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Nano SiO2 microsphere, water-repelling agent, preparation methods of nano SiO2 microsphere and water-repelling agent, and water-repelling glass

A water repellent, microsphere technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of low contact angle, complex process, poor durability, etc., and achieve low cost and process. Simple, safety-enhancing effect

Active Publication Date: 2014-11-05
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] To sum up, there are the following technical problems in the prior art: the current commercially available automotive glass water repellent has problems such as poor durability and low contact angle during application. operation, complex process

Method used

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  • Nano SiO2 microsphere, water-repelling agent, preparation methods of nano SiO2 microsphere and water-repelling agent, and water-repelling glass
  • Nano SiO2 microsphere, water-repelling agent, preparation methods of nano SiO2 microsphere and water-repelling agent, and water-repelling glass
  • Nano SiO2 microsphere, water-repelling agent, preparation methods of nano SiO2 microsphere and water-repelling agent, and water-repelling glass

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preparation example Construction

[0056] A kind of nano-SiO 2 Microsphere preparation method, comprising the following steps:

[0057](1) Ethyl orthosilicate is dispersed in aqueous alcohol solution to form solution A, wherein the mass ratio of water is 1.8% to 2.0%, the mass ratio of ethyl orthosilicate is 0.4% to 2.6%, and the balance is Alcohol; the water is deionized water or distilled water; the alcohol is one of ethanol, n-propanol, isopropanol, n-butanol and other alcoholic solvents or a mixture of several of them.

[0058] (2) Add concentrated ammonia water to alcohol to form alcoholic ammonia solution B, and NH in the alcoholic ammonia solution B 3 The mass percentage content is 3.1%-7.2%, and the balance is alcohol solvent; the alcohol is one of alcohol solvents such as ethanol, n-propanol, isopropanol, n-butanol, or a mixture of several of them.

[0059] (3) At room temperature, add solution B to solution A at a rate of 20-45 μl / min, stir while adding solution B to solution A, the stirring speed i...

Embodiment 1

[0071] Preferred Embodiment 1: This embodiment provides a nano-SiO 2 The preparation method of microsphere, hydrophobic modifier and hydrophobic glass comprises the following steps:

[0072] (1) Ethyl orthosilicate is dispersed in ethanol / distilled water to obtain solution A, wherein the mass percentage content of ethyl orthosilicate is 1.88%, the mass percentage content of distilled water is 2.53%, and the balance is ethanol; concentrated ammonia water is added to ethanol , get NH 3 Solution B with a mass percent content of 6.60%; add solution B to solution A at a rate of 20 μl / min, and stir at 1000 rpm at the same time. After all solution B is added to solution A, continue to stir for 30 minutes, and then leave it open 72h to get solution C, SiO in solution C 2 The particle size of the microspheres is about 75nm.

[0073] (2) Mix hydrochloric acid and distilled water in a ratio of 1:1 to obtain solution D; Mix with ethanol to obtain a perfluoroalkylsilane / alcohol mixed ...

Embodiment 2

[0076] Preferred embodiment two: this embodiment provides a nano-SiO 2 The preparation method of microsphere, hydrophobic modifier and hydrophobic glass comprises the following steps:

[0077] (1) Ethyl orthosilicate is dispersed in ethanol / distilled water to obtain solution A, wherein the mass percentage content of ethyl orthosilicate is 1.90%, the mass percentage content of distilled water is 1.63%, and the balance is ethanol; concentrated ammonia water is added to ethanol , get NH 3 Solution B with a mass percentage content of 5.55%; add solution B to solution A at a speed of 25 μl / min, and stir at 800 rpm at the same time. After all solution B is added to solution A, continue to stir for 60 minutes, and then leave it open 72h to get solution C, SiO in solution C 2 The particle size of the microspheres is about 63nm.

[0078] (2) Mix hydrochloric acid and distilled water in a ratio of 1:1 to obtain solution D; Mix with ethanol to obtain a perfluoroalkylsilane / ethanol m...

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Abstract

The invention relates to a nano SiO2 microsphere, a water-repelling agent, preparation methods of the nano SiO2 microspheres and the water-repelling agent, and water-repelling glass. High-activity microspheres within a certain particle size range are formed by use of a two-step method of base catalyzed silicate hydrolysis and acid activation; appropriate perfluoroalkyl-containing silane hydrolysate is added to a sol containing the SiO2 microspheres, the surface of the SiO2 microspheres is modified by the perfluoroalkyl-containing silane by use of stirring and mixing for certain time, and then the water-repelling agent is formed; the water-repelling agent is applied to the surface of a pretreated glass substrate so that a water-repelling film having relatively high hydrophobicity and durability can be formed. The nano SiO2 microsphere and the water-repelling agent are simple in process, low in cost, remarkable in effect and capable of improving the view clarity of drivers and passengers in overcast and rain weather and improving the safety if being applied to the automobile glass.

Description

technical field [0001] The present invention relates to nanometer SiO 2 The technical field of preparation of microspheres, water-repellent agents, and water-repellent glass, specifically relating to a nano-SiO 2 Microspheres, water-repellent agents, methods for their preparation, and water-repellent glasses. Background technique [0002] Vehicles driving in rainy days affect the driver's vision due to the rainwater spreading on the surface of the side windows and the front windshield glass, which often leads to accidents. Modification of low surface energy substances on the glass surface can obtain a film layer with a hydrophobic effect. The rainwater can shrink into a spherical shape on the surface, slide down by itself under the action of its own weight or fly away from the glass surface under the action of the wind and take away the dust on the glass surface. , can improve the clarity of the driver's field of vision; in addition, in snow and frost weather, the frost la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12C03C17/23B82Y30/00
Inventor 陈大华熊建民洪丽秦玉林徐蕤
Owner CHERY AUTOMOBILE CO LTD
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