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Modification method for super-hydrophobic packing particle for anti-contamination flashover coating and application

An anti-pollution flashover coating and filler particle technology is applied in the field of modification of super-hydrophobic filler particles, which can solve the problems of cumbersome selection process, influence modification effect, harsh conditions, etc. water-based effect

Inactive Publication Date: 2018-03-06
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conditions of hydrolysis reaction of silane coupling agent are generally harsh, difficult to control, and easy to polycondensate to affect its modification effect
And there are many kinds of silane coupling agents, different particles need to choose the appropriate silane coupling agent for modification, the selection process is also relatively cumbersome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Use fluorosilane coupling agent: tridecafluorooctyltriethoxysilane (G617) to modify nano-silica, including the following steps: 1) Weigh a certain amount of nano-silica and add it to an appropriate amount of absolute ethanol , ultrasonic dispersion for 40min;

[0039] 2) According to the mass ratio of tridecafluorooctylethoxysilane to deionized water and absolute ethanol at 1:1:10, an aqueous ethanol solution was prepared, and glacial acetic acid was added dropwise therein to adjust the pH value to 4, and then thirteen Fluoroctylethoxysilane, added in an amount of 20% of the mass of nano-silica, hydrolyzed in an ultrasonic wave for 10 minutes;

[0040] 3) Transfer the nano-silica dispersion in step 1) to an oil bath reflux device, add the tridecafluorooctylethoxysilane hydrolyzate in step 2) to it, set the temperature at 110°C, and stir at a speed of 1000rpm, and react Time 5h.

[0041] 4) The solution after the reaction in step 3) is placed in an oven, baked at 80° C...

Embodiment 2

[0044] Use fluorosilane coupling agent: tridecafluorooctyltriethoxysilane (G617) to modify micron silica (particle size is about 2 microns), including the following steps:

[0045] 1) Weigh a certain amount of micron silicon dioxide and add it to an appropriate amount of absolute ethanol, and ultrasonically disperse for 60 minutes;

[0046] 2) According to the mass ratio of tridecafluorooctylethoxysilane to deionized water and absolute ethanol at 1:1:10, an aqueous ethanol solution was prepared, and glacial acetic acid was added dropwise therein to adjust the pH value to 4, and then thirteen Fluoroctylethoxysilane, added in an amount of 10% of the mass of micron silica, hydrolyzed in an ultrasonic wave for 10 minutes;

[0047] 3) Transfer the micro-silica dispersion in step 1) to an oil bath reflux device, add the tridecafluorooctylethoxysilane hydrolyzate in step 2) to it, set the temperature at 100°C, and stir at a speed of 7000 rpm. Time 6h.

[0048] 4) The solution after t...

Embodiment 3

[0051] Use fluorosilane coupling agent: perfluorodecyltriethoxysilane to modify nano-alumina, including the following steps:

[0052] 1) Weigh a certain amount of nano-alumina and add it to an appropriate amount of absolute ethanol, and ultrasonically disperse for 30-60 minutes;

[0053] 2) Prepare an aqueous ethanol solution according to the mass ratio of perfluorodecyltriethoxysilane to deionized water and absolute ethanol at 1:1:5, add glacial acetic acid dropwise to it to adjust the pH value to 4, and then add perfluorodecyl triethoxysilane to it Decyltriethoxysilane, added in an amount of 15% of the mass of nano-alumina, placed in ultrasonic hydrolysis for 5 minutes;

[0054] 3) Transfer the nano-alumina dispersion in step 1) to an oil bath reflux device, add the perfluorodecyltriethoxysilane hydrolyzate in step 2) to it, set the temperature at 80°C, stir at 500rpm, and the reaction time 6h.

[0055] 4) The solution after the reaction in step 3) is placed in an oven, ba...

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Abstract

The invention discloses a modification method for super-hydrophobic packing particles for an anti-contamination flashover coating and application. The modification method comprises the following steps: 1) preparing a packing particle dispersion; 2) preparing an ethanol dispersion of a fluorinated silane coupling agent, and adjusting the pH value of the ethanol dispersion of the fluorinated silanecoupling agent to 3-5; 3) adding the fluorinated silane coupling agent into the dispersion obtained in the step 2), performing ultrasonic treatment to sufficiently hydrate the fluorinated silane coupling agent so as to obtain a fluorinated silane coupling agent solution for later use; 4) adding the fluorinated silane coupling agent solution prepared in the step 3) into the dispersion with the packing particles prepared in the step 1), and performing a heating stirring reaction to modify the surfaces of the packing particles; 5) drying the modified material, and grinding, thereby obtaining themodified packing particles. According to the modification method, the surfaces of the packing particles for the anti-contamination flashover coating are modified by using the fluorinated silane coupling agent, then the surfaces of the packing particles are hydrophobic but oleophilic, furthermore the hydrophobicity of the coating is improved, and the hydrophobic angle can be up to 150 degrees or larger.

Description

technical field [0001] The invention belongs to the technical field of nano / micro particle surface modification, and in particular relates to a modification method and application of superhydrophobic filler particles used in antifouling flashover coatings. Background technique [0002] The performance of antifouling flashover coatings mainly depends on the function and effect of filler particles. The filler particles are mainly nano- and micron-sized particles with hydrophobic properties and rough surface structures, such as nano- and micron-sized silica particles; photocatalytic nanoparticles, such as nano-sized titanium oxide particles; Nanoparticles with flame retardant effect, such as nano-alumina particles. However, these filler particles often have large specific surface area, high surface activity and poor stability due to their nanometer size, which makes it easy for the nanoparticles to agglomerate with each other. Moreover, a large number of active hydroxyl group...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C1/40C09C3/08C09C3/12C09C1/36C09D7/62
Inventor 米春旭吴亚平李辛庚贾然宗立君郭凯王晓明闫风洁姜波张振岳樊志彬王蝶李文静
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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