Preparation method of graphene high-performance fireproof coating

Abstract

The invention discloses a preparation method of a graphene high-performance fireproof coating, and the graphene high-performance fireproof coating is prepared from the following main raw materials: a copolymer emulsion, ammonium polyphosphate, melamine, pentaerythritol, graphene oxide, a coalescing agent, a dispersing agent, a defoaming agent, a flatting agent, titanium dioxide, deionized water and the like. Compared with other preparation processes, the process is mature, Aa methacrylate-vinylidene chloride copolymer emulsion, melamine, ammonium polyphosphate, pentaerythritol and various assistants are adopted as raw materials, the coating is prepared under certain technological conditions, the technology for preparing the graphene high-performance fireproof coating by using the copolymer emulsion in a laboratory is completed, and through a multi-data contrast test, the good addition amount of the graphene oxide in the high-performance fireproof coating is obtained, the test work of the laboratory on the main performance of the graphene fireproof coating is completed, and the test result shows that the developed graphene fireproof coating is excellent in fireproof performance and has a very good fireproof effect.

Description

technical field [0001] The present invention relates to the preparation technology of fireproof paint, more specifically, relate to a kind of preparation method of graphene high-performance fireproof paint. Background technique [0002] Graphene is a two-dimensional sheet carbon nanomaterial composed of a layer of carbon atoms. It is a two-dimensional crystal composed of sp2 hybridized carbon atoms with a honeycomb molecular structure. It is combined with commonly used molecular sieves, montmorillonite, and hydrotalcite Compared with other materials, graphene has a super high specific surface area, the theoretical value is about 2600m2 / g and excellent electrical conductivity, thermal conductivity, heat resistance, mechanical strength, barrier property, and the arrangement of carbon atoms in graphene is similar to that of graphite single atom. The layer is also bonded with sp2 hybrid orbitals, and has the following characteristics: carbon atoms have 4 valence electrons, of wh...

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Problems solved by technology

[0003] Traditional graphene fire protection coatings have the following disadvantages in the preparation process: Graphene and graphene oxide nanoplatelets are available as powders and pastes that can be mixed with various liquids and polymers, this flexibility makes them suitable for various products It is an ideal additive and coating. The two-dimensional sheet structure of graphene can be superimposed layer by layer in the coating to form a dense physical isolation layer and improve the flame retardant performance. Graphene can be cross-linked and compounded with the resin in the coating to further form a dense layer. The protective film plays the role of blocking air, so as to exert the effect of flame retardancy. At high temperature, the graphene coating burns to produce carbon dioxide and water, and forms a denser and continuous carbon layer, which has a stronger barrier effect, but pure graphite It is difficult to get a good dispersion of graphene in polymer film-forming substances, which will seriously affect its modification effect on polymers, especially the flame retardant effect of materials, so before preparing nanocomposites, it is necessary to functionalize graphene Chemical treatment or direct use of graphene oxide to improve its dispersion and other treatments. Graphene oxide has the same two-dimensional sheet molecular structure as graphene, but there are many epoxy groups, hydroxyl groups, carboxyl groups and carbonyl groups on the edges and surfaces. Polar functional groups, these groups improve the compatibility of graphene oxide and polar polymer film-forming substances, thereby improving the modification effect on polymers, so it is highly feasible to use graphene oxide in fire-resistant coatings To this end, we propose a method for preparing graphene high-performance fire-resistant coatings

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