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Super-lubricating surface of inorganic oxide and phase separation preparation method of super-lubricating surface

An inorganic oxide, super-lubricating technology, applied in the direction of coating, etc., to achieve the effect of good resistance to external liquid pollution, good resistance to external liquid pollution, simple and efficient preparation method

Inactive Publication Date: 2019-07-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned thin film material prepared by phase separation technology is usually a polymer thin film material, and the technology for preparing an inorganic thin film is rarely reported.

Method used

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  • Super-lubricating surface of inorganic oxide and phase separation preparation method of super-lubricating surface
  • Super-lubricating surface of inorganic oxide and phase separation preparation method of super-lubricating surface
  • Super-lubricating surface of inorganic oxide and phase separation preparation method of super-lubricating surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare 2mL of tetrahydrofuran solution A of 2wt% polymethyl methacrylate; prepare 1mL of tetrahydrofuran solution of 25wt% ethyl orthosilicate, and add hydrochloric acid dropwise until the pH of the precursor solution is 1.5, and catalyze the reaction for 1h to form sol B. Solution A was mixed with sol B, and stirred continuously for another 2 h at room temperature, and the resulting mixture was used for spin coating to form a film. Several 2×2cm transparent glass slides were taken as substrates, and the glass slides were ultrasonically cleaned with lye, absolute ethanol, and deionized water for 5 minutes before being used after natural air drying. Take an appropriate amount of the mixed liquid and drop it on the surface of the glass substrate for spin coating to form a film. The spin coating condition is 1.5krpm, 45s. The coated sample was dried at 100°C for 6 hours. The dried sample was placed in a muffle furnace to raise the temperature to 450° C. at a rate of 1° ...

Embodiment 2

[0031]Prepare 1mL of acetone solution A of 1wt% polyethyl methacrylate; another 1mL of acetone solution of 20wt% methyl orthosilicate, add sulfuric acid dropwise until the pH of the precursor solution is 1, and catalyze the reaction for 1.5h to form sol B. Solution A was mixed with sol B, and stirred continuously for another 2 h at room temperature, and the resulting mixture was used for spin coating to form a film. Several 2×2cm transparent glass slides were taken as substrates, and the glass slides were ultrasonically cleaned with lye, absolute ethanol, and deionized water for 5 minutes before being used after natural air drying. Take an appropriate amount of the mixed liquid and drop it on the surface of the glass substrate for spin coating to form a film. The spin coating condition is 1krpm, 60s. The coated sample was dried at 90°C for 5 hours. The dried sample was placed in a muffle furnace to raise the temperature to 500° C. at a rate of 1.5° C. / min and held for 5 hour...

Embodiment 3

[0034] Configure 3wt% polymethyl methacrylate-co-styrene N,N-dimethylformamide solution A 3mL, wherein the ratio of the two monomers of the copolymer, methyl methacrylate and styrene, is 1:4; Prepare 1mL of 30wt% tetrabutyl titanate N,N-dimethylformamide solution, add phosphoric acid dropwise until the pH of the precursor solution is 1.5, and catalyze the reaction for 2 hours to form sol B. Solution A was mixed with sol B, and stirred continuously for another 2 h at room temperature, and the resulting mixture was used for spin coating to form a film. A number of 2×2 cm glass slides were taken as substrates, and the glass slides were ultrasonically cleaned with lye, absolute ethanol, and deionized water for 5 minutes and then dried naturally for use. Take an appropriate amount of the mixed liquid and drop it on the surface of the glass substrate for spin coating to form a film. The spin coating condition is 2krpm, 30s. The coated samples were dried at 110°C for 5.5 hours. Th...

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Abstract

The invention discloses a super-lubricating surface of an inorganic oxide and a phase separation preparation method of the super-lubricating surface. The preparation method comprises the following steps: (1) preparing an organic solution A of a polymer; dissolving a precursor of the inorganic oxide in an organic solvent, adding a catalyst to carry out catalyze hydrolysis on the precursor of the inorganic oxide to form sol B, uniformly mixing the organic solution A with the sol B, and then coating the surface of transparent glass; (2) carrying out low-temperature drying to obtain a mambrane, and then carrying out high-temperature treatment on the membrane to obtain an inorganic oxide porous membrane; and (3) placing the inorganic oxide porous membrane into a surface modification solution for hydrophobic treatment, carrying out drying, immersing the hydrophobized membrane into a lubricating solution, and finally, obliquely placing the membrane to remove the redundant lubricating solutionon the surface of the membrane to obtain the super-lubricating surface. The sliding angles of various liquids on the super-lubricating surface are smaller than 2 degrees, and the visible light transmittance can reach 90%. The super-lubricating surface has very good resistance to external liquid pollution and can be applied to materials with transparency requirements.

Description

technical field [0001] The invention relates to the field of preparation of super-lubricating surfaces of inorganic oxides, in particular to a super-lubricating surface of inorganic oxides and a phase separation preparation method thereof. Background technique [0002] The concept of super-lubricating surface was first proposed by the Aizenberg research group of Harvard University [J.Aizenberg, etal.Nature, 2011, 477, (7365): 443-447, patent CN 103703085B], the main principle is to use lubricating fluid to replace the substrate The surface is in contact with the external liquid, changing the solid-solid interface into a liquid-liquid interface so that it is difficult for the external liquid to adhere to its surface. The preparation process of the super-lubricating surface is to build a porous structure on the surface of the solid substrate, and then pour a lubricating liquid that is immiscible with the external liquid. It is usually necessary to hydrophobize the surface aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/42
CPCC03C17/42C03C2217/70
Inventor 符小艺陶源
Owner SOUTH CHINA UNIV OF TECH
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