Method for preparing high-temperature-resistant super-hydrophobic coating in situ

A super-hydrophobic coating, in-situ preparation technology, applied in the field of in-situ preparation of super-hydrophobic coatings, can solve problems such as unfavorable environmental protection and human health, high requirements for the environment and operators, and poor coating surface adhesion. , to achieve the effect of easy control, wide application value and high degree of environmental protection

Inactive Publication Date: 2013-12-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent (CN1544482) through the fluorine-containing monomer 60 Co irradiated, in the atmosphere of non-fluorine-containing olefins, polymerized into a superhydrophobic film, and prepared a fluorine-containing copolymer. The contact angle of the film was greater than 130°. The surface water contact angle obtained by this method was relatively low, and the raw material contained Fluorine, expensive materials, relatively difficult to operate, high requirements on the environment and operators
Chinese patent (CN1272114C) reported the use of non-crystalline polymer phase separation during the volatilization of poor solvents to form a rough super-hydrophobic surface to achieve super-hydrophobic phenomenon. The surface adhesion of the coating produced by this method is extremely poor, and at the same time Some reagents are toxic (toluene, benzene, etc.), which is not conducive to environmental protection and human health
Chinese patent (CN102553812A) uses etching on the surface of the polymer substrate to prepare the primary structure of the columnar array of the same material as the subst

Method used

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  • Method for preparing high-temperature-resistant super-hydrophobic coating in situ
  • Method for preparing high-temperature-resistant super-hydrophobic coating in situ
  • Method for preparing high-temperature-resistant super-hydrophobic coating in situ

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Embodiment 1

[0029] The in-situ preparation method of the high temperature resistant superhydrophobic coating of the present embodiment comprises the following steps:

[0030] (1) In-situ copolymerization of organosilicon monomers and inorganic particles: Add 0.5g of silica nanoparticles to 15ml of ethanol solution containing 2ml of water and raise the temperature to 80°C, add 1.50g of Add alkane monomer and drop a few drops of hydrochloric acid as a catalyst to stir for 3 hours, then add 0.82g propyltrimethoxysiloxane monomer to the above system and react for 3 hours, and finally add 2.68g methyltrimethoxysiloxane monomer Reaction 10h, obtained organic-inorganic hybrid system;

[0031] (2) Preparation of sol nanoparticles: Add 4ml tetraethyl orthosilicate dropwise to 5ml ethanol solution containing 2ml ammonia water at 60°C, and keep warm for 3 hours to prepare sol nanoparticles that can exist stably;

[0032] (3) Preparation of coating solution: Add the sol nanoparticles prepared in ste...

Embodiment 2

[0037] The in-situ preparation method of the high temperature resistant superhydrophobic coating of the present embodiment comprises the following steps:

[0038] (1) In-situ copolymerization of organosilicon monomers and inorganic particles: Add 0.6g of silica nanoparticles to 20ml of ethanol solution containing 3ml of water and raise the temperature to 70°C, add 1.70g of diphenyldimethoxy Add siloxane monomer and drop a few drops of hydrochloric acid as a catalyst to stir for 4 hours, then add 1.00g of propyltrimethoxysiloxane monomer to the above system and stir for 4 hours, and finally add 3.00g of methyltrimethoxysiloxane The alkane monomer was stirred and reacted for 12 hours to obtain an organic-inorganic hybrid system.

[0039] (2) Preparation of sol nanoparticles: Add 3ml tetraethyl orthosilicate dropwise to 50ml ethanol solution containing 3ml ammonia water at 50°C, heat and stir for 5 hours to prepare sol nanoparticles that can exist stably;

[0040] (3) Preparatio...

Embodiment 3

[0045] The in-situ preparation method of the high temperature resistant superhydrophobic coating of the present embodiment comprises the following steps:

[0046] (1) In-situ copolymerization of organosilicon monomers and inorganic particles: Add 1.0g of silica nanoparticles to 30ml of ethanol solution containing 4ml of water, raise the temperature to 75°C, and dissolve 3.1g of diphenyldimethoxysilane Add oxane monomer and drop a few drops of hydrochloric acid as a catalyst to stir for 5 hours, then add 1.5g of propyltrimethoxysiloxane monomer to the above system for 3 hours, and finally add 5.4g of methyltrimethoxysiloxane monomer The solid was stirred and reacted for 12 hours to obtain an organic-inorganic system.

[0047] (2) Preparation of sol nanoparticles: Add 2ml tetraethyl orthosilicate dropwise to 50ml ethanol solution containing 4ml ammonia water at 70°C, heat and stir for 4 hours to prepare sol nanoparticles that can exist stably;

[0048] (3) Preparation of coatin...

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Abstract

The invention discloses a method for preparing a high-temperature-resistant super-hydrophobic coating in situ. The method comprises the following steps: (1) conducting in-situ copolymerization of organosilicon monomers and nano silicon dioxide particles; (2) preparing sol nano particles; (3) preparing a coating solution; (4) preparing a super-hydrophobic surface; (5) performing thermal treatment on a coating. The method solves the problems of small adhesive force, complex technology, high cost, expensive raw materials and the like of the conventional super-hydrophobic coating. The contact angle between water and the super-hydrophobic coating prepared in the invention is 150-160 degrees, the rolling angle is smaller than or equal to than 5 degrees, and the adhesive force can reach the first grade; the super-hydrophobic coating can keep a super-hydrophobic property even after being heated at 450 DEG C, and has unique properties of self cleaning, corrosion resistance and super hydrophobicity. The method is simple in process, and convenient to operate,. The super-hydrophobic coating is suitable for large-area construction, and has a potential and wide application value in various fields such as the industry, construction, national defense and medicine.

Description

technical field [0001] The invention relates to a preparation method of a hydrophobic coating, in particular to an in-situ preparation method of a high-temperature-resistant super-hydrophobic coating. Background technique [0002] People's understanding of the phenomenon of superhydrophobicity originally came from nature. For example, lotus leaves can emerge from mud without staining because of the superhydrophobicity on the surface. The key reason is that there are a large number of micro-nano structure milky protrusions on the leaf surface and Commonly caused by the waxy substance. This phenomenon and reason have aroused great interest of material researchers, and a variety of superhydrophobic coating materials have been prepared. [0003] Chinese patent (CN1544482) through the fluorine-containing monomer 60 Co irradiated, in the atmosphere of non-fluorine-containing olefins, polymerized into a superhydrophobic film, and prepared a fluorine-containing copolymer. The cont...

Claims

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Application Information

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IPC IPC(8): C09D183/04B05D5/08B05D3/02
Inventor 卢珣李恒
Owner SOUTH CHINA UNIV OF TECH
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