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Super hydrophobic self-cleaning coating and preparation method thereof

A self-cleaning coating and super-hydrophobic technology, applied in the field of super-hydrophobic self-cleaning coating and its preparation, can solve the problems of high cost of raw materials and equipment, difficulty in large-scale industrialization, and low practical value, and reduce the surface The effect of current conduction, environmental friendliness, and good industrial application prospects

Active Publication Date: 2014-12-10
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patented technical solution not only requires high-cost fluoropolymers as raw materials, but also requires additional UV light to cure the coating, which is greatly limited in use.
[0008] However, these existing methods either use expensive materials (such as siloxanes with extremely low surface flashes) or toxic solvents (such as toluene, xylene, etc.), or require special processing equipment (such as plasma, electrochemical deposition, etc.) , laser irradiation, etc.) or complex process, so the actual use value is low, the cost of raw materials and equipment is high, and it is difficult to large-scale industrialization

Method used

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  • Super hydrophobic self-cleaning coating and preparation method thereof
  • Super hydrophobic self-cleaning coating and preparation method thereof
  • Super hydrophobic self-cleaning coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The chemical structural formula is (R 2 SiO) n 3.5g of hydrophobic silicone resin (wherein: R is methyl; n is 3~50, and this hydrophobic silicone resin is the product RHODORSIL-BP9400 of French Rhodia Company, is a kind of polymethylsiloxane oligomer) and SiO with a particle size of 15-25nm 2 1.5 g of the particles were dispersed in 46.5 g of cyclohexane, and magnetically stirred for 6 h to mix evenly to obtain a dispersion.

[0032] Carry out degreasing, decontamination, dewatering, oxygen plasma treatment (Chengdu Mingheng Technology Development Co., Ltd. PDC-M plasma cleaner) to the glass substrate, seal it for later use.

[0033] Add the above-prepared dispersion into the liquid-carrying barrel of the spray gun (Iwata small spray gun, the air compressor is Zhejiang Cixi Chaochao Air Compressor Parts Co., Ltd. BOX0506 type, the maximum pressure is 1.4MPa), and adjust the position of the spray gun so that it is in contact with the glass. The surface of the substrat...

Embodiment 2

[0037] The chemical structural formula is (R 2 SiO) n 3.5g of hydrophobic silicone resin (wherein: R is methyl; n is 3~50, and this hydrophobic silicone resin is the product RHODORSIL-BP9400 of French Rhodia Company, is a kind of polymethylsiloxane oligomer) and SiO with a particle size of 15-25nm 2 2.0 g of the particles were dispersed in 46.5 g of cyclohexane, and magnetically stirred for 10 h to mix evenly to obtain a dispersion.

[0038] The glass substrates were then treated as described in Example 1. Spray the uniformly mixed raw materials on the treated glass substrate, repeat spraying 4 times to prepare the coating, and dry it naturally for 5-10 minutes at room temperature and atmosphere, then drop 15 μL of deionized water on the superhydrophobic self-cleaning coating obtained above Surface, the static contact angle of described superhydrophobic self-cleaning coating and water is measured to be 142.5 °, and the rolling angle of water droplet on described superhydrop...

Embodiment 3

[0041] The chemical structural formula is (R 2 SiO) n 2g of hydrophobic silicone resin (where: R is a methyl group; n is 3-50, the hydrophobic silicone resin is RHODORSIL-BP9400, a product of Rhodia, France, which is a polymethylsiloxane oligomer) and granules SiO with a diameter of 15-25nm 2 1.5 g of the particles were dispersed in 48 g of cyclohexane, and magnetically stirred for 8 h to mix evenly to obtain a dispersion. The glass substrates were then treated as described in Example 1. Spray the uniformly mixed raw materials on the treated glass substrate, repeat spraying 5 times to prepare the coating, and dry it naturally for 5-10 minutes at room temperature and atmosphere, then drop 15 μL of deionized water on the superhydrophobic self-cleaning coating obtained above The surface of the surface, the measured static contact angle with water is 149.5 °, and the rolling angle of water droplets on the surface of the super-hydrophobic self-cleaning coating is less than 0.1 °...

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Abstract

The invention belongs to the technical field of preparation of nano materials, and in particular relates to a super hydrophobic self-cleaning coating and a preparation method thereof. The method comprises the following steps of: dispersing hydrophobic silicon resin and hydrophilic nano SiO2 particles into an organic solvent to obtain dispersion; and spraying the dispersion on a clean and dry glass sheet substrate, drying, and thus obtaining the super hydrophobic self-cleaning coating. The coating has a hierarchical structure compounded by using organic and inorganic components, namely the hydrophobic silicon resin and the hydrophilic nano SiO2 particles, and the structure has compound micro-nano surface topography; and the compound micro-nano hierarchical structure is constructed by spheroid-like protrusions with the diameters of 1 to 10 microns and agglomerate spheres with the diameters of 20 to 100 nanometers on the surface of the coating, wherein the spheroid-like protrusions are constructed by agglomerate spheres with the diameters of 20 to 100 nanometers. The contact angle between the coating and water is 140 to 155 degrees, and the rolling angles of water drops on the surface of the coating are less than 2 degrees.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a superhydrophobic self-cleaning coating and a preparation method thereof. Background technique [0002] Fogging, fouling, frosting and other phenomena have caused great troubles to people's daily work and life, and will inevitably cause resource and energy consumption and environmental pollution. Therefore, in order to improve the working and living environment, reduce the waste of resources and energy, and protect the environment, many scientific research institutions have invested a lot of manpower and material resources to solve these problems. In recent years, the research work on self-cleaning functional surfaces has developed rapidly and has broad application prospects. [0003] The self-cleaning property of the material surface is a unique physical and chemical characteristic of the material surface. The surface of this material does not need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23C03C17/32
Inventor 贺军辉王东
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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