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Super-wear-resisting super-hydrophobic coating and preparation method thereof

A super-hydrophobic coating and super-wear-resistant technology, used in coatings, polyurea/polyurethane coatings, primers, etc., can solve problems such as difficulty in use and need to improve wear resistance, saving costs and enhancing decorative effects , the effect of shortening the preparation cycle

Active Publication Date: 2017-02-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used method for enhancing superhydrophobic coatings is to bond superhydrophobic coatings to substrates with organic resins as a binder through a two-step coating method. Although its toughening effect is very obvious, it greatly expands its However, its wear resistance still needs to be improved, and it is still difficult to use in many fields

Method used

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  • Super-wear-resisting super-hydrophobic coating and preparation method thereof
  • Super-wear-resisting super-hydrophobic coating and preparation method thereof
  • Super-wear-resisting super-hydrophobic coating and preparation method thereof

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preparation example Construction

[0044] The preparation method comprises the following steps:

[0045] (1) Primer preparation: Mix polyether polyol resin and micropowder particles mechanically for 30-60 minutes until uniform, let stand for degassing for 60-120 minutes, then add isocyanate and fumed silica, and stir rapidly for 2-10 minutes until uniform Finally, it is coated on the surface of the substrate by brushing or spraying, and the thickness of the film is set to 0.5 μm to 10 mm through the number of coating passes and the amount of coating, and cured at room temperature for 1 to 2 hours; the cured resin is sandblasted, Grinding with coarse sandpaper or grinding wheel to remove the smooth crust surface to obtain a rough surface, the wear thickness is 0.5-5μm, the high-pressure sandblasting refers to the compressed air pressure of 0.5-1Mpa, the sandblasting is silica sand or corundum, and the particle size is 40-60 mesh ;

[0046] (2) Topcoat preparation: Add hydrophobic nanoparticles or hydrophobically ...

Embodiment 1

[0048] In 100g of solvent-free aliphatic polyether polyol resin, add 50g of sludge powder ( figure 1 a) Stir mechanically for 30 minutes until uniform, let it stand for degassing for 60 minutes, then add 50g of di-tetramethylbenzene diisocyanate and 1g of fumed silica, stir rapidly for 2 minutes until uniform, then brush on the surface of the substrate, and obtain porous after curing at room temperature for 1 hour Rigid polyurethane resin primer ( figure 1 b); Disperse 40g of hydrophobic zinc oxide nanoparticles in 1L of acetone solution, obtain a uniformly dispersed superhydrophobic coating after ultrasonic dispersion and mechanical stirring for 30min, and spray it on the resin surface after high-pressure sandblasting rough treatment, at room temperature After drying, a super-abrasive and super-hydrophobic coating can be obtained, and its surface micromorphology is as follows: figure 1 As shown in c, its water contact angle is 167.3°, and its rolling angle is 2.8°.

Embodiment 2

[0050] Add 400g of fly ash to 400g of solvent-free aliphatic polyether polyol resin, stir mechanically for 60min until uniform, let it stand for degassing for 120min, then add 400g of di-tetramethylbenzene diisocyanate and 5g of fumed silica, stir rapidly for 10min until uniform Afterwards, it is brushed on the surface of the substrate, cured at room temperature for 2 hours, and then polished with a grinding wheel to obtain a rough surface; disperse 20g of silicon dioxide hydrophobic nanoparticles with a particle size of 5-200nm in 1L of butyl acetate solution, ultrasonically disperse, and mechanically stir Obtain evenly dispersed superhydrophobic coating after 30min, after brushing it on the above-mentioned rough surface and drying at normal temperature, you can obtain super wear-resistant superhydrophobic coating ( figure 2 a), after the film was rubbed 2000 times by fingers ( figure 2 The water contact angle of b) is 154.3° ( figure 2 c), the rolling angle is 7.6°, or t...

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Abstract

The invention discloses super-wear-resisting super-hydrophobic coating and a preparation method thereof; the coating is prepared by: stirring well and dispersing non-solvent aliphatic polyether polyol resin, micro-powder granules, 2,4-toluenediisocyanate and fumed silica nanoparticles, applying to the surface of a substrate by brushing or spraying technology, roughing the surface after full curing, spraying, brushing or dipping super-hydrophobic nano coating to the surface of resin primer, and naturally drying. The super-wear-resisting super-hydrophobic coating and the preparation method thereof have the advantages that the equipment and process are simple, operating is easy, and the cost is low; and have industrial scale production prospect. The super-wear-resisting super-hydrophobic coating prepared herein features high bonding force, high hardness and the like, is capable of bearing destruction from external forces such as high pressure friction, and is applicable to the fields, such as building, shipping, naval craft, aircrafts, automobiles, high-speed railway, and wind generators.

Description

technical field [0001] The invention belongs to the field of coating preparation, in particular to a super-abrasive and super-hydrophobic coating and a preparation method thereof. Background technique [0002] The preparation of materials with superhydrophobic properties by biomimetic superwetting surfaces such as lotus leaves has received extensive attention and a large number of preparation techniques have been developed. However, the fragile anti-wear performance of superhydrophobic materials has always been the bottleneck of its development. Coating is one of the most mature materials in the industrial development at present. Its excellent designability makes it an important way to solve the wearability of superhydrophobic materials, and provides favorable conditions for the industrial scale production of superhydrophobic materials. At present, the commonly used method for enhancing superhydrophobic coatings is to bond superhydrophobic coatings to substrates with organi...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D175/08C09D7/12C09D5/00
CPCC08K3/346C08K3/36C08K11/005C08K2201/011C09D1/00C09D5/002C09D7/61C09D175/08
Inventor 张友法王山林余新泉
Owner SOUTHEAST UNIV
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