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Preparation method for polyurethane/molybdenum disulfide superamphiphobic coating layer

A molybdenum disulfide, super-hydrophobic coating technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor stability and durability, strict preparation conditions, cumbersome steps, etc., to achieve convenient implementation and preparation process. Simple, low-cost effect

Active Publication Date: 2014-05-14
连云港泽阳装饰材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the broad application prospects and research value of super-amphiphobic surfaces, people use various methods and approaches to prepare such surfaces; , fiber fabrics, fluorinated polymers and nanoparticles, a series of surfaces with super-amphiphobic properties have been prepared; these research results are of great significance to the theoretical research of super-oleophobic surfaces and are expected to be applied in practice; nevertheless , but some problems still need to be solved, such as strict preparation conditions, cumbersome steps, expensive materials and poor stability and durability; It is very necessary to construct a superamphiphobic surface on

Method used

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  • Preparation method for polyurethane/molybdenum disulfide superamphiphobic coating layer
  • Preparation method for polyurethane/molybdenum disulfide superamphiphobic coating layer
  • Preparation method for polyurethane/molybdenum disulfide superamphiphobic coating layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the first step, 2.0 g of polyurethane resin was weighed, diluted with 20 mL of ethyl acetate solution, and dissolved evenly by magnetic stirring; then 1.5 g of molybdenum disulfide was weighed, added to the polyurethane resin solution, magnetically stirred for 2 h, and ultrasonically oscillated for 20 min.

[0024] In the second step, use 500# metallographic sandpaper to polish a 45# steel block with a specification of 20 mm×10 mm×10 mm. After smoothing, put it into an acetone solution for ultrasonic cleaning, and take it out to dry.

[0025] In the third step, the material obtained in step 1 was sprayed on the substrate treated in step 2 under nitrogen gas of 0.2 Mpa, with a film thickness of 20 μm. After natural air drying for 20 min, it was placed in a forced air drying oven at 80 °C for 2 h. .

[0026] In the fourth step, put the sample that has been left for more than 12 hours after cooling in step 3 into a vacuum container, and put the weighing bottle dripped ...

Embodiment 2

[0029] The first step is to weigh 2.0 g of polyurethane resin, dilute it with 15 mL of ethyl acetate and 15 mL of acetone mixed solvent, and stir to dissolve evenly; then weigh 2.0 g of molybdenum disulfide, add it to the polyurethane resin solution, and stir magnetically for 2 h, ultrasonic oscillation for 30 min.

[0030] In the second step, use 500# metallographic sandpaper to polish the tinplate sheet with a specification of 120 mm × 50 mm × 1 mm. After smoothing, put it into an acetone solution for ultrasonic cleaning, and take it out to dry.

[0031] In the third step, the material obtained in step 1 was sprayed on the substrate treated in step 2 under 0.3 Mpa nitrogen gas, with a film thickness of 30 μm. After natural air drying for 20 min, it was placed in a blast drying oven at 100 °C for 1.5 h. .

[0032] In the fourth step, put the sample that has been left for more than 12 hours after cooling in step 3 into a vacuum container, and put the weighing bottle dripped w...

Embodiment 3

[0035] The first step is to weigh 2.0 g of polyurethane resin, dilute it with 25 mL of ethyl acetate and 15 mL of acetone mixed solvent, and dissolve it evenly with magnetic stirring; then weigh 2.5 g of molybdenum disulfide, add it to the polyurethane resin solution, and stir magnetically for 2 h, ultrasonic oscillation for 40 min.

[0036] In the second step, select a glass slide with a size of 76.4 mm × 25 mm × 1 mm, wipe the surface of the slide with a cotton ball dipped in acetone solution, wipe it clean and dry it.

[0037] In the third step, the material obtained in step 1 was sprayed on the substrate treated in step 2 under 0.4 Mpa nitrogen gas, with a film thickness of 40 μm. After natural air drying for 20 min, it was placed in a forced air drying oven at 120 °C for 1 h. .

[0038] In the fourth step, put the sample that has been left for more than 12 hours after cooling in step 3 into a vacuum container, and put the weighing bottle dripped with 1H, 1H, 2H, 2H-perfl...

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Abstract

The invention relates to the technical field of superamphiphobic materials and in particular relates to a preparation method for a polyurethane / molybdenum disulfide super-hydrophobic and super-oleophobic coating layer. According to the preparation method, a polyurethane / molybdenum disulfide composite micron / nano-level rough surface is prepared; the contact angle between the surface of the coating layer and water is larger than 150 degrees; the coating layer is modified through 1H, 1H, 2H, 2H-perfluorooctane oxygroup trichlorosilane, so that the surface of the obtained coating layer is superamphiphobic. The superamphiphobic surface repels water, glycerinum, ethylene glycol, colleseed oil, cetane and the like; the contact angle between the superamphiphobic surface and the water is larger than 160 degrees, and a rolling angle is smaller than 3 degrees; the contact angle between the superamphiphobic surface and liquid such as cetane and the colleseed oil is larger than 150 degrees, and rolling angles are all smaller than 10 degrees. The superamphiphobic coating layer prepared by the preparation method is high in stability and can be sprayed to different materials; furthermore, the technology is simple; large-area preparation of the superamphiphobic surface is facilitated, and industrial manufacturing is facilitated.

Description

technical field [0001] The invention relates to the technical field of superamphiphobic materials, more specifically, to a method for preparing a polyurethane / molybdenum disulfide superhydrophobic and superoleophobic film coating. Background technique [0002] There are a large number of superhydrophobic surfaces in nature, which refer to rough surfaces with a contact angle greater than 150° and a rolling angle less than 10°; through bionic research on the superhydrophobic properties of plant leaf surfaces, the researchers proposed that the focus of preparing superhydrophobic surfaces is Effectively construct rough surface structure and carry out surface chemical modification to reduce surface energy, and some important progress has been made in the preparation method, formation mechanism and functional research of superhydrophobic surface; however, superhydrophobic surface will inevitably be damaged during use. Contact with some oily substances, these substances have low su...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/12
Inventor 杨进汤永才唐华李长生
Owner 连云港泽阳装饰材料有限公司
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