Multifunctional fluorine-containing microsphere as well as preparation method and application thereof

A multifunctional, microsphere technology, applied in water repellent addition, coating, iron oxide/iron hydroxide, etc., can solve the problems of poor washing resistance, complex process, high price, etc., and achieve good water dispersion. high performance, simple preparation method and good corrosion resistance

Active Publication Date: 2014-03-26
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fluorine-containing part on the surface is a thin monomolecular layer, so it is easy to be polluted or damaged
[0005] Patent 201110266897.9 proposes a method of blending fluorine-containing silicon-containing copolymers and silicon dioxide to assemble a film on the surface containing active groups, which can endow the surface with good super-amphiphobic properties. This method is widely used Fluorine-containing silicon-containing copolymers, and blending and assembly reactions are required during use, and the process is relatively complicated
[0006] Patent 201110373304.9 proposes to use atom transfer radical polymerization to graft cross-linkable monomers and fluorine-containing monomers on the surface of amino-modified inorganic microspheres to obtain cross-linkable super-amphiphobic microspheres, which are assembled into films Obtaining

Method used

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  • Multifunctional fluorine-containing microsphere as well as preparation method and application thereof
  • Multifunctional fluorine-containing microsphere as well as preparation method and application thereof
  • Multifunctional fluorine-containing microsphere as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0061] (1) Preparation of silica microspheres: Add 100ml of absolute ethanol and 3mL of ammonia water to a 250mL round-bottomed flask, then add 4mL of tetraethyl orthosilicate dropwise, react at 35°C for 24h, and wash the product with absolute ethanol After centrifuging and washing for three times, the obtained silica microspheres were subjected to freeze-vacuum drying, and the finally obtained silica microspheres had a particle size of 50±5nm.

[0062] (2) Synthesis of silica microspheres modified with mercaptosilane coupling agent: Add silica microspheres in anhydrous toluene, ultrasonically disperse for 30 minutes (ultrasonic power is 300W, temperature is 35°C), and then add silane Coupling agent, nitrogen deoxygenation for 40min, stirring reaction at room temperature for 24h, the reaction products were successively washed with acetone, toluene, and ethanol, and then vacuum-dried at room temperature for 24h to obtain modified silica microspheres, in which silica microspheres...

Embodiment 2

[0076] (1) Preparation of silica microspheres: Add 100ml of absolute ethanol and 5mL of ammonia water into a 250mL round-bottomed flask, then add 7mL of tetraethyl orthosilicate dropwise, react at 35°C for 24h, and wash the product with absolute ethanol After centrifuging and washing three times, the obtained silica microspheres were lyophilized and vacuum-dried, and the final particle size of the obtained silica microspheres was 110±5nm;

[0077] (2) Synthesis of silica microspheres modified with mercaptosilane coupling agent: In anhydrous toluene, add the silica microspheres prepared in step (1), and disperse them ultrasonically for 30 minutes (ultrasonic power is 300W, temperature is 35 ℃), then add a silane coupling agent, pass nitrogen gas to remove oxygen for 40 minutes, and stir at room temperature for 30 hours. The product is washed with acetone, toluene, and ethanol for several times, and then vacuum-dried at room temperature for 24 hours to obtain modified silica micr...

Embodiment 3

[0090] (1) Preparation of silica microspheres: Add 100ml of absolute ethanol and 7mL of ammonia water into a 250mL round bottom flask, then add 10mL of tetraethyl orthosilicate dropwise, react at 35°C for 24h, and then wash the product with absolute ethanol After centrifuging and washing for three times, the obtained silica microspheres were subjected to freeze-vacuum drying, and the finally obtained silica microspheres had a particle size of 300±5nm.

[0091] (2) Synthesis of silica microspheres modified with mercaptosilane coupling agent: In anhydrous toluene, add the silica microspheres prepared in step (1), and disperse them ultrasonically for 30 minutes (ultrasonic power is 300W, temperature is 35 ℃), then add silane coupling agent, pass nitrogen gas to remove oxygen for 40min, stir and react at room temperature for 48h, wash the product with acetone, toluene, and ethanol for several times, and then dry in vacuum at room temperature for 24h to obtain modified silica micros...

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Abstract

The invention belongs to the field of super-amphiphobic materials, and discloses a multifunctional fluorine-containing microsphere as well as a preparation method and application thereof. The multifunctional fluorine-containing microsphere is prepared through the following steps: an inorganic microsphere is modified through a hydrosulphonyl-containing silane coupling agent, so as to obtain a modified inorganic microsphere; a hydrophilic monomer A, epoxy-containing double-bond monomer B and a fluorine-containing monomer C are triggered through hydrosulphonyl on the modified inorganic microsphere, so that the fluorine-containing microsphere with a multifunctional polymer grafted on the surface is obtained. According to the invention, a random copolymer is grafted on the surface of the inorganic microsphere through a one step method, the structure of the surface-grafting part can be adjusted through feeding ratio of monomers, and the method is a simple and feasible preparation method for the super-amphiphobic materials; in addition, the multifunctional fluorine-containing microsphere can endow base material with super hydrophobicity and oleophobicity, the hydrophobicity and oleophobicity of the surfaces of materials can be adjusted through the number of fluorine atoms; obtained super-amphiphobic surfaces has excellent scrub resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the field of super-amphiphobic materials, and in particular relates to a multifunctional fluorine-containing microsphere and a preparation method and application thereof. Background technique [0002] Surface wettability is one of the important characteristics of solid surfaces. The wettability can be measured by the contact angle of water on the surface. Usually, the surface with a water contact angle of more than 150° and a rolling angle of less than 10° is called a superhydrophobic surface. The surface has a contact angle of more than 150° to oil, which can be considered as a superoleophobic surface. Superamphiphobic surfaces have the characteristics of antifouling, self-cleaning, and hydrophobic properties, and have important application prospects in industrial and agricultural production and daily life. [0003] The roughness and low surface energy of solid surfaces are the most critical factors for the preparation of sup...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/32C08F220/22C08F220/28C08F220/24C08F224/00C09D151/10C09D5/00B05D5/08B05D7/06B05D7/24C08J3/24D06M15/21D21H17/34D21H21/16D21H19/20C03C17/30C01B33/12C01F7/02C01G49/08D06M101/06
Inventor 胡继文李妃邹海良林树东杨洋苗磊涂园园刘国军
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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