Preparation method of super-amphiphobic coating

A super-amphiphobic and coating technology, applied in coatings and other directions, can solve the problems of difficult preparation of oleophobic materials, less research on super-oleophobic materials, and low surface tension, so as to improve hydrophobic and oleophobic properties and operability Strong, surface energy-reducing effect

Inactive Publication Date: 2014-10-01
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] With the development of society, a single super-hydrophobic coating can no longer meet people's needs. However, there are few reports on super-oleophobic materials and the research is slow. Less, can not be borrowed from nature like superhydrophobic materials; the surface tension of oil and other organic matter is low, it is difficult to prepare oleophobic materials, let alone super oleophobic materials
[0004] Since the 20th century, with the development of society, people have put forward higher and higher requirements for the development of new materials. A single material with hydrophobic function can no longer meet people's needs. Therefore, it is necessary to develop multifunctional superamphiphobic materials.

Method used

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  • Preparation method of super-amphiphobic coating

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preparation example Construction

[0014] The embodiment of the present invention provides a method for preparing a super-amphiphobic coating, comprising the following steps:

[0015] Step S1: preparing a fluorine-containing silane polymer solution;

[0016] Step S2: Then, hydrolyze the prepared fluorine-containing silane polymer by adding tetraethyl orthosilicate (TEOS), water, and hydrochloric acid to obtain a transparent solution; the mass fraction of the hydrochloric acid is 38%; the fluorine-containing silane polymer, The mass ratio of ethyl orthosilicate, water, and hydrochloric acid is (2-8): (1-5): (0.5-3): (0.2-1).

[0017] Step S3: add a certain amount of nano silicon dioxide (SiO2) to the transparent solution again 2 ), mixed uniformly to obtain composite sol;

[0018] Step S4: coating the composite sol on the substrate, curing and drying.

[0019] Wherein, in step S1, a free radical polymerization method is used to prepare the fluorine-containing silane polymer. Dissolve organic fluorine monomer...

Embodiment 1

[0024] First, dissolve 6g of organic fluorine monomer (DFMA), 3.72g of silane coupling agent (KH-570), and 0.32g of initiator (BPO) in 43.2g of organic solvent (THF) solvent, pour it into a cooling reflux device and stir In the three-necked flask of the device, control the temperature at 60-65°C for polymerization reaction for 6 hours to form a fluorine-containing silane polymer solution. Add 3.12gTEOS, 2gH to the fluorosilane polymerization solution 2 O and an appropriate amount of hydrochloric acid to adjust the pH to 3-4, and continue stirring for 5 hours for hydrolysis to obtain a transparent fluorine-containing silane polymer solution. Take a certain amount of nano-SiO 2 Particles were added to the transparent fluorosilicone solution, stirred for 5 minutes, ultrasonicated for 10 minutes, and stirred for another 5 minutes to obtain a composite sol, in which nano-SiO 2 The mass of the particles is 7.5% of the mass of the composite sol. The treated glass slide is dipped i...

Embodiment 2

[0026] Other conditions are the same as embodiment 1, only change nanometer SiO 2 The mass of the particles is 0% of the mass of the composite sol, that is, no nano-SiO is added 2 .

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Abstract

The invention discloses a preparation method of a super-amphiphobic coating, which comprises the following steps: preparing a fluorine-containing silane polymer solution; adding ethyl orthosilicate, water and hydrochloric acid into the fluorine-containing silane polymer solution to perform hydrolysis reaction to obtain a mixed solution; adding nano silicon dioxide into the mixed solution, and uniformly mixing to obtain a composite sol; and applying the composite sol on the substrate, curing and drying to obtain the super-amphiphobic coating. The cured superhydrophobic coating has the advantages of favorable hydrophobicity and oleophobicity, favorable mechanical properties, favorable heat resistance and favorable light transmittance.

Description

technical field [0001] The invention relates to the field of super-amphiphobic materials, in particular to a method for preparing a super-amphiphobic coating. Background technique [0002] In the long-term evolution of organisms in nature, the surfaces of many organisms (such as lotus leaves, rice leaves, cicada wings, and water strider legs) have superhydrophobic and self-cleaning effects. Through the study of these organisms, scientists found that this super-hydrophobic surface is mainly composed of materials with a certain roughness and low surface energy. At present, materials with such superhydrophobicity have been widely used in daily life. [0003] With the development of society, a single super-hydrophobic coating can no longer meet people's needs. However, there are few reports on super-oleophobic materials and the research is slow. It cannot be borrowed from nature like super-hydrophobic materials; the surface tension of oil and other organic substances is low, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/14C09D7/12C08F220/22C08F230/08
Inventor 王芳罗仲宽陈普奇洪英蕊逄艳
Owner SHENZHEN UNIV
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