Graphene anticorrosion coating for photovoltaic device and preparation method

Abstract

The invention belongs to the technical field of preparation of anticorrosion coatings, and provides a graphene anticorrosion coating for a photovoltaic device and a preparation method. The method comprises the following steps: preparing a paraffin emulsion through paraffin; preparing graphene suspension through graphene; mixing the paraffin emulsion and the graphene suspension according to proportion; then adding a polyquaternium flocculating agent; then carrying out emulsion co-coagulation, extraction filtration and micro-crosslinking pelletizing to obtain a paraffin packing loaded with graphene; the paraffin packing loaded with the graphene is added to the coating before the coating is put into use, and the coating is put into use after being uniformly stirred; the coating is high in anticorrosion performance and applicable to the photovoltaic device. Compared with a traditional method, the preparation method has the advantages that the prepared graphene coating is outstanding in graphene dispersing uniformity, density and stability, good in anticorrosion effect, and stable in coating performance; moreover, the whole preparation process is simple, the raw material cost and the processing cost are low, and the method is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of anticorrosion coating preparation, and provides a graphene anticorrosion coating for photovoltaic equipment and a preparation method. Background technique [0002] In today's era of resource depletion, solar energy resources, as an emerging resource, have a particularly bright prospect for its promotion and application. The photovoltaic industry is rising rapidly under the circumstances of energy and environmental crises. Photovoltaic industry is an emerging industry in my country, and it is a high-tech and capital-intensive industry. Since the 21st century, my country's photovoltaic industry has developed rapidly. By 2008, my country's photovoltaic cell production accounted for about one-third of the world's total production. The development of photovoltaic equipment ranges from the production of silicon materials, silicon wafer processing, production of solar cells and components, and the corresponding...

AI Technical Summary

Problems solved by technology

Among them, Yu Haibin and others invented a preparation method of graphene-based anti-corrosion coatings (China Invention Patent Application No. 201710153171.1). Firstly, graphene oxide is dispersed in water or oily solvent by ultrasonic to obtain a pre-dispersion liquid; Add graphene, and then ultrasonically disperse the graphene oxide to absorb graphene and disperse the graphene evenly to obtain a composite dispersion; filter the composite dispersion to obtain a composite slurry; add the composite slurry to the water-based resin or oleoresin, and adding additives, stirring, to obtain graphene-based anti-corrosion coatings, but the preparation process of this method is complicated, and can not solve the problem of graphite dispersion

In addition, Hu Qihui and others invented a modified graphene and a coating containing the modified graphene (China Invention Patent Application No. 201610997544.9). In this method, graphene oxide is first added to an organic solvent, and after ultrasonic dispersion treatment, Then add glucose, polyvinylpyrrolidone and silane coupling agent, and stir for 10 to 20 minutes to obtain the initial mixed solution; then use an organic solvent to centrifugally wash the initial mixed solution, and the remaining solid matter obtained by centrifugal washing is the modified graphene, and then It can be used by adding paint, but the dispersion of this method is still insufficient, and it cannot be effectively used in photovoltaic equipment

[0005] It can be seen that there are graphene coatings in the prior art because graphene will produce self-agglomeration, destroying the uniformity and compactness of its dispersion, causing the defect that it is difficult to disperse when applying and coating, and the anti-corrosion effect and barrier performance of the coating cannot be guaranteed. There is no graphene anti-corrosion coating specially applied to photovoltaic equipment

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