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Ultra-hydrophobic surface coating material and preparation method thereof

A technology of super-hydrophobic surface and surface coating, which can be applied to devices, coatings, special surfaces, etc. for coating liquids on the surface. The method is simple, the preparation process is simple, and the effect of high production cost

Inactive Publication Date: 2008-09-24
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to propose a superhydrophobic functional material of polyalkylsiloxane with a layered crystal structure in order to improve existing superhydrophobic coating materials such as low superhydrophobicity and narrow application range. Another purpose of the invention is to improve the existing super-hydrophobic surface preparation method and overcome the environmental problems existing in the preparation process, such as high manufacturing cost and complicated preparation process, and propose a new preparation method for super-hydrophobic coating materials

Method used

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  • Ultra-hydrophobic surface coating material and preparation method thereof
  • Ultra-hydrophobic surface coating material and preparation method thereof
  • Ultra-hydrophobic surface coating material and preparation method thereof

Examples

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Embodiment 1

[0043] Hot piranha is prepared by mixing concentrated sulfuric acid and hydrogen peroxide in a 2:1 ratio. Immerse the clean glass piece in Piranha for activation treatment. After 45 minutes, take out the glass piece, wash it with a large amount of ultrapure water, and dry it with nitrogen gas. Toluene was used as solvent, mixed with 2% OTS solution, and the treated glass sheet was coated by immersion coating method. The coated glass sheet was dried in air for 20 seconds, immersed in acetone for 5 seconds, taken out, heat treated at 100°C for 3 hours, and left in air for 20 hours to obtain a thickness of 25 microns, a rolling angle of 3 degrees, and a contact angle of 155 degree hydrophobic membrane.

Embodiment 2

[0045] Hot piranha is prepared by mixing concentrated sulfuric acid and hydrogen peroxide in a 3:1 ratio. Immerse the clean glass piece in Piranha for activation treatment. After 45 minutes, take out the glass piece, wash it with a large amount of ultrapure water, and dry it with nitrogen gas. DTS: TEOS molar ratio = 10: 1, directly sprayed onto the silicon wafer, steamed for 50 seconds, taken out, and heat treated at 100°C to obtain a superhydrophobic material with a thickness of 15 microns, a rolling angle of 3 degrees, and a contact angle of 156 degrees. membrane.

Embodiment 3

[0047] Hot piranha is prepared by mixing concentrated sulfuric acid and hydrogen peroxide in a 2:1 ratio. Immerse the clean glass piece in Piranha for activation treatment. After 45 minutes, take out the glass piece, wash it with a large amount of ultrapure water, and dry it with nitrogen gas. With ODTS: DTES molar ratio = 5: 1, the treated glass flakes were coated by immersion coating. After the coated glass sheet is dried in the air for 20 seconds, immersed in ethyl acetate for 5 seconds, taken out, heat treated at 100°C for 3 hours, and left standing in the air for 20 hours, the thickness of the coating is 25 microns, and the rolling angle is 1 degree. , a hydrophobic film with a contact angle of 176 degrees.

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Abstract

The invention discloses super-hydrophobic surface coating material and a preparation method thereof. The super-hydrophobic surface coating material is characterized in that super-hydrophobic poly-alkyl siloxane material in stratiform crystal structure is self-assembled and formed on backing material; the water contact angle of the surface of the super-hydrophobic surface material ranges from 120 degrees to 180 degrees, and the roll angle ranges from 1 degree to 30 degrees. The preparation method comprises the steps of pretreating the backing material; coating solution containing long carbon-chain alkyl silane on the surface of the backing layer by the coating method, thermally treating the coating surface or directly exposing the coating surface to air after treating the surface of the coating with a reagent, and self-assembling and forming the super-hydrophobic poly-alkyl silicone material. The invention adopts the coating method for preparing super-hydrophobic films and overwhelms a plurality of defects of the prior art for preparing super-hydrophobic films with simple modes to manufacture the films.

Description

technical field [0001] The invention relates to a super-hydrophobic surface coating material and a preparation method thereof, and particularly discloses a super-hydrophobic material with a super-hydrophobic structure and function that can be formed on the surface of an organic polymer material, an inorganic material, and a metal by a coating method and its preparation method. technical background [0002] The water wettability of solid surface is one of the very important surface properties. Controlling the wettability of surfaces is critical in many practical applications. The water wettability of a solid surface is reflected in the contact angle (CA) between a water droplet and the flat surface. When the CA of the surface of an object exceeds 150 degrees, this surface is usually called a superhydrophobic surface. Superhydrophobic surfaces are relatively common in nature. The leaves of many plants exhibit strong water repellency, and lotus leaves are a well-known examp...

Claims

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Application Information

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IPC IPC(8): C09D183/04B05D7/24B05D5/08B05D3/00
Inventor 李雪梅何涛柯清平
Owner NANJING UNIV OF TECH
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