A facile preparation method for low-cost high-strength repairable superhydrophobic coatings

A super-hydrophobic coating, high-strength technology, applied in coatings, epoxy resin coatings, etc., can solve the problems of high production cost of super-hydrophobic coating surface, complicated preparation or coating method, and difficult to prepare in large area. High mechanical strength, low cost and wide applicability

Active Publication Date: 2019-06-11
HUBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a simple preparation method of a practical low-cost high-strength repairable super-hydrophobic coating to solve the problems of high production cost, complicated preparation or coating methods, weak mechanical strength, and difficulty in large-scale preparation of the super-hydrophobic coating surface. , Narrow application range and other issues

Method used

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  • A facile preparation method for low-cost high-strength repairable superhydrophobic coatings
  • A facile preparation method for low-cost high-strength repairable superhydrophobic coatings
  • A facile preparation method for low-cost high-strength repairable superhydrophobic coatings

Examples

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Effect test

Embodiment 1

[0032] (1) Preparation of epoxy resin superhydrophobic suspension coating: 1.67g of metal oxide powder MgO, 0.33g of metal oxide powder P25 and 2g of stearic acid as a low surface energy modifier were added to a solvent of 20mL of acetone. After stirring for 10 minutes, 1.2 g of epoxy resin (E51) and its curing agent were added to the system at a ratio of 3:1, and after ultrasonic treatment for 20 minutes, the stirring was continued to obtain an epoxy resin superhydrophobic suspension coating.

[0033] (2) Preparation of epoxy resin superhydrophobic coating: the epoxy resin superhydrophobic suspension coating obtained in step A was applied to the glass substrate by drop coating technique with a dropper. After curing and drying at 70°C for 5 hours, an epoxy superhydrophobic coating can be obtained on the glass substrate (see figure 1 ), the water droplets stand on its surface in a nearly perfect spherical shape. Its contact angle to water is 152°, and its rolling angle is abou...

Embodiment 2

[0036] (1) Preparation of epoxy resin superhydrophobic suspension coating: 1 g of metal oxide powder MgO, 1 g of metal oxide powder P25 and 2 g of stearic acid as a low surface energy modifier were added to 20 mL of acetone solvent. After stirring for 30 minutes, 1.2 g of epoxy resin (E51) and its curing agent were added to the system at a ratio of 3:1, and after ultrasonic treatment for 20 minutes, the stirring was continued to obtain an epoxy resin superhydrophobic suspension coating.

[0037] (2) Preparation of epoxy resin superhydrophobic coating: coating the epoxy resin superhydrophobic suspension obtained in step A, immersing the copper grid in the superhydrophobic suspension for a few seconds and slowly extracting it. After curing and drying at 70°C for 5 hours, an epoxy superhydrophobic coating can be obtained on the copper grid (see Figure 5 ), water droplets can also stand on its surface in a nearly perfect spherical shape.

Embodiment 3

[0039] (1) Preparation of epoxy resin superhydrophobic suspension coating: 1.67g of metal oxide powder MgO, 0.33g of metal oxide powder P25 and 2g of stearic acid as a low surface energy modifier were added to a solvent of 20mL of acetone. After stirring for 15 minutes, 1.2 g of epoxy resin (E51) and its curing agent were added to the system at a ratio of 3:1. After ultrasonic treatment for 60 minutes, the stirring was continued to obtain an epoxy resin superhydrophobic suspension coating.

[0040] (2) Preparation of epoxy resin superhydrophobic coating: the epoxy resin superhydrophobic suspension coating obtained in step A was applied to the glass substrate by drop coating technique with a dropper. After curing and drying at room temperature for 24 hours, an epoxy superhydrophobic coating can be obtained on the glass substrate.

[0041] (3) Repairable experiment: the obtained glass substrate with superhydrophobic coating is immersed in 1M sodium hydroxide solution for 30 seco...

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Abstract

The invention belongs to the technical field of the preparation of super-hydrophobic coating materials, and in particular relates to a simple preparation method of a low-cost high-strength repairable super-hydrophobic coating. The preparation method comprises the following steps: preparing an epoxy resin super-hydrophobic suspension coating, preparing an epoxy resin super-hydrophobic coating, and the like. The epoxy resin super-hydrophobic coating material can be applied to different solid substrates of different dimensions; and moreover, in the existence of the high-strength epoxy resin, the epoxy resin super-hydrophobic coating has extremely high mechanical stability, and has rapid friction-induced repairing performance so as to deal with different extreme application environments. The preparation method of the epoxy resin super-hydrophobic coating is very simple and can be formed by mixing and stirring all raw materials in a short time by virtue of a one-pot method. The preparation process is simple, raw materials are easy to get and non-toxic and environment-friendly, the cost is low, the stability is high, and mass preparation can be realized.

Description

technical field [0001] The invention belongs to the technical field of preparation of super-hydrophobic coatings, and in particular relates to a simple preparation method of a practical, low-cost, high-strength and repairable super-hydrophobic coating that can be applied to various solid substrates. Background technique [0002] Nature has always been the mentor of human wisdom. Learning from nature is not only an important means for human beings to invent new materials and technologies, but also promotes the progress of human social civilization. As a result, bionics has become an important branch of science. Inspired by the surface of lotus leaves in nature, the phenomenon of superhydrophobicity has gradually attracted people's attention. Superhydrophobic surfaces—with water contact angles greater than 150° and roll angles less than 10°—are a classic example. Because of its unique and excellent surface properties such as self-cleaning, anti-corrosion, anti-icing, anti-fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D7/61C09D7/63C09D7/80
CPCC08K3/22C08K5/09C08K2003/222C08K2003/2241C09D7/61C09D7/63C09D7/80C09D163/00
Inventor 郭志光司一帆
Owner HUBEI UNIV
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