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A kind of preparation method of surface-modified silicon carbide based on oil-based grinding and polishing liquid

A technology of surface modification and surface modifier, applied in polishing compositions containing abrasives, chemical instruments and methods, dyed organic silicon compound treatment, etc., can solve the problem of material surface removal rate decline, shortening the service life of abrasive tools, Hinder the transportation of polishing products and other problems, and achieve the effects of reducing particle agglomeration, enhancing surface hydrophobicity, and improving lipophilicity and hydrophobicity

Inactive Publication Date: 2017-10-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the suspension of the precision grinding and polishing fluid cannot be well resolved, the micropores inside the abrasive tool will be filled with abrasives or debris from the polishing process during the grinding and polishing process.
This will not only hinder the transportation of polishing products, reduce the surface removal rate of materials, but also affect the normal use of abrasive tools and shorten the service life of abrasive tools

Method used

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  • A kind of preparation method of surface-modified silicon carbide based on oil-based grinding and polishing liquid
  • A kind of preparation method of surface-modified silicon carbide based on oil-based grinding and polishing liquid
  • A kind of preparation method of surface-modified silicon carbide based on oil-based grinding and polishing liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Mix ammonia solution with a concentration of 5wt% and silicon carbide micropowder, ultrasonically clean for 30 minutes, stir continuously for 3 hours, filter with suction, and wash repeatedly with deionized water until neutral, and place the silicon carbide obtained by suction filtration in an oven at 100°C , dried for 24 hours, ground and set aside;

[0036] 2. Measure 50 ml of ethanol and 10 ml of deionized water, mix well, weigh 2 g of aminopropyltriethoxysilane (KH550), add it to the alcohol-water mixture, and stir with a magnetic stirrer at room temperature 30min;

[0037] 3. Transfer the solution obtained in step 2 to a three-necked flask, reflux in a water bath, raise the temperature to 90°C, add 9 grams of silicon carbide micropowder, and condense and reflux at this temperature for 4 hours;

[0038] 4. After the reaction, filter with suction and rinse with absolute ethanol for at least 3 times to eliminate the physical adsorption of aminopropyltriethoxysilan...

Embodiment 2

[0044] 1. Mix ammonia solution with a concentration of 15wt% and silicon carbide micropowder, ultrasonically clean for 30 minutes, stir continuously for 2 hours, filter with suction, and wash repeatedly with deionized water until neutral, and place the silicon carbide obtained by suction filtration in an oven at 100°C , dried for 24 hours, ground and set aside;

[0045] 2. Measure 30 ml of ethanol and 10 ml of deionized water, mix well, weigh 0.5 g of mercaptopropyltrimethoxysilane, add it to the alcohol-water mixture, and stir with a magnetic stirrer for 30 minutes at room temperature;

[0046] 3. Transfer the solution obtained in step 2 to a three-necked flask, reflux in a water bath, raise the temperature to 90°C, add 2 grams of silicon carbide micropowder, and condense and reflux at this temperature for 5 hours;

[0047] 4. After the reaction, filter with suction and rinse with absolute ethanol at least 3 times to eliminate the physical adsorption of mercaptopropyltrimetho...

Embodiment 3

[0053] 1. Mix hydrochloric acid solution with a concentration of 5wt% and silicon carbide micropowder, ultrasonically clean for 30 minutes, stir continuously for 2.5 hours, filter with suction, and wash repeatedly with deionized water until neutral, and place the silicon carbide obtained by suction filtration in an oven at 100°C medium, dry for 24 hours, grind, and set aside;

[0054] 2. Measure 27 ml of ethanol and 13 ml of deionized water, mix well, weigh 0.5 g of diethylenetriaminopropyltrimethoxysilane, add it to the alcohol-water mixture, and stir for 30 minutes at room temperature with a magnetic stirrer ;

[0055] 3. Transfer the solution obtained in step 2 to a three-necked flask, reflux in a water bath, raise the temperature to 90°C, add 7.6 g of silicon carbide micropowder, and condense and reflux at this temperature for 5 hours;

[0056] 4. After the reaction, filter with suction and rinse with absolute ethanol at least 3 times to eliminate the physical adsorption ...

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Abstract

The invention discloses a preparing method for surface modified silicon carbide based on an oil-based grinding and polishing agent.The preparing method includes the steps that silicon carbide is pretreated through acid pickling or alkali cleaning, surface impurities of micro powder are removed, and surface reaction activity is enhanced; a silane coupling agent is used for modifying silicon carbide particles preliminarily to improve surface hydrophobicity, and then halohydrocarbon is used for modifying the preliminary modified particles secondarily.By means of the surface hydrophobic modification technology, oleophylic hydrophobicity of the surface of the silicon carbide micro powder is effectively improved, the micro powder is dispersed in an oil-based medium better, particle aggregation is reduced, and oil-based silicon carbide suspension liquid high in suspension performance is prepared.

Description

technical field [0001] The invention relates to silicon carbide, in particular to a surface-modified silicon carbide based on oil-based grinding and polishing fluid and a preparation method thereof. Background technique [0002] As a grinding technology, grinding or polishing plays an important role in the mechanical field, especially in precision instrument processing. During the precision grinding and polishing operation, the grinding and polishing liquid is injected between the workpiece and the grinding tool by smearing or spraying. With the relative movement of the workpiece and the mold, the burrs and corners on the surface of the workpiece will also be affected by the grinding and polishing liquid. The irregular movement of abrasive particles breaks into fine fragments, and with the flow of grinding and polishing fluid, the fine fragments will be taken away together. Repeat this operation to gradually form a smooth and precise plane on the surface of the workpiece. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/28C09C3/08C09C3/12C09G1/02
CPCC01P2006/22C09C1/28C09C3/006C09G1/02
Inventor 朱玉梅商旭静李春雪李志宏
Owner TIANJIN UNIV
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