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Anti-ultraviolet graphene coating with hierarchical pore structure, anti-ultraviolet material and preparation method thereof

A porous graphene and graphene technology, applied in graphene, coatings, chemical instruments and methods, etc., can solve the problems such as affecting graphene's UV-proof functionality, graphene content should not be too high, and use scope limitations, etc. Promote adsorption deposition, prevent excessive stacking and agglomeration, improve the effect of scattering

Active Publication Date: 2021-08-31
广东极客亮技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since graphene is at the nanoscale, it is easy to agglomerate, which seriously affects the performance of graphene's UV protection function.
Some studies have directly prepared graphene into a dispersion liquid for storage, but the scope of use is limited, and the graphene content in the dispersion liquid should not be too high

Method used

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  • Anti-ultraviolet graphene coating with hierarchical pore structure, anti-ultraviolet material and preparation method thereof
  • Anti-ultraviolet graphene coating with hierarchical pore structure, anti-ultraviolet material and preparation method thereof
  • Anti-ultraviolet graphene coating with hierarchical pore structure, anti-ultraviolet material and preparation method thereof

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preparation example Construction

[0043] A kind of preparation method of graphene anti-ultraviolet material, comprises the following steps:

[0044] S1. Add the above-mentioned porous graphene nanosheets and sodium bicarbonate into the dispersion solvent according to the mass ratio of 1:2-4, and ultrasonically disperse evenly to obtain a dispersion liquid with a graphene mass fraction of 30%-40%;

[0045] S2. Use polystyrene or polyaniline to modify the surface of the substrate to be coated, then immerse the modified substrate in the dispersion obtained in step S1, and then slowly add Dilute hydrochloric acid, after self-assembling one layer of pore diameter on the surface of the substrate is an anti-ultraviolet graphene coating with a hierarchical porous structure of 20-100nm and a thickness of 100-200nm, the substrate is taken out;

[0046] S3. Use deionized water to clean the surface of the substrate taken out in step S2, and then dry to obtain the graphene UV-resistant material. In this process, since the...

Embodiment 1

[0053] This embodiment provides a kind of anti-ultraviolet graphene coating of multi-level hole structure and the anti-ultraviolet material comprising this coating, please refer to figure 2 Shown, the anti-ultraviolet graphene coating of described hierarchical porous structure comprises aperture is 5-20nm, lateral size is the porous graphene nanoplatelet of 15-80nm, and the interlaced formation aperture between described porous graphene nanoplatelet is Anti-ultraviolet graphene coating with a hierarchical porous structure of 40-60nm and a thickness of about 120nm. It can be seen from conflict 2 that the porous graphene nanosheets in this embodiment are interlaced to form a coating with a pore diameter of about 40-60 nm, and the dispersion is relatively uniform.

[0054] In this example, the porous graphene nanosheets can be commercially available or self-made.

[0055] Homemade porous graphene nanosheets can be prepared by the following methods:

[0056] (1) Ultrasonic disp...

Embodiment 2

[0067] A graphene anti-ultraviolet material, compared with Example 1, the difference is that in step S2, the polystyrene is replaced by polyaniline. Others are substantially the same as in Embodiment 1, and will not be repeated here.

[0068] The average value of the ultraviolet protection factor (UPF) of this embodiment is 750, the ultraviolet light transmittance T (UVA) is 1.24%, and T (UVB) is 0.06%.

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Abstract

The invention provides an anti-ultraviolet graphene coating with a multi-level hole structure, an anti-ultraviolet material and a preparation method thereof. In the present invention, porous graphene nanosheets with a pore diameter of 5-20nm and a lateral dimension of 15-80nm are assembled into an anti-ultraviolet graphene coating with a pore diameter of 20-100nm and a thickness of 100-200nm. The anti-ultraviolet material of the present invention first uses polystyrene or polyaniline to modify the surface of the substrate, and then immerses it in a graphene dispersion containing sodium bicarbonate, and then drops dilute hydrochloric acid; during this process, the graphene Adsorbed on the surface of the modified substrate, while the CO produced by the metathesis of sodium bicarbonate 2 Promote the formation of a porous structure between the graphene nanosheets; finally take out the substrate and clean the surface to obtain a graphene UV-resistant material. The invention forms a multi-level hole structure through the nano-aperture of the nano-sheet itself and the pores between the nano-sheets, which has a significant shielding effect on ultraviolet rays.

Description

technical field [0001] The invention relates to the technical field of UV-resistant functional materials, in particular to a UV-resistant graphene coating with a multi-level pore structure, an UV-resistant material and a preparation method thereof. Background technique [0002] In recent years, people have gradually realized that ultraviolet rays may cause various harms to human health. Therefore various anti-ultraviolet protective products are more and more favored by consumers in general, such as anti-ultraviolet cosmetics, skin care products, textiles, doors and windows, car glass and other products. [0003] UV shielding agents can generally be divided into two categories, one is organic UV absorbers, mainly including benzophenones, benzotriazoles, salicylates, oxalanilides, etc. They all contain hydroxyl groups in their structure, which can absorb energy and convert it into heat energy in the process of forming stable hydrogen bonds and hydrogen bond chelating rings. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00D06M15/233D06M11/74D06M15/61C01B32/19B82Y40/00D06M101/06D06M101/32
CPCB82Y40/00C01B2204/20C01B2204/32C09D1/00C01B32/19D06M11/74D06M15/233D06M15/61D06M2101/06D06M2101/32D06M2200/25
Inventor 曾伟荣曾伟城
Owner 广东极客亮技术有限公司
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