Method for modifying graphene based on carbene and preparation method of graphene-doped anticorrosion coating

Abstract

The invention discloses a method for modifying graphene based on carbene and a preparation method of a graphene-doped anticorrosion coating. The method comprises the following steps: adding a diaziridine compound in dichlorotoluene for a reaction shielded from light, stirring the materials and uniformly mixing the materials to obtain a dichlorotoluene solution of the diaziridine compound; adding graphene in the dichlorotoluene solution of the diaziridine compound, reacting the materials through an ultraviolet photoreactor, performing oil-bath heating on the reacted solution, and stirring the materials; performing vacuum pumping filtration on the reacted solution, using deionized water and ethanol and respectively cleaning the materials and performing pumping filtration to obtain filter cake, performing vacuum drying and grinding on the cleaned filter cake at room temperature to obtain the modified graphene. The reaction performance of a carbene compound and strong nonsaturated double bond on the surface of graphene, and a reaction is generated to generate a cyclic compound and covalent modification on the surface of the graphene is realized.

Description

technical field [0001] The invention belongs to the field of materials, and particularly relates to a method for modifying graphene, and a method for preparing a doped anti-corrosion coating using the modified graphene obtained by the method. Background technique [0002] In recent years, graphene has become a "star material" in metal anti-corrosion coatings of global concern. Doping graphene into the organic anti-corrosion coating can play the role of graphene's "labyrinth" physical barrier to build an isolation layer between the medium and the substrate, which greatly improves the corrosion resistance of metals. However, the research and application of graphene in the field of metal anticorrosion has just started, and there are still many challenges, such as how to uniformly disperse graphene in organic coatings and easy agglomeration of graphene materials. [0003] At present, covalent modification on graphene surface is an effective method to improve the dispersion of g...

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Problems solved by technology

But doing so will bring two problems: one is that covalent modification often links compounds through functional groups such as hydroxyl (-OH) and carboxyl (-COO), and graphene oxide (GO) needs to be used because graphene oxide is more complex than graphite. There are more functional groups such as hydroxyl (-OH) and carboxyl (-COO) on the surface of alkene (GR), which is convenient for covalent modification

(Li Y, Yang Z, Qiu H, Dai Y, Zheng Q, Li J, Yang J.J.Mater.Chem.A, 2014, 2(34):14139.) But this method is mainly to coat graphite through coupling agent The surface of graphene affects the special properties of graphene surface to a certain extent

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