Super-hydrophobic wear-resistant graphene composite coating and solar collector tube using the same

Abstract

The invention discloses a super-hydrophobic wear-resistant graphene composite coating and a solar collector tube using the same. The super-hydrophobic wear-resistant graphene composite coating is formed by performing ultraviolet light curing on composite paint of graphene oxide and photocatalytic active nanoparticle titanium dioxide; the solar collector tube comprises a glass outer tube and a metal inner tube sleeved thereby, an airtight cavity is formed between the glass outer tube and the metal inner tube, the inner wall and the outer wall of the o glass outer tube are separately coated withanti-reflection coatings, and the outside of each of the anti-reflection coatings is coated with the super-hydrophobic wear-resistant graphene composite coating; and through physicochemical properties of graphene and titanium dioxide itself such as hydrophobicity and light transmittance, the solar collector tube coated with the same has the advantages of strong wear resistance, strong weather resistance, strong light transmittance and good self-cleaning capability, can effectively resist erosion of the collector tube by dust, and is suitable for desert areas with abundant light resources.

Description

technical field [0001] The invention relates to a superhydrophobic wear-resistant graphene composite coating and a wear-resistant self-cleaning solar heat collecting tube using the coating. Background technique [0002] The use of solar thermal power generation technology avoids the expensive silicon crystal photoelectric conversion process, which can greatly reduce the cost of solar power generation. Using a large-scale array of parabolic or dish mirrors to collect solar thermal energy, providing steam through heat exchange devices, combined with traditional turbogenerator technology, so as to achieve the purpose of power generation. Solar thermal power generation systems generally include four subsystems: heat collection system, steam generation system, power generation system and heat storage system. Sunlight gathers on the heat collecting tube to heat the medium in the tube, and then the heat exchange medium heated to nearly 400 degrees passes through the heat exchanger...

AI Technical Summary

Problems solved by technology

[0003] Problems with heat collecting tubes: (a). According to the experience of the actual working environment of vacuum heat collecting tubes at home and abroad, wind and sand are the most important factors that cause the transmittance of the glass outer tube of heat collecting tubes to decay

Titanium dioxide photocatalytic technology has a good ability to decompose and clean organic matter, but it has a weak ability to clean sand and dust

[0005] The heat collector tube glass is not resistant to sand and dust impact: adding a protective sleeve is a solution, but the impact resistance and light transmittance of the protective sleeve itself are poor, resulting in poor practicability

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