Preparation method for super-hydrophobic coating

A technology of superhydrophobic coating and glycidol, which is applied in the direction of coating, etc., can solve the problems of easy aging, insufficient stability of superhydrophobic surface, and insufficient washing resistance, and achieve stable hydrophobic performance, simple and efficient preparation method, and good acid resistance. Effect

Inactive Publication Date: 2017-11-24
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods for preparing super-hydrophobic surfaces mainly include: electrochemical corrosion method, sol-gel method, phase separation method, electrostatic separation method, etc., but the super-hydrophobic surface prepared by most methods is not stable enough, easy to aging and resistant to acid and alkali. , Insufficient salt resistance and washing resistance

Method used

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  • Preparation method for super-hydrophobic coating
  • Preparation method for super-hydrophobic coating
  • Preparation method for super-hydrophobic coating

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preparation example Construction

[0034] A kind of preparation method of superhydrophobic coating of the present invention, specifically implement according to the following steps:

[0035] Step 1. Take glycidyl methacrylate (GMA), and filter the glycidyl methacrylate (GMA) with an alumina chromatography column to remove the polymerization inhibitor.

[0036] Step 2. Weighing dodecafluoroheptyl methacrylate (DFMA), glycidyl methacrylate (GMA) treated in step 1 and Azobisisobutyronitrile and sodium bisulfite;

[0037] Among them, dodecafluoroheptyl methacrylate (DFMA) and glycidyl methacrylate (GMA) are used as raw materials, and azobisisobutyronitrile and sodium bisulfite are used as initiators.

[0038] Step 3. Add all the materials weighed in step 2 into the container together, then add tetrahydrofuran into the container, seal the container and pass nitrogen gas for 45min to 55min, the purpose is to discharge the oxygen in the container;

[0039] Wherein, tetrahydrofuran is a solvent, nitrogen is a protect...

Embodiment 1

[0060] Take glycidyl methacrylate (GMA), and filter the glycidyl methacrylate (GMA) with an alumina chromatography column to remove the polymerization inhibitor; weigh 10% methacrylic acid respectively according to the molar ratio of 9:1:0.06:0.1 Difluoroheptyl ester (DFMA), treated glycidyl methacrylate (GMA), and azobisisobutyronitrile and sodium bisulfite; add all weighed materials together to a round-bottomed flask, and add to the round-bottomed flask Add tetrahydrofuran to the flask, seal the round-bottomed flask and ventilate nitrogen for 45 minutes to discharge the oxygen in the round-bottomed flask; place the whole round-bottomed flask in an oil bath constant temperature pot with a temperature of 65°C and heat it under the protection of nitrogen Turn on the magnetic stirring for 35 minutes to fully react the dodecafluoroheptyl methacrylate (DFMA), glycidyl methacrylate (GMA), azobisisobutyronitrile and sodium bisulfite in the round bottom flask. Pour out the reactants ...

Embodiment 2

[0067] Take glycidyl methacrylate (GMA), and filter the glycidyl methacrylate (GMA) with an alumina chromatography column to remove the polymerization inhibitor; weigh 10% methacrylic acid according to the molar ratio of 8:1:0.05:0.15. Difluoroheptyl ester (DFMA), treated glycidyl methacrylate (GMA), and azobisisobutyronitrile and sodium bisulfite; add all weighed materials together to a round-bottomed flask, and add to the round-bottomed flask Add tetrahydrofuran to the flask, seal the round-bottom flask and pass nitrogen gas for 50 minutes, and discharge the oxygen in the round-bottom flask; place the whole round-bottom flask in an oil bath constant temperature pot with a temperature of 70°C and heat it under the protection of nitrogen. Turn on the magnetic stirring for 40 minutes to fully react the dodecafluoroheptyl methacrylate (DFMA), glycidyl methacrylate (GMA), azobisisobutyronitrile and sodium bisulfite in the round bottom flask. Pour out the reactants formed in the r...

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Abstract

The invention discloses a preparation method for a super-hydrophobic coating. The method comprises the following steps: mixing dodecafluoroheptyl methacrylate, methacrylic acid glycidol, azodiisobutyronitrile and sodium hydrogen sulfite, adding tetrahydrofuran, reacting under a heating state so as to form a reactant, and standing to acquire the super-hydrophobic coating; mixing nanometer silicon dioxide, ethyl alcohol and water and then ultrasonically dispersing, thereby forming a turbid solution; regulating the PH value of the turbid solution to 7, adding a coupling reagent into the turbid solution, condensing and back-flowing under heating and stirring state, thereby acquiring the modified silicon dioxide; performing suction filtration by using an ethyl alcohol solution, thereby acquiring purified amino modified silicon dioxide; drying and grinding, thereby acquiring amino modified nanometer silicon dioxide; dissolving the super-hydrophobic coating by using tetrahydrofuran and then adding triethylamine and amino modified nanometer silicon dioxide in turn, thereby forming a modified solution; soaking the substrate into the modified solution, taking out and then drying. The super-hydrophobic coating prepared according to the preparation method disclosed by the invention has stable and long-lasting super-hydrophobic property and is reusable.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of hydrophobic coatings, and in particular relates to a preparation method of super-hydrophobic coatings. Background technique [0002] The wettability of a liquid on the surface of an object is measured by the static contact angle of the surface. When the static contact angle of the surface of the object is higher than 150°, the surface of the object is called a superhydrophobic surface. In recent years, superhydrophobic surfaces have attracted great attention from various industries due to their self-cleaning and water-repelling properties. Similar to lotus leaves, water droplets are not only easy to roll off on the super-hydrophobic surface, but also can take away the dust particles on the surface during the rolling process, thus achieving a self-cleaning effect. Superhydrophobic self-cleaning coating has many advantages such as waterproof, anti-fog, anti-snow, anti-pollution, anti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/16C09D7/12C08F220/24C08F220/32
CPCC08F220/24C08K2201/011C09D133/16C08K9/06C08K3/36C08F220/325
Inventor 曹从军马雅玲侯成敏
Owner XIAN UNIV OF TECH
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