Preparation method of (SiC)

super-hydrophobic membrane layer with lotus leaf effect

A lotus leaf effect and super-hydrophobic technology, which is applied in coatings, metal material coating processes, liquid chemical plating, etc., can solve the problems of few reports on super-hydrophobic film preparation methods, small particle size of silicon carbide powder, and large specific surface area. problems, to achieve good superhydrophobicity, good hydrophobicity, and simple operation

Active Publication Date: 2021-06-11
HEILONGJIANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the above-mentioned preparation methods require the use of organic solvents, the preparation cost is relatively high, or they are not environmentally friendly, or the process is complicated, or they have high requirements for raw materials and equipment.
[0003] Silicon carbide particles [abbreviated as (SiC) P ] has the ad

Method used

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  • Preparation method of (SiC)<p> super-hydrophobic membrane layer with lotus leaf effect
  • Preparation method of (SiC)<p> super-hydrophobic membrane layer with lotus leaf effect
  • Preparation method of (SiC)<p> super-hydrophobic membrane layer with lotus leaf effect

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] Step 1, (SIC) P Treatment

[0037] (SiC) P In the resistance furnace, heated to 1200 ° C, and the oxidative etch treatment was carried out for 2 hours. 5 g of the sample after oxidizing etching was taken to the 200 mL volume ratio of HF, HCl, distilled water mixed solution of 1: 1: 10, and hydrophilic treatment was carried out at room temperature for 20 minutes; then the hydrophilic treatment (SiC) P Add to 200ml 1.0mol·L -1 TiCl 3 , 1.5 g · L -1 PDCL 2 In HCl mixed solution, activation treatment for 30 minutes at room temperature;

[0038] Step II, depositing formulation

[0039] Celebrate 60g · L -1 , Sodium molybdate 15g · L -1 , Sodium pyrophosphate 15g · L -1 , Boric acid 8g · L -1 , Rare earth 2.4mg · L -1 , Sodium secondary phosphate 24g · L -1 , Stabilizer 0.3 mg • L -1 , Dissolved in distilled water into a 1L solution, and the pH is adjacent to a pH of 7.5;

[0040] Step three, preparation of superhydrophobic film

[0041] Will processed (SiC) P ...

Example Embodiment

[0048] Example 2

[0049] Step 1, (SIC) P Treatment

[0050] (SiC) P In the resistance furnace, heated to 1000 ° C, and the oxidative etch treatment was carried out for 3 hours. The sample was taken 7 g after oxidation etching, and the hydrophilic treatment was carried out in a hydrophilic treatment in HF, HCl, distilled water mixed solution of 1: 1: 1: 1: 12, and hydrophilic treatment was performed at room temperature; and then the hydrophilic (SiC) P Add 300ml 0.8 Mol·L -1 TiCl 3 1.0 g · L - 1 PDCL 2 In HCl mixed solution, activation treatment was 35 minutes at room temperature;

[0051] Step II, depositing formulation

[0052] Celebrate 70g · L -1 , Sodium molybdate 18g · L -1 , Sodium pyrophosphate 16g · L -1 6g · l -1 , Rare earth 2.6mg · L -1 , Sodium secondary phosphate 26g · L -1 , Stabilizer 0.5 mg · L -1 , Dissolved in distilled water into a 1L solution, and the pH is 8.0 with ammonia water.

[0053] Step three, preparation of superhydrophobic film

[0054] Will process...

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Abstract

The invention relates to a preparation method of a (SiC)

super-hydrophobic membrane layer with a lotus leaf effect, and belongs to the technical field of material surface modification. A micro-nano structure is constructed and the preparation of the (SiC)

super-hydrophobic membrane layer is realized by adopting a simple chemical deposition method under the conditions of normal pressure and normal temperature. The preparation process comprises the steps of (SiC)

pretreatment, (SiC)

surface chemical deposition modification and long-time standing of the modified (SiC)

. The static water contact angle of the prepared membrane layer is 150-160 degrees, the rolling angle is less than 10 degrees, and the prepared membrane layer shows good super-hydrophobicity at 10-80 DEG C. According to the preparation method of the (SiC)

super-hydrophobic membrane layer with the lotus leaf effect, the used (SiC)

is a waste material generated in an industrial production process, has low requirements on raw materials, is beneficial to resource reutilization, has the advantages of simplicity in operation, environmental friendliness, low equipment requirements, good hydrophobic effect and the like at the same time, and is convenient to popularize; and super-hydrophobic silicon carbide particles can be widely applied to the fields of self-cleaning, anti-icing, anti-fog, anti-fouling and the like by combining the excellent properties of wear resistance, corrosion resistance and the like of the super-hydrophobic silicon carbide particles.

Description

technical field [0001] The invention relates to the technical field of preparation and surface modification of inorganic powder materials, in particular to a method for preparing a silicon carbide superhydrophobic film layer with lotus leaf effect. Background technique [0002] Due to the limited contact area between the superhydrophobic surface and water, the chemical reaction and chemical bonding with water are inhibited, so it has the advantages of anti-pollution, self-cleaning, anti-ice and snow, anti-oxidation, and anti-corrosion. In nature, the leaves of many plants and certain parts of animals have superhydrophobic properties, such as lotus leaves, dragonfly wings, and mosquito compound eyes. The lotus leaf is the first plant to be found to be super-hydrophobic. Studies have found that the super-hydrophobic surface in nature has a micro-nano structure similar to the surface of the lotus leaf, which is called the "lotus leaf effect". The wettability of a solid surface...

Claims

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Application Information

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IPC IPC(8): C23C18/18C23C18/36
CPCC23C18/1639C23C18/1893C23C18/36C23C18/1689
Inventor 宿辉
Owner HEILONGJIANG INST OF TECH
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