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High-dispersivity super-amphiphobic microsphere and self-cleaning epoxy resin paint prepared from same

A technology of super amphiphobic microspheres and high dispersion, which is applied in the direction of epoxy resin coatings and coatings, and can solve problems such as weak adhesion, inability to disperse, and fluorine-containing solvents

Inactive Publication Date: 2012-07-18
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

[0012] In order to overcome the shortcomings and deficiencies of existing superamphiphobic self-cleaning materials that need to contain fluorine-containing solvents, have weak adhesion, and cannot be dispersed on the surface of epoxy resin, the primary purpose of the present invention is to provide a highly dispersed superamphiphobic Microspheres, the highly dispersed super-amphiphobic microspheres are grafted on the surface of ordinary fluorinated microspheres with a fluoropolymer that can be dispersed in epoxy resin, so that the super-amphiphobic microspheres do not need to contain fluorine Solvent can realize its dispersion in epoxy resin

Method used

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  • High-dispersivity super-amphiphobic microsphere and self-cleaning epoxy resin paint prepared from same
  • High-dispersivity super-amphiphobic microsphere and self-cleaning epoxy resin paint prepared from same
  • High-dispersivity super-amphiphobic microsphere and self-cleaning epoxy resin paint prepared from same

Examples

Experimental program
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Effect test

Embodiment 1

[0081] Preparation of Silica Microspheres Containing Hydroxyl on Surface

[0082] Add 100ml of absolute ethanol, 2ml of deionized water and 4ml of ammonia water into a 100ml round-bottomed flask, then dropwise add 3.5ml of tetraethyl orthosilicate, react at 25°C for 24 hours, and centrifuge and wash the product three times with absolute ethanol to obtain The silicon dioxide microspheres were freeze-dried in a vacuum, and the particle size of the finally obtained silicon dioxide microspheres was 160±5nm.

Embodiment 2

[0084] Preparation of Silica Microspheres Containing Amino Groups on the Surface

[0085] Add 100ml of absolute ethanol, 4ml of deionized water and 3ml of ammonia water into a 100ml round-bottomed flask, then dropwise add 4ml of tetraethyl orthosilicate, react at 25°C for 24 hours, and centrifuge and wash the product three times with absolute ethanol to obtain The silica microspheres were freeze-dried in a vacuum, and the finally obtained silica microspheres had a particle size of 91±4nm.

[0086] Disperse 2g of 90nm silicon dioxide in 60ml of anhydrous toluene, add 5ml of aminopropyltriethoxysilane, reflux at 105°C for 48h after filling with nitrogen, then wash with anhydrous toluene and anhydrous acetone in sequence, and vacuum dry to obtain Aminated silica.

Embodiment 3

[0088] Preparation of polymer microspheres with hydroxyl groups on the surface

[0089] Under stirring, gradually add 100 milliliters of distilled water, the mixture of 5.80 grams of methyl methacrylate and 0.6 gram of ethylene glycol dimethacrylate in a 500 milliliter three-necked flask, and 41 milligrams of potassium peroxodisulfate aqueous solution (5 milliliters) . Nitrogen was blown through the reaction system at 25°C for 15 minutes to remove oxygen in the system. Then it was heated to 90° C. in an oil bath and reacted for 4 hours.

[0090] 43 ml of the solution was taken out from the above system, added to a 250 ml three-necked flask filled with nitrogen, and 0.6 ml of tetrahydrofuran solution in which 1.4 mg of azobisisobutyronitrile was dissolved was added. After stirring for 15 minutes at 25°C, it was heated to 90°C. Subsequently, a mixed solution containing 0.56 g of ethylene glycol diester 2-chloropropionate, 40 microliters of ethylene glycol dimethacrylate and 0...

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Abstract

The invention discloses a high-dispersivity super-amphiphobic microsphere and self-cleaning epoxy resin paint prepared from the same. The high-dispersivity super-amphiphobic microsphere is prepared by the following methods that: microspheres, alkali amine catalysts, alpha-halogen acyl bromide or alpha-halogen acyl chloride are mixed for reaction, and microspheres with the surfaces grafted with atom transfer radical polymerization (ATRP) initiators are obtained; the microspheres with the surfaces grafted with the atom transfer radical polymerization (ATRP) initiators are subjected to ATRP random copolymerization or block polymerization reaction with fluorine-containing solvents, and microspheres with the surfaces grafted with monomers F and monomers D capable of taking D-A reaction are obtained; and the microspheres and high-dispersivity substances with compounds A as end bases are enabled to take reaction to obtain the high-dispersivity super-amphiphobic microsphere. According to the high-dispersivity super-amphiphobic microsphere and the self-cleaning epoxy resin paint, polymers capable of being dispersed into the epoxy resin paint are introduced on the super-amphiphobic microsphere interface, so the high-dispersivity super-amphiphobic microsphere can be directly dispersed into the epoxy resin paint, the problems of difficult dispersing and poor bonding force in the use process of the existing uper-amphiphobic microsphere are solved, and the poisonous fluorine-containing solvent adoption is also avoided.

Description

technical field [0001] The invention belongs to the field of polymer superamphiphobic materials, in particular to a highly dispersed superamphiphobic microsphere and a preparation method thereof, and a self-cleaning epoxy resin coating prepared from the superamphiphobic microsphere. Background technique [0002] Nanomaterials and micro-nano composite materials, especially micro-nano composite materials with special wettability, are important directions in the scientific research and practical application of nanomaterials. Wherein, the superhydrophobic surface refers to those solid surfaces whose surface static contact angle is greater than 150°, and this special state (property) of the solid surface is called the superhydrophobic state (property). If the static contact angles of water and oil on a surface are both greater than 150° and the rolling angles are less than 5°, the interface can be called a superamphiphobic interface; since the interface has the function of hydrop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C08F292/00C08F265/04C08F293/00C09D163/00C09D187/00C09D7/12C09D5/00
Inventor 胡继文邹海良候成敏张干伟何谷平李银辉涂园园刘国军胡攸卢汝烽李伟刘锋
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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