4) Get the SiO of 0.3g step (3) 2 Powder, dissolved in 20ml...
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