Super-hydrophilic anti-fogging oxidized graphene coating, preparation method and application thereof

Abstract

The invention discloses a preparation method of a super-hydrophilic anti-fogging oxidized graphene coating. The preparation method comprises the following steps: taking graphene micro powder as a raw material, adopting a wet chemical oxidation method to prepare oxidized graphene dispersion liquid, and carrying out filtration, rinsing, ultrasonic dispersion and centrifugal separation to obtain the super-hydrophilic anti-fogging oxidized graphene coating. In addition, the invention further discloses a method of adopting the coating to prepare a super-hydrophilic anti-fogging oxidized graphene coating layer. The preparation method disclosed by the invention is simple in technology, low in cost, green and environment-friendly, and easy in operating condition control. The obtained oxidized graphene coating is excellent in performance, wide in application range, and capable of being applied to relatively transparent common glass or organic transparent carrier. The prepared super-hydrophilic anti-fogging oxidized graphene coating layer has the excellent characteristics of super-hydrophilicity, anti-fogging property, high strength, long durability, high transmission of light and the like. The preparation method of the super-hydrophilic anti-fogging oxidized graphene coating effectively solves the problem that the existing coating layer is poor in anti-fogging effect and durability, and is favorable to promote application and development of the super-hydrophilic technology.

Description

technical field

[0001] The invention relates to the technical field of coating materials, in particular to a superhydrophilic anti-atomization graphene oxide coating and a preparation method and application thereof. Background technique

[0002] The wettability of solid surfaces is very important for fundamental research and practical applications. In recent years, superhydrophilicity, as a very special phenomenon, has received extensive attention. Super-hydrophilic surface refers to the surface with a contact angle of less than 5° with water. It has excellent performance and is widely used. It can realize surface self-cleaning, improve surface heat exchange efficiency and other functions. In particular, since the superhydrophilic surface has a very small water contact angle, when moisture or steam condenses on its surface to form tiny water droplets, the tiny water droplets will quickly flatten, so as not to affect the mirror image, visibility and carrier. Anti-fog effect...

Examples

Embodiment 1

[0024] 1, the preparation method of a kind of superhydrophilic anti-atomization graphene oxide coating of the present embodiment, such as figure 1 As shown, the steps are as follows:

[0025] (1) be 325 purpose graphite micropowders with particle diameter as raw material, adopt Hummers method to prepare graphite oxide dispersion;

[0026] (2) Take 100ml of the above-mentioned graphite oxide dispersion, first add 100ml of deionized water to dilute, then filter and wash to neutrality, then ultrasonicate at 300W for 2 hours, and finally centrifuge at 15000 rpm for 2 hours, retain the upper layer liquid, Obtaining concentration is the superhydrophilic antifogging graphene oxide coating of 0.1mg / ml.

[0027] 2. If figure 1 As shown, the method for preparing the super-hydrophilic anti-fogging graphene oxide coating in the present embodiment is as follows: at 300 rpm and 3500 rpm, process for 20 seconds respectively by using the spin coating method. The above-mentioned graphene ox...

Embodiment 2

[0030] 1, the preparation method of a kind of superhydrophilic anti-atomization graphene oxide coating of the present embodiment, such as figure 1 As shown, the steps are as follows:

[0031] (1) be that 400 order graphite micropowders are raw material with particle diameter, adopt Staudenmaier method to prepare graphite oxide dispersion liquid;

[0032] (2) Take 200ml of the above-mentioned graphite oxide dispersion, first add 100ml of deionized water to dilute, then filter and wash to neutrality, then ultrasonicate at 600W for 1 hour, and finally centrifuge at 10000 rpm for 3 hours, retain the upper layer liquid, The super-hydrophilic anti-fogging graphene oxide coating with a concentration of 0.2 mg / ml was obtained.

[0033] 2. If figure 1 As shown, the method for preparing the super-hydrophilic anti-fogging graphene oxide coating in the present embodiment is as follows: at 350 rev / min and 4000 rev / min, process for 30 seconds respectively, The above-mentioned graphene ox...

Embodiment 3

[0036] 1, the preparation method of a kind of superhydrophilic anti-atomization graphene oxide coating of the present embodiment, such as figure 1 As shown, the steps are as follows:

[0037] (1) be 400 purpose graphite micropowders with particle diameter as raw material, adopt Brodie method to prepare graphite oxide dispersion;

[0038] (2) Take 50ml of the above-mentioned graphite oxide dispersion, first add 100ml of deionized water to dilute, then filter and wash to neutrality, then ultrasonicate at 300W for 2 hours, and finally centrifuge at 15000 rpm for 2 hours, retain the upper layer liquid, Obtaining concentration is the superhydrophilic antifogging graphene oxide coating of 0.1mg / ml.

[0039] 2. If figure 1 As shown, the method for preparing the super-hydrophilic anti-fogging graphene oxide coating in the present embodiment is as follows: at 250 rev / min and 3000 rev / min, process for 20 seconds respectively, The above-mentioned graphene oxide coating is coated on th...

technical field

[0001] The invention relates to the technical field of coating materials, in particular to a superhydrophilic anti-atomization graphene oxide coating and a preparation method and application thereof. Background technique

[0002] The wettability of solid surfaces is very important for fundamental research and practical applications. In recent years, superhydrophilicity, as a very special phenomenon, has received extensive attention. Super-hydrophilic surface refers to the surface with a contact angle of less than 5° with water. It has excellent performance and is widely used. It can realize surface self-cleaning, improve surface heat exchange efficiency and other functions. In particular, since the superhydrophilic surface has a very small water contact angle, when moisture or steam condenses on its surface to form tiny water droplets, the tiny water droplets will quickly flatten, so as not to affect the mirror image, visibility and carrier. Anti-fog effect...

Examples

Embodiment 1

[0024] 1, the preparation method of a kind of superhydrophilic anti-atomization graphene oxide coating of the present embodiment, such as figure 1 As shown, the steps are as follows:

[0025] (1) be 325 purpose graphite micropowders with particle diameter as raw material, adopt Hummers method to prepare graphite oxide dispersion;

[0026] (2) Take 100ml of the above-mentioned graphite oxide dispersion, first add 100ml of deionized water to dilute, then filter and wash to neutrality, then ultrasonicate at 300W for 2 hours, and finally centrifuge at 15000 rpm for 2 hours, retain the upper layer liquid, Obtaining concentration is the superhydrophilic antifogging graphene oxide coating of 0.1mg / ml.

[0027] 2. If figure 1 As shown, the method for preparing the super-hydrophilic anti-fogging graphene oxide coating in the present embodiment is as follows: at 300 rpm and 3500 rpm, process for 20 seconds respectively by using the spin coating method. The above-mentioned graphene ox...

Embodiment 2

[0030] 1, the preparation method of a kind of superhydrophilic anti-atomization graphene oxide coating of the present embodiment, such as figure 1 As shown, the steps are as follows:

[0031] (1) be that 400 order graphite micropowders are raw material with particle diameter, adopt Staudenmaier method to prepare graphite oxide dispersion liquid;

[0032] (2) Take 200ml of the above-mentioned graphite oxide dispersion, first add 100ml of deionized water to dilute, then filter and wash to neutrality, then ultrasonicate at 600W for 1 hour, and finally centrifuge at 10000 rpm for 3 hours, retain the upper layer liquid, The super-hydrophilic anti-fogging graphene oxide coating with a concentration of 0.2 mg / ml was obtained.

[0033] 2. If figure 1 As shown, the method for preparing the super-hydrophilic anti-fogging graphene oxide coating in the present embodiment is as follows: at 350 rev / min and 4000 rev / min, process for 30 seconds respectively, The above-mentioned graphene ox...

Embodiment 3

[0036] 1, the preparation method of a kind of superhydrophilic anti-atomization graphene oxide coating of the present embodiment, such as figure 1 As shown, the steps are as follows:

[0037] (1) be 400 purpose graphite micropowders with particle diameter as raw material, adopt Brodie method to prepare graphite oxide dispersion;

[0038] (2) Take 50ml of the above-mentioned graphite oxide dispersion, first add 100ml of deionized water to dilute, then filter and wash to neutrality, then ultrasonicate at 300W for 2 hours, and finally centrifuge at 15000 rpm for 2 hours, retain the upper layer liquid, Obtaining concentration is the superhydrophilic antifogging graphene oxide coating of 0.1mg / ml.

[0039] 2. If figure 1 As shown, the method for preparing the super-hydrophilic anti-fogging graphene oxide coating in the present embodiment is as follows: at 250 rev / min and 3000 rev / min, process for 20 seconds respectively, The above-mentioned graphene oxide coating is coated on th...

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