Preparation method of aqueous super-hydrophobic/super-hydrophobic and oileophobic coating

A super-hydrophobic and super-amphiphobic technology, used in coatings, antifouling/underwater coatings, anti-corrosion coatings, etc., can solve the problems of difficult dispersion and low surface energy of active components, and achieve excellent mechanical stability, Good environmental stability and excellent performance

Inactive Publication Date: 2017-06-09
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods all adopt the water-based method to prepare super-amphiphobic coatings, but the use of ethanol, surfactants, water-soluble organic solvents (tetrahydrofuran, N,N -dimethylformamide), etc.
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Method used

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  • Preparation method of aqueous super-hydrophobic/super-hydrophobic and oileophobic coating
  • Preparation method of aqueous super-hydrophobic/super-hydrophobic and oileophobic coating
  • Preparation method of aqueous super-hydrophobic/super-hydrophobic and oileophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 0.8g attapulgite, add it into a 100mL Erlenmeyer flask, then measure 80mL water respectively, adjust the pH to 5, stir magnetically for 10min, and sonicate for 30min. After that, 0.5 mL of methyltrimethoxysilane was measured and added into the Erlenmeyer flask, and stirred and reacted at room temperature for 24 hours to obtain a uniform organosilane polymer / attapulgite composite suspension. Measure 4mL of the organosilane polymer / attapulgite composite suspension, spray on the glass surface at a spraying pressure of 0.2MPa, a spraying distance of 15cm, and a substrate heating temperature of 50°C to obtain a water-based superhydrophobic coating. Depend on figure 1 The transmission electron microscope photos show that the smooth surface of the attapulgite is covered with a large number of organosilane polymer nanoparticles. figure 2 It can be seen from the scanning electron microscope photos that the coating is composed of attapulgite modified by organosilane poly...

Embodiment 2

[0036] Weigh 0.2g of SiO with a diameter of 100nm 2Add nanoparticles into a 50mL Erlenmeyer flask, then measure 40mL water to adjust the pH to 3, stir magnetically for 10min, and sonicate for 30min. Then measure 0.1mL of hexadecyltrimethoxysilane, 0.2mL of ethyl orthosilicate and 0.1mL of aminopropyltrimethoxysilane, add them into the Erlenmeyer flask, stir and react at room temperature for 24h to obtain a homogeneous organosilane polymerization Matter / SiO 2 Complex suspension. Measure 4mL organosilane polymer / SiO 2 The composite suspension is sprayed on the surface of the aluminum sheet under the control of the spraying pressure of 0.2MPa, the spraying distance of 20cm, and the substrate heating temperature of 100°C to obtain a superhydrophobic coating. Depend on image 3 It can be seen that the coating exhibits good repellency to water, and the surface does not wet after soaking in water for 24 h. The contact angle and rolling angle were measured with 5 μL water droplet...

Embodiment 3

[0038] Weigh 10g of titanium dioxide with a diameter of 30nm and add it into a 200mL Erlenmeyer flask, then measure 160mL of water respectively, adjust the pH to 2, stir mechanically for 10min, and sonicate for 30min. Then measure 0.3mL tetraethoxysilane, 1.2mL perfluorodecyltriethoxysilane and 0.05mL phenyltriethoxysilane, add them into the Erlenmeyer flask, stir and react at room temperature for 12h to obtain a uniform organosilane Polymer / titanium dioxide composite suspension. Measure 2mL of organosilane polymer / titanium dioxide composite, control spraying pressure 0.3MPa, spraying distance 10 cm, substrate heating temperature 50 ℃ to spray on the glass surface to obtain water-based superamphiphobic coating. The contact angle and rolling angle were measured with 5 μL water droplet and n-decane droplet. The results showed that: the contact angle of the layer to water was >159°, and the rolling angle was 150°, and the rolling angle was <16°.

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Abstract

The invention discloses a preparation method of a water-based super-hydrophobic or super-amphiphobic coating. Nano-particles are ultrasonically dispersed into water, the pH of the solution is adjusted to obtain a nano-particle dispersion; The silane coupling agent is hydrolyzed under stirring to obtain an organosilane polymer/nanoparticle composite suspension; and then applied to the surface of the base material by spraying or dipping to obtain a water-based superhydrophobic/superamphiphobic coating. The present invention successfully prepares a water-based super-hydrophobic or super-amphiphobic coating with excellent performance without using any additives (organic solvent, surfactant and water-based solvent), and has many advantages such as water-based environmental protection, low price and excellent performance. , It has broader application prospects in the fields of self-cleaning surface, anti-corrosion coating, oil pollution prevention and oil transportation.

Description

technical field [0001] The invention relates to a method for preparing a water-based super-hydrophobic / super-amphiphobic coating, in particular to a method for preparing a water-based super-hydrophobic / super-amphiphobic coating by using water as a solvent, and belongs to the technical field of surface bionic coating preparation. Background technique [0002] Surfaces with special wettability (superhydrophobic and superamphiphobic surfaces) have broad application prospects in many fields such as surface anticorrosion, antifouling, oil transportation and fluid drag reduction. The surface exhibits great repulsion to water and low surface energy organic liquids. At present, its preparation is mainly realized by controlling the chemical composition and microstructure of the solid surface, and the methods include phase separation, photolithography, anodic oxidation, sol-gel method, and CVD deposition. In the patent CN105085953A, a poor solvent and a good solvent are mixed and add...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D183/08C09D7/12C09D5/16C09D5/08C09D7/00
CPCC09D183/04C08K3/22C08K3/346C08K3/36C08K7/24C08K7/26C08K2003/2241C08K2201/011C09D5/08C09D5/16C09D7/20C09D7/61C09D7/67C09D7/68C09D7/70C09D183/08
Inventor 张俊平李步成李凌霄
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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