Preparation method of micro-nano structured superhydrophobic coating based on nitrile rubber powder

A technology of superhydrophobic coating and nitrile rubber, which is applied in the field of coating and coating, can solve the problems of decreased hydrophobic performance and wear resistance restricting wide-scale application, and achieves low cost, wear resistance, green recyclability, and preparation simple effect

Active Publication Date: 2022-04-05
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the superhydrophobic performance of the surface mainly depends on the integrity of the micro-nano composite structure, slight wear of the surface microstructure will lead to a significant drop in hydrophobic performance. Therefore, the wear resistance of superhydrophobic coatings significantly restricts a wide range of industrial applications.

Method used

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  • Preparation method of micro-nano structured superhydrophobic coating based on nitrile rubber powder
  • Preparation method of micro-nano structured superhydrophobic coating based on nitrile rubber powder
  • Preparation method of micro-nano structured superhydrophobic coating based on nitrile rubber powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of the described micro-nano structure superhydrophobic coating based on nitrile rubber powder construction, consists of the following steps:

[0036] Step 1. The preparation of adhesive: first prepare the epoxy resin that mass percent concentration is 40% and 20% respectively, then the epoxy resin that mass percent concentration is 40% and 20% and tetraethylene pentamine with solid Mix and stir for 5 minutes at a mass ratio of 11:1 to prepare Adhesives 1 and 2, respectively.

[0037] Step 2. Apply adhesive 1 (thickness 0.01mm) on the glass sheet, spray a layer of nitrile rubber powder (thickness 0.8mm) on the surface by dry spraying process, wait for 3 minutes, use 0.94-1.66m 3 A blower with an air volume of / min blows off the unbonded rubber powder particles on the surface, and the glass sheet is cured in an electric blast drying oven at a constant temperature of 80°C for 1 hour.

[0038] Step 3. Apply adhesive 2 (thickness 0.1mm) on the glass s...

Embodiment 2

[0043] The difference between embodiment 2 and embodiment 1 is that the substrate used is stainless steel.

[0044]In step 2, the thickness of adhesive 1 is 0.01mm, and the thickness of nitrile rubber powder is 0.5mm

[0045] In step 3, the thickness of the adhesive 2 is 0.05 mm, and the thickness of the nitrile rubber powder is 0.5 mm.

[0046] The spraying thickness of step 4 is 0.01mm.

[0047] After curing, the contact angle measured by a contact angle tester was 159°, and the rolling angle was 3°. The coating was tested for wear resistance according to the American Society for Testing and Materials standard ASTM D 968-05 (the test for the determination of the wear resistance of organic coatings by falling sand abrasion method). The results showed that the coating was tested from a height of 5 kg of quartz sand After a 960 mm, 20 mm inner diameter conduit was dropped to perform an abrasion test on the coating. The static contact angle between the coating and water remai...

Embodiment 3

[0049] The difference between embodiment 3 and embodiment 1 is that the substrate used is a ceramic tile.

[0050] In step 2, the thickness of the adhesive 1 is 0.02 mm, and the thickness of the nitrile rubber powder is 1 mm.

[0051] In step 3, the thickness of the adhesive 2 is 0.2 mm, and the thickness of the nitrile rubber powder is 1 mm.

[0052] The spraying thickness of step 4 is 0.1mm.

[0053] After curing, the contact angle measured by a contact angle tester was 157°, and the rolling angle was 4°. The coating was tested for wear resistance according to the American Society for Testing and Materials standard ASTM D 968-05 (the test for the determination of the wear resistance of organic coatings by falling sand abrasion method). The results showed that the coating was tested from a height of 5 kg of quartz sand After a 960 mm, 20 mm inner diameter conduit was dropped to perform an abrasion test on the coating. The static contact angle between the coating and water ...

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Abstract

The invention belongs to the technical field of coating and painting, and in particular relates to a method for preparing a micro-nano structure super-hydrophobic coating based on nitrile rubber powder. The method comprises the following steps: (1) preparing high-concentration adhesive and low-concentration adhesive respectively; (2) smearing high-concentration adhesive on the base material, spraying a layer of nitrile rubber powder on its surface, and unsticking the surface The combined rubber powder particles are blown off and cured; apply a low-concentration adhesive on the substrate, spray a layer of nitrile rubber powder on the surface, blow off the unbonded rubber powder particles on the surface, and cure; (3) Epoxy resin, tetraethylenepentamine and vinyl silicone oil are mixed, dissolved in ethyl acetate and absolute ethanol, applied to the surface of the substrate prepared in step (2), and cured; (4) washing step (3) after curing Substrate. The invention has the advantages of simple synthesis route, high yield and less pollution, and the superhydrophobic coating prepared by the method has the advantages of price advantage, wear resistance and green recyclability.

Description

technical field [0001] The invention belongs to the technical field of coating and painting, and in particular relates to a method for preparing a micro-nano structure super-hydrophobic coating based on nitrile rubber powder. Background technique [0002] The research on preparing superhydrophobic surfaces has made great progress in the past 20 years. At present, the idea of ​​preparing superhydrophobic surfaces is relatively unified, mainly through the combination of surface micro-nano composite structure and low surface energy materials to obtain this property. Early research mainly focused on chemical synthesis methods, usually using fluorine-containing substances with low surface energy to form a coating with a certain microstructure on the desired surface through a series of chemical reactions, so as to obtain the imitation lotus leaf surface. With the development of deposition technology, PVD, CVD and other technologies have gradually been applied in the field of super...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D5/00B05D7/00B05D7/24B05D7/14C09D163/00C09D109/02C09D183/07B05D1/12
CPCB05D5/00B05D7/586B05D7/24B05D7/00B05D7/14C09D163/00C09D109/02B05D1/12B05D2202/15B05D2203/35B05D2203/30B05D2504/00B05D2530/00C08L83/04
Inventor 杨书刚高瑞祥王坤粟常红
Owner SHANDONG UNIV OF TECH
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