Method for preparing super-oleophobic surface by taking kaolin as raw material

A superoleophobic and kaolin technology, applied in metal material coating process, coating, solid-state chemical plating and other directions, can solve the problems of long experimental period and complicated experimental equipment, and achieve short experimental period, simple preparation method, and low cost. Effect of contact area

Inactive Publication Date: 2015-11-04
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The advantage of this method is that the obtained super-oleophobic material has good wear resistance, but the disadvantage is that the experimental period is long and the experimental equipment is complicated.

Method used

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  • Method for preparing super-oleophobic surface by taking kaolin as raw material
  • Method for preparing super-oleophobic surface by taking kaolin as raw material
  • Method for preparing super-oleophobic surface by taking kaolin as raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The preparation method of the present embodiment comprises the following steps:

[0030] Step 1. Add 0.3g of sodium hydroxide, 3g of perfluorooctanoic acid and 72mL of distilled water into a round bottom flask, stir at room temperature until the sodium hydroxide and perfluorooctanoic acid are completely dissolved to obtain a mixed solution, and then add 30g of kaolin powder to the mixed solution (Chemical pure reagent), ultrasonically dispersed at room temperature for 20 minutes;

[0031] Step 2. Heat the mixed solution dispersed by ultrasonic in Step 1 in an oil bath to 50° C. under stirring condition, and then keep it warm for 1 hour to obtain a suspension;

[0032] Step 3. Apply the suspension described in step 2 evenly on the substrate (glass slide), then dry the substrate coated with the suspension for 30 minutes at room temperature, and then place the dried substrate in a dry place. In the box, dry at 120°C for 2 hours, and finally wipe the dried surface of the s...

Embodiment 2

[0036] The preparation method of the present embodiment comprises the following steps:

[0037] Step 1. Add 0.15g of sodium hydroxide, 0.75g of perfluorooctanoic acid and 30mL of absolute ethanol into a round bottom flask, stir at room temperature until the sodium hydroxide and perfluorooctanoic acid are completely dissolved to obtain a mixed solution, and then add 15g of kaolin powder (chemically pure reagent), ultrasonically dispersed for 30min at room temperature;

[0038] Step 2: Heat the ultrasonically dispersed mixed solution in Step 1 in an oil bath to 60°C under stirring conditions, and then keep it warm for 1 hour to obtain a suspension;

[0039] Step 3. Apply the suspension described in step 2 evenly on the substrate (glass slide), then dry the substrate coated with the suspension for 40 minutes at room temperature, and then place the dried substrate in a dry place. In the box, dry at 100°C for 2 hours, and finally wipe the dried surface of the substrate (it can be ...

Embodiment 3

[0042] The preparation method of the present embodiment comprises the following steps:

[0043] Step 1. Add 0.15g of sodium hydroxide, 0.75g of perfluorooctanoic acid and 15mL of absolute ethanol into a round bottom flask, stir at room temperature until the sodium hydroxide and perfluorooctanoic acid are completely dissolved to obtain a mixed solution, and then add 5g kaolin powder (chemically pure reagent), ultrasonically dispersed at room temperature for 10min;

[0044] Step 2. Under stirring conditions, heat the mixed solution dispersed by ultrasonic in Step 1 in an oil bath to 55° C. and keep it warm for 1.5 hours to obtain a suspension;

[0045] Step 3, apply the suspension described in step 2 evenly on the substrate (aluminum alloy metal sheet), then dry the substrate coated with the suspension for 20 minutes at room temperature, then place the dried substrate on In a drying oven, dry at 110° C. for 1.5 h, and finally wipe the dried surface of the substrate (it can be w...

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Abstract

The invention discloses a method for preparing a super-oleophobic surface by taking kaolin as a raw material. The method comprises the following steps: I, dissolving sodium hydroxide and perfluoro caprylic acid into a solvent to obtain a mixed solution, then, adding kaolin powder into the mixed solution, and ultrasonically dispersing the newly obtained mixed solution at the room temperature; II, carrying out oil-bath heating on the ultrasonically-dispersed mixed solution under a stirring condition, and then, preserving the temperature of the mixed solution to obtain a turbid liquid; and III, uniformly coating a substrate with the turbid liquid, then, drying the substrate which is coated with the turbid liquid under the room temperature condition, putting the dried substrate in a drying oven to dry, and finally wiping the dried substrate surface, thereby obtaining the super-oleophobic surface on the substrate. According to the method, clay mineral kaolin powder with low cost is directly used as a base raw material, so that the super-oleophobic surface can be obtained by virtue of simple operation steps and gentle reaction conditions; and the super-oleophobic surface has the advantage of being not limited by the substrate, and the industrial application of kaolin is expanded.

Description

technical field [0001] The invention belongs to the technical field of oleophobic surface preparation, and in particular relates to a method for preparing a super oleophobic surface by using kaolin as a raw material. Background technique [0002] Kaolin is a low-cost clay mineral and an important industrial raw material. my country has abundant reserves of kaolin and its price is low. Therefore, strengthening the research and development and preparation of kaolin super-oleophobic materials can expand the application range of kaolin and reduce the preparation cost of super-oleophobic surfaces. . [0003] Common preparation methods for superoleophobic surfaces include: [0004] 1) Etch metals such as aluminum and copper by hot alkali solution, and obtain a micro-nano multi-level structure on the surface, and then modify the surface with perfluorosilane substances to reduce the surface energy, and obtain a super-oleophobic surface. [0005] The advantage of this type of method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C20/08
Inventor 屈孟男何金梅冯娟刘姗姗姚亚丽
Owner XIAN UNIV OF SCI & TECH
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