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Super-hydrophilic anti-fog coating as well as preparation method and application thereof

An anti-fog coating, super-hydrophilic technology, applied in the coating, metal material coating process, ion implantation plating, etc., can solve the problems of titanium dioxide coating application limitations, etc., achieve good application prospects, long anti-fog time , highly controllable effect

Active Publication Date: 2020-04-24
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this super-hydrophilic anti-fog effect can only last for a few hours to a week or so. After losing the ultraviolet light, it returns to the hydrophobic state. Frequent use of ultraviolet light to maintain its hydrophilicity makes the application of titanium dioxide coatings restricted. Therefore, it is particularly important to develop an inorganic coating that can maintain a super-hydrophilic anti-fog effect under visible light.

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  • Super-hydrophilic anti-fog coating as well as preparation method and application thereof
  • Super-hydrophilic anti-fog coating as well as preparation method and application thereof
  • Super-hydrophilic anti-fog coating as well as preparation method and application thereof

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[0028] Another aspect of the embodiments of the present invention also provides a method for preparing a super-hydrophilic anti-fog coating, which includes: at least using any one of the physical vapor deposition method, the sol-gel method, and the plasma-enhanced chemical vapor deposition method photocatalytically active TiO 2 Elemental doping is performed to deposit a super-hydrophilic anti-fog coating on the substrate.

[0029] Further, the doped elements include any one or a combination of metal elements and non-metal elements, and are not limited thereto.

[0030] Furthermore, the elements to be doped include any one or a combination of two or more of N, C, S, F, Fe, Cr, Ni, Cu, and are not limited thereto.

[0031] Further, the element doping includes single element doping or multi-element co-doping.

[0032] In some more specific embodiments, the method includes: placing the substrate in a vacuum chamber of a film coating equipment, and then sputtering a Ti target in ...

Embodiment 1

[0051] The N-doped TiO of this embodiment 2 A superhydrophilic anti-fog coating was prepared on a glass substrate by physical vapor deposition, and the N-doped TiO 2 The total thickness of the superhydrophilic anti-fog coating is about 100 nm.

[0052] The N-doped TiO 2 The superhydrophilic anti-fog coating can be prepared according to the following steps:

[0053] (1) Cleaning, degreasing, and surface activation treatment of the glass substrate: firstly, the glass substrate is cleaned and degreased with solvents such as ethanol and acetone, and then placed in the vacuum chamber of the reactive magnetron sputtering equipment, and the Vacuumize the vacuum chamber of the above-mentioned coating equipment, then raise the temperature in the vacuum chamber to 100°C, and pass in argon gas, turn on the ion beam, the ion beam voltage is 1300V, increase the gas ionization rate, and apply - 400V bias voltage to guide argon ions to bombard and activate the metal surface;

[0054] (2)...

Embodiment 2

[0057] The N-C co-doped TiO of the present embodiment 2 A superhydrophilic anti-fog coating was prepared on a glass substrate by physical vapor deposition, and the N-C co-doped TiO 2 The total thickness of the superhydrophilic anti-fog coating is about 150nm.

[0058] The N-C doped TiO 2 The superhydrophilic anti-fog coating can be prepared according to the following steps:

[0059] (1) Cleaning, degreasing, and surface activation treatment of the glass substrate: firstly, the glass substrate is cleaned and degreased with solvents such as ethanol and acetone, and then placed in the vacuum chamber of the reactive magnetron sputtering equipment, and the Vacuumize the vacuum chamber of the above-mentioned coating equipment, then raise the temperature in the vacuum chamber to 100°C, and pass in argon gas, turn on the ion beam, the ion beam voltage is 1300V, increase the gas ionization rate, and apply - 400V bias voltage to guide argon ions to bombard and activate the metal surf...

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Abstract

The invention discloses a super-hydrophilic anti-fog coating as well as a preparation method and application thereof. The coating is composed of TiO2 with photocatalytic activity and doping elements,wherein the doping elements comprise metal elements and / or non-metal elements. According to the coating, the TiO2 with photocatalytic properties is subjected to metal and / or non-metal doping to reducethe forbidden bandwidth of the TiO2 so as to realize visible light-induced super-hydrophilic antifogging; the element-doped TiO2 super-hydrophilic anti-fog coating has the advantages of good bindingforce, high transparency, long anti-fog time, good anti-fog effect and the like, the contact angle between the surface of the obtained coating and water is less than 5 degrees, the super-hydrophilicity is still good after the coating is placed for 3 months, and the contact angle between the coating and water is still smaller than 10 degrees and the light transmittance is 85-92% after the coating rubs with a rubbing pin which is 10mm in diameter and wrapped with a dust-free cloth for 500 times under the friction conditions that a load is 1kg and a stroke is 5mm; and meanwhile, the preparation method is simple and easy to implement, the controllability is high, the cost is low, batch production can be achieved, and good application prospects are realized in the field of transparent base material antifogging.

Description

technical field [0001] The invention belongs to the field of surface anti-fog, and in particular relates to a super-hydrophilic anti-fog coating and a preparation method and application thereof. Background technique [0002] Transparent materials (such as glass, plastic) are widely used in industrial and agricultural production, daily life and military fields, such as goggles, laser protective glasses, telescopes and lenses of various camera equipment, observation windows of various machinery, sports Diving goggles, bathroom glass, chemical or biological protective masks, vehicle windshields and rearview mirrors, EOD treatment protective equipment, helmets, solar panels, observation windows for measuring instruments, glass covers, glass walls for greenhouses, etc. However, glasses will make us "see flowers in the fog" when we breathe out in winter; in cold winter, the fogging on the surface of the windshield will greatly affect our visibility and even cause accidents. The p...

Claims

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Application Information

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IPC IPC(8): C23C14/08C23C14/35C23C18/12C23C16/40C23C16/50
CPCC23C14/083C23C14/35C23C14/0036C23C14/352C23C18/1216C23C18/1254C23C16/405C23C16/50
Inventor 马付良曾志翔王刚汤磊
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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