Preparation method of super-hydrophobic resin coating

A super-hydrophobic coating and hydrophobic technology, which is applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of fragile micro-nano structures on super-hydrophobic surfaces, loss of super-hydrophobic properties, and vulnerability to damage. Strong force, not easy to fall off, strong controllable effect

Inactive Publication Date: 2016-12-07
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the micro-nano structure of the superhydrophobic surface prepared so far is relatively fragile, and it is easily damaged in practical applications. In the natural environment, superhydrophobic materials will lose their superhydrophobic properties under the action of wind and sand, sunlight and acid rain, which greatly affects their performance. In actual production and life, therefore, it is very necessary to choose a simple, fast and easy-to-obtain repair method

Method used

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  • Preparation method of super-hydrophobic resin coating
  • Preparation method of super-hydrophobic resin coating
  • Preparation method of super-hydrophobic resin coating

Examples

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Effect test

Embodiment 1

[0025] A preparation method of epoxy superhydrophobic coating: 1.8g epoxy resin E51, 0.18g epoxy resin curing agent 593, 0.55g hydrophobic nano-silicon dioxide and 15g acetone are stirred and mixed uniformly to obtain transparent coating, use The spray gun is sprayed on the glass sheet under the pressure of 2.5MPa, and cured at 100°C for 1 hour to obtain the epoxy resin superhydrophobic coating.

[0026] The SEM and contact angle photos of the resulting superhydrophobic coating can be found in figure 1 , the measured contact angle was 154.0±1°.

[0027] The relationship between the continuous residence time of strong acid or strong alkali droplets on the superhydrophobic coating and the contact angle is shown in figure 2 ,Depend on figure 2 It can be seen that the acid droplet (pH=1) is in continuous contact with the superhydrophobic coating, and after 20 minutes, the contact angle is 151±1°. After continuous contact with alkali drop (pH=14) for 25 minutes, the contact an...

Embodiment 2

[0029] A preparation method of epoxy resin superhydrophobic coating: 1.8g epoxy resin E51, 0.18g epoxy resin curing agent 593, 0.85g hydrophobic nano silicon dioxide and 15g n-hexane are stirred and mixed to obtain transparent coating, Use a spray gun to spray on a glass sheet under a pressure of 2.5MPa, and cure at 120°C for 1.5h to obtain an epoxy resin superhydrophobic coating.

[0030] The contact angle photo of the resulting superhydrophobic coating can be found in image 3 , the measured contact angle was 154±1°.

Embodiment 3

[0032] A preparation method of polyurethane superhydrophobic coating: 1.7g polyether polyurethane prepolymer, 0.17g 4,4'-methylenebis(2-chloroaniline), 0.6g hydrophobic nano-silica and 15g Xylene was stirred and mixed evenly to obtain a transparent coating, which was sprayed on a glass sheet with a spray gun at a pressure of 2.5 MPa, and cured at 100° C. for 1.5 h to obtain a polyurethane superhydrophobic coating. SEM and contact angle photos of gained polyurethane superhydrophobic coating are shown in Figure 4 , the measured contact angle was 152±1°.

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Abstract

The invention belongs to the technical field of functional materials, and particularly discloses a preparation method of super-hydrophobic resin coating. The preparation method includes uniformly dispersing polymer, curing agent and hydrophobic silica into organic solvent to obtain transparent coating, spraying a substrate with the transparent coating, and performing curing to obtain the super-hydrophobic coating. The super-hydrophobic coating can regain the original super-hydrophobic property by means of secondary spraying after being damaged and losing super-hydrophobicity. The coating prepared with the method is more than 150 degrees in static contact angle and less than 10 degrees in rolling angle, and has good super-hydrophobicity. The coating has strong binding force with the substrate, and has certain strong acid and alkali corrosion resistance. Besides, the coating prepared with the method can be sprayed on different substrates made of metal, ceramics, glass, cement and so on, and is wide in application range.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and in particular relates to a preparation method of a superhydrophobic coating. Background technique [0002] There are a wide range of superhydrophobic phenomena in nature, and many animals and plants have superhydrophobicity, such as lotus leaves, rose petals, geckos, butterflies, straw leaves and so on. Due to the unique properties of superhydrophobic materials, it has a very wide range of application prospects in the fields of self-cleaning, drag reduction, water collection, oil-water separation, anti-icing, waterproof, frictional drag reduction, microfluidic transportation, etc., which has attracted more and more attention. more attention. [0003] However, the micro-nano structure of the superhydrophobic surface prepared so far is relatively fragile, and it is easily damaged in practical applications. In the natural environment, superhydrophobic materials will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D175/08C09D5/08C09D7/12
CPCC08K3/36C08K2201/011C09D5/08C09D163/00C09D175/08C09D7/61
Inventor 张霞丁蓓职丹凤胡显祥张治军
Owner HENAN UNIVERSITY
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