Renewable super-hydrophobic coating

A technology of superhydrophobic coating and calcium hydroxide, which is applied in chemical and petroleum fields, can solve the problems of less development of renewable superhydrophobic coating, high preparation temperature, and short time, and achieve good self-cleaning property, easy preparation method and simple preparation Effect

Inactive Publication Date: 2012-05-16
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

However, the research and development time for special functional superhydrophobic surfaces in China is currently relatively short, especially for the development of renewable superhydrophobic coatings.
Sun Junqi of Jilin University and others (Chinese Invention Patent 201010107704.0) disclosed a method for preparing a self-healing superhydrophobic coating. The effect is relatively obvious. However, the process steps are relatively complicated and the preparation temperature is too high, which limits its wide application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Calcium Hydroxide 50g

[0019] Polyfurfuryl alcohol 100g

[0020] Mixed solvent (700 grams of acetone, 300 grams of ethyl acetate) 1000 grams

[0021] Potassium Stearate 200g

[0022] water 1000g

[0023] Ethanol 1000g

[0024] Each component is weighed in proportion, mixed and stirred evenly to prepare a renewable super-hydrophobic coating. Use a spray gun to spray on the surface of the steel block that has been dewatered, degreased, and derusted under the pressure of 0.1-0.2 MPa. Put the sprayed steel block in an oven and cure it at 150°C for 1 hour, and then put the cured coating on Soak in the coating for 5 hours, take it out and dry it with nitrogen, drop 5 μL of distilled water on the coating surface, measure the contact angle of 156-161°, and the coating exhibits superhydrophobic properties; then perform a renewable performance test on the superhydrophobic coating , scratch the surface of the damaged coating with a blade, and measure its contact angle as 92-...

Embodiment 2

[0026] Calcium Hydroxide 50g

[0027] Polyfurfuryl alcohol 50g

[0028] Mixed solvent (600 grams of acetone, 200 grams of ethyl acetate) 800 grams

[0029] Potassium Stearate 200g

[0030] water 1000g

[0031] Ethanol 1200g

[0032] Each component is weighed in proportion, mixed and stirred evenly to prepare a renewable super-hydrophobic coating. Use a spray gun to spray on the surface of the steel block that has been dewatered, degreased, and derusted under the pressure of 0.1-0.2 MPa. Put the sprayed steel block in an oven and cure it at 170°C for 1 hour, and then put the cured coating on Soak in the coating for 3 hours, take it out and dry it with nitrogen, drop 5 μL of distilled water on the coating surface, measure the contact angle of 156-163°, and the coating exhibits superhydrophobic properties; then perform a renewable performance test on the superhydrophobic coating , scratch the surface of the damaged coating with a blade, and measure its contact angle as 108-1...

Embodiment 3

[0034] Calcium Hydroxide 50g

[0035] Polyfurfuryl alcohol 80g

[0036] Mixed solvent (600 grams of acetone, 300 grams of ethyl acetate) 900 grams

[0037] Potassium Stearate 200g

[0038] water 1000g

[0039] Ethanol 1100g

[0040] Each component is weighed in proportion, mixed and stirred evenly to prepare a renewable superhydrophobic coating. Use a spray gun to spray on the surface of the steel block that has been dewatered, degreased, and derusted under the pressure of 0.1-0.2 MPa. Put the sprayed steel block in an oven and cure it at 150°C for 1 hour, and then put the cured coating on Soak in the coating for 4 hours, take it out and blow it dry with nitrogen, drop 5 μL of distilled water on the coating surface, measure the contact angle of 153-160°, and the coating exhibits superhydrophobic properties; then perform a renewable performance test on the superhydrophobic coating , scratch the surface of the damaged coating with a blade, and measure its contact angle as 1...

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Abstract

The invention discloses a renewable super-hydrophobic coating, which consists of a binder, a filler, a mixed solvent and a surfactant. The binder is made of poly(furfuryl alcohol), the filler is made of calcium hydroxide, the mixed solvent consists of acetone and ethyl acetate, and the surfactant is a mixture of potassium stearate, water and ethanol. The coating has a special function of becoming super-hydrophobic once again by virtue of surface regeneration after surface failure.

Description

technical field [0001] The invention describes a renewable super-hydrophobic coating, which is suitable for various solid surfaces with higher requirements on wettability, and can be applied to the fields of petroleum, chemical industry and the like. Background technique [0002] Because the superhydrophobic surface has cleaning type, antifouling property, hydrophobicity and so on. It has wide application prospects in fields such as outdoor antennas, exterior wall coatings, ships, biomedical devices, and automobile windshields. In recent years, the research on superhydrophobic materials has made great progress in both research fields and preparation methods. The in-depth research on superhydrophobic properties has greatly enhanced people's demand for materials with special surface wettability. [0003] However, due to the strong dependence of the superhydrophobic surface on the microstructure, its surface is easily damaged in the natural environment or under harsh use condi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D171/14C09D7/12C09D5/00
Inventor 门学虎张招柱杨进
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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