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Lyophobic and oleophylic micro nano-coatings applied to of oil filtering dehydration and preparation method thereof

A filtration dehydration, micro-nano technology, applied in the direction of mechanical dehydration/demulsification, filtration separation, separation method, etc., can solve the problems of thick coating, easy to block mesh, poor lipophilicity, etc., and achieve the distribution of coating film. Uniform, good hydrophobic effect and wide applicability

Inactive Publication Date: 2009-12-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the disadvantages of poor lipophilicity, thicker coating and easy blockage of mesh holes in the prior art, and provide a kind of non-expensive raw materials such as fluorine materials, environmental protection, coating and substrate It has good adhesion, does not block the mesh, and has good hydrophobicity (static contact angle with water>140°, rolling angle<20°), lipophilicity (static contact angle with kerosene and hydraulic oil is 0°) properties Hydrophobic and lipophilic micro-nano coatings for oil filtration and dehydration

Method used

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  • Lyophobic and oleophylic micro nano-coatings applied to of oil filtering dehydration and preparation method thereof
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  • Lyophobic and oleophylic micro nano-coatings applied to of oil filtering dehydration and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] A method for preparing a hydrophobic and lipophilic micro-nano coating for oil filtration and dehydration: comprising the following steps:

[0035] The first step is to immerse the 300-mesh stainless steel braided mesh in petroleum ether, ultrasonically clean it for 20 minutes, and put it into the mixed solution of hydrochloric acid, sulfuric acid, ethanol, hexamethylenetetramine, hydrogen peroxide and water after drying, among them, hydrochloric acid, sulfuric acid, The mass ratio of ethanol, hexamethylenetetramine, hydrogen peroxide and water is 300:220:120:2:250:150; soak at room temperature for 5 minutes to remove rust, make the surface of the stainless steel mesh smooth, and then wash it with a large amount of distilled water until neutral , and finally dried at 60°C for later use;

[0036] In the second step, in parts by weight, add 6 parts of methyl orthosilicate, 6 parts of ammonia water, 12 parts of water and 100 parts of ethanol in the reaction vessel, and rea...

Embodiment 2

[0042] A method for preparing a hydrophobic and lipophilic micro-nano coating for oil filtration and dehydration: comprising the following steps:

[0043] The first step is to immerse the 50-mesh copper net in gasoline, ultrasonically clean it for 20 minutes, put it into the mixed solution of sulfuric acid, nitric acid and sodium chloride after drying, and the mass ratio of sulfuric acid, nitric acid and sodium chloride is 700:300:4 ; Soak at 40°C for 10 minutes to remove rust, make the surface of the copper mesh smooth, then wash with a large amount of distilled water until neutral, and finally dry at 60°C for later use;

[0044] In the second step, 10 parts of tetraethyl orthosilicate, 8 parts of ammonia water, 0 parts of water, and 50 parts of methanol were added to the reaction vessel in parts by weight, and reacted at 30°C for 0.5h to obtain 500nm monodisperse silica Sol;

[0045] In the third step, add 1 part of dodecyltrimethoxysilane to the reaction vessel described i...

Embodiment 3

[0048] A method for preparing a hydrophobic and lipophilic micro-nano coating for oil filtration and dehydration: comprising the following steps:

[0049] The first step is to immerse the 1800-mesh iron net in the mixed solvent of methanol and acetone, ultrasonically clean it for 20 minutes, put it into the mixed solution of phosphoric acid and chromic acid after drying, and the mass ratio of phosphoric acid and chromic acid is 8.5:15. Soak in ℃ for 2 minutes to remove rust, make the surface of steel mesh smooth, then wash with a large amount of distilled water until neutral, and finally dry at 60 ℃ for later use;

[0050] In the second step, in parts by weight, add 4 parts of ethyl orthosilicate, 2 parts of ammonia water, 18 parts of water, 200 parts of propanol in the reaction vessel, and react at 70°C for 1 hour to obtain a 90nm monodisperse silica sol ;

[0051] In the third step, add 3 parts of isobutyltriethoxysilane to the reaction vessel described in the second step, ...

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Abstract

The invention discloses Lyophobic and oleophylic micro nano-coatings applied to oil filtering dehydration and a preparation method thereof. Base material of the coatings is metal mesh grid with 50-1800 meshes, the surface of the metal mesh grid is coated with a layer of dense micro nano-coating which is dense thin film composed of nano silica global particles with partical size ranging from 90nm to 500nm.In the method of the invention, the sol-gel method is adopted, tetraethyl ester serves as the precursor, ammonia water serves as the catalyst, ethanol serves as the solvent, alkyl oxosilane serves as lyophobic modifier, the method of hydrolytie polycondensation is adopted to obtain lyophobic nano silica sol, the process of impregnation or spraying is adopted to coat the gel on the metal mesh grid with 50-1800 meshes, after thermal treatment, oil-water separation net with lyophobic and oleophylic properties is obtained. The method of the invention features simple process, no harm to the environment, no need of fluorine material, wide application to coalescing separator as a separation filter element and the function of filtration and dehydration of oil.

Description

technical field [0001] The invention relates to a hydrophobic and lipophilic micro-nano coating for oil filtration and dehydration and a preparation method thereof. It belongs to the technical fields of chemical engineering and functional materials. Background technique [0002] Moisture in aviation kerosene, hydraulic oil, gasoline and other oils will accelerate oil deterioration, or corrode equipment components, and even cause system failure, directly affecting the life of the engine and even the safety of aircraft and automobiles. The oil-water separator is made of a separation filter element coated with hydrophobic and lipophilic materials. When the oil passes through, the difference in contact characteristics between the surface of the material and the surface of the oil and water can be used to intercept the tiny water droplets and effectively remove the oil in the oil. Trace moisture. The key technology of the separation filter element of the oil-water separator lie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022B01D39/12C10G33/06
Inventor 皮丕辉杨浩黄二梅文秀芳郑大锋梁云胡健程江杨卓如
Owner SOUTH CHINA UNIV OF TECH
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