A kind of recoatable antireflective superhydrophobic coating and its preparation method and application

A super-hydrophobic coating and recoating technology, applied in the coating and other directions, can solve the problems that the surface cannot adhere to the super-hydrophobic coating, the coating cannot be applied to the surface, and the film-forming property of the super-hydrophobic coating is poor, and the anti-reflection effect is remarkable. , strong activity, low cost effect

Active Publication Date: 2021-06-01
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there are three important shortcomings in obtaining super-hydrophobic coatings at present: one is that although the coatings obtained by spraying method have good hydrophobicity, their transparency is extremely low, and the light transmittance is generally lower than 50%; Although the transparency of the superhydrophobic coating obtained by this method is improved compared with spray coating, the overall transparency is still reduced by about 10%, and dip coating will lead to poor film-forming properties of the superhydrophobic coating, resulting in coffee ring effect
The third is that the existing super-hydrophobic coatings usually cannot be recoated. The surface of a general material can only be dipped once, and the second dipping will cause the coating to fail to be applied to the surface. This is mainly because the free The low surface energy substances modify the surface of the substrate, making the surface unable to adhere to the superhydrophobic coating

Method used

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  • A kind of recoatable antireflective superhydrophobic coating and its preparation method and application
  • A kind of recoatable antireflective superhydrophobic coating and its preparation method and application
  • A kind of recoatable antireflective superhydrophobic coating and its preparation method and application

Examples

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Effect test

Embodiment 1

[0039]The preparation method of the chain-type nano-silica sol in this example is as follows: (1) Synthesis of nano-chain seeds, adding 0.5 parts by mass of L-arginine to 40 parts by mass of deionized water and 3 parts by mass of tetraethyl orthosilicate ester mixture, and then reflux and stir the mixture overnight at a speed of <100 rpm and a temperature of 60°C in a reactor equipped with a reflux device to obtain a nanochain seed solution; (2) for nanochain growth, 0.3 mass Parts of L-arginine were added to the mixture of 6 parts by mass of the above-mentioned nanochain seed solution, 6 parts by mass of deionized water and 70 parts by mass of ethanol, and then stood at a constant temperature of 60°C for 12 h to obtain the nanochain solution; (3) Nanochain To set the shape, 1 mass part of tetraethyl orthosilicate was added to the above-mentioned nano-chain solution, and then stirred at 60° C. for 10 h at 600 rpm to obtain the chain-type nano-silica sol. The surfactant is weak...

Embodiment 2

[0044] A kind of preparation method of recoatable antireflection superhydrophobic coating comprises the following steps: step 1. add 30 mole parts ethanol in reaction container, then add 0.1 mole part chain nano-silica sol, stir 5 min at room temperature , with a rotating speed of 100 r / min, to obtain solution A, wherein the preparation method of chain nano-silica sol is as follows: (1) Synthesis of nano-chain seeds, adding 0.05 parts by mass of L-arginine to 40 parts by mass of deionized In a mixture of water and 3 parts by mass of tetraethyl orthosilicate, then the mixture is refluxed and stirred overnight at a speed of <100 rpm and a temperature of 60° C. in a reactor equipped with a reflux device, to obtain a nanochain seed solution; (2) For nanochain growth, add 0.2 parts by mass of L-arginine to the mixture of 6 parts by mass of the above-mentioned nanochain seed solution, 6 parts by mass of deionized water and 60 parts by mass of ethanol, and then let it stand at a const...

Embodiment 3

[0051] A kind of preparation method of recoatable super-hydrophobic coating of anti-reflection, comprises the following steps: step 1. add 60 mole parts ethanol in reaction vessel, then add 3 mole parts chain nano-silica sol, stir 30 min at room temperature , with a rotating speed of 600 r / min, to obtain solution A, wherein the preparation method of chain-type nano-silica sol is as follows: (1) Synthesis of nano-chain seeds, adding 1 mass part of L-arginine to 50 mass parts of deionized In a mixture of water and 5 parts by mass of tetraethyl orthosilicate, then the mixture is refluxed and stirred overnight at a speed of <100 rpm and a temperature of 60° C. in a reactor equipped with a reflux device, to obtain a nanochain seed solution; (2) For nanochain growth, add 0.5 parts by mass of L-arginine to a mixture of 8 parts by mass of the above-mentioned nanochain seed solution, 8 parts by mass of deionized water and 70 parts by mass of ethanol, and then stand at a constant tempera...

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Abstract

A recoatable and antireflection superhydrophobic coating and its preparation method and application belong to the field of material surface treatment. The preparation method is as follows: mix ethanol and chain-type nano-silica sol to obtain solution A; mix ethanol and tetraethyl orthosilicate, add ammonia and stir, then age, then add tetraethyl orthosilicate and stir to obtain a solution B: Mix solution A and solution B and stir to obtain solution C; add modifier and surfactant to solution C and stir to obtain super-hydrophobic coating, and use activated molecular sieve to remove water. The preparation process of the invention is simple, and the preparation process is environmentally friendly and pollution-free. The prepared coating can be dip-coated many times. The coating has good film-forming properties, high light transmittance, fast drying, and good super-hydrophobic effect. It can be used for automotive rearview mirrors, automotive windshields, electronic product glass, architectural glass, solar energy Battery glass, clothing, shoes and other occasions make the coated substrate have multiple functions such as waterproof, anti-fog, anti-fouling, self-cleaning and so on.

Description

technical field [0001] The invention belongs to the field of material surface treatment, and relates to a recoatable and antireflective superhydrophobic coating, a preparation method and application thereof. Background technique [0002] Superhydrophobic surfaces have special abilities such as self-cleaning, defrosting, anti-icing, and non-uniform wettability, so they have been extensively studied by many domestic and foreign scholars in recent years. At present, the main preparation method of superhydrophobic coatings is the sol-gel method. Superhydrophobic coatings are obtained by modifying nanoparticles with low surface energy substances, and superhydrophobic coatings with micro-nano composite structures are obtained by spraying or dipping. [0003] However, there are three important shortcomings in obtaining super-hydrophobic coatings at present: one is that although the coatings obtained by spraying method have good hydrophobicity, their transparency is extremely low, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/63C09D7/65
CPCC09D1/00C09D7/63C09D7/65
Inventor 张友法程真余新泉
Owner SOUTHEAST UNIV
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