Hydrophobic micro-size powder and its preparation

An ultra-fine powder and hydrophobic technology, which is applied in the treatment of dyed organosilicon compounds, etc., can solve the problems affecting mechanical properties, tensile strength, wear resistance, weak combination of hydrophobic groups and powder, and affecting the hydrophobicity of materials and products and other problems, to achieve the effect of obvious hydrophobic effect, transparent dispersion and improved strength

Inactive Publication Date: 2003-04-02
舟山明日纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large particle size of the hydrophobic ultrafine powder used in the prior art, generally above 1 μm and difficult to disperse in the material, adding them to the material will not only reduce the transparency of the material and the products made of these materials , and will affect some mechanical properties (such as tensile strength, wear resistance, etc.) On the body, the combination of the hydrophobic group and the powder is not strong, and the hydrophobic group will be destroyed with the extension of the use time and when the use temperature exceeds 100 ° C, thus affecting the hydrophobicity of materials and products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0012] Example 2: First, add 100g of nano-silica powder to 800ml of toluene, then stir at room temperature to make it evenly mixed, and slowly add 30g of high-concentration silane-based surface treatment agent of KH560 dropwise to the mixture During the process, ultrasonic dispersion is used while adding dropwise. After the dropwise addition is completed, continue ultrasonication for about 15 minutes to complete the reaction. Then remove the toluene from it to obtain the reactant of nano-silicon oxide and silane surface treatment agent KH560, wash and dry in an oven at a drying temperature of 120°C. Finally, it is dispersed by a jet mill to obtain white powdery superhydrophobic nano-silicon oxide powder (this powder is a soft aggregate of super-hydrophobic nano-silicon oxide powder, so it appears white).

Embodiment 3

[0013] Embodiment 3: Firstly, 100 g of composite powder of nano-silicon oxide and nano-titanium oxide was added into 800 ml of xylene, and then stirred at room temperature to make it evenly mixed. Then slowly add 8g of high-concentration SG-Si900 silane surface treatment agent to the mixture, and disperse it with ultrasonic waves while adding it dropwise. After the dropwise addition, continue ultrasonic dispersing for about 10 minutes to complete the reaction. Then remove xylene from it to obtain the reactant of composite powder of nano-silicon oxide and nano-titanium oxide and silane surface treatment agent SG-Si900. After washing, dry it in an oven at a drying temperature of 150°C. Finally, it is dispersed by a jet mill to obtain a white powdery superhydrophobic nano silicon oxide and titanium oxide composite powder.

Embodiment 4

[0014] Example 4: First, 100g of nano-titanium oxide powder was added to 600ml of toluene, then stirred at room temperature to make it evenly mixed, and 20g of high-concentration silane surface treatment agent of A-189 was slowly added dropwise to the In the mixed solution, disperse with ultrasonic waves while adding dropwise. After adding the surface treatment agent dropwise, continue ultrasonication for about 15 minutes to complete the reaction. Then remove the toluene therefrom to obtain the reaction product of nano-titanium oxide and surface treatment agent A-189, wash and dry in an oven at a drying temperature of 120°C. Finally, it is dispersed by a jet mill to obtain superhydrophobic nano-titanium oxide powder in the form of white powder.

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PUM

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Abstract

A hydrophobic superfine powder has an original diameter of 5-100 nm, a soft conglomeration diameter less than 300 nm and the hydrophobic groups wrapping on the surface of particle by chemical bonds. It is prepared through dispersing the nano particles in medium, adding silane surfactant, reacting, removing the dispersing meidum and drying. Its advanrtages are high transparency and mechanical strength, and firm combination between hydrophobic group and particle.

Description

technical field [0001] The invention relates to a hydrophobic superfine powder and a preparation method thereof. The hydrophobic superfine powder is added to materials to improve the hydrophobicity of the materials. Background technique [0002] Materials with waterproof requirements and waterproof and water-proof products made of these materials use their hydrophobic properties to limit water penetration to achieve the purpose of covering, wrapping, and dressing. In some occasions, the level of hydrophobicity of materials directly affects the use effect of these materials and products. In order to improve the hydrophobicity of these materials and products, the current solution is to add ultrafine powder with hydrophobic groups, that is, hydrophobic ultrafine powder, to these materials. Due to the large particle size of the hydrophobic ultrafine powder used in the prior art, generally above 1 μm and difficult to disperse in the material, adding them to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/12
Inventor 方燕刘景春饶大杭黄海
Owner 舟山明日纳米材料有限公司
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