Flexible geopolymer-based anticorrosive paint and preparation method and application thereof

Abstract

The invention belongs to the technical field of anticorrosive paint and discloses flexible geopolymer-based anticorrosive paint and a preparation method and application thereof. The flexible geopolymer-based anticorrosive paint comprises a component A, a component B and a component C. The component A is prepared from, by weight, 15-80 parts of a geopolymer gel base material and 20-85 parts of pigments and fillers. The component B is prepared from, by weight, 40-85 parts of an alkali activator, 0-15 parts of a curing regulator, 0-6 parts of a rheological modifier and 7-45 parts of water. The component C refers to a functional toughening additive. The lexible geopolymer-based anticorrosive paint has advantages that defects of high brittleness and proneness to cracking failure of traditionalpolymer paint are overcome, and excellent flexibility of a material is achieved; in addition, the paint contains zero VOC and is low in toxicity and environmentally friendly, a coating is compact andstable, excellent corrosion resistance, permeation resistance and durability are achieved, and the flexible geopolymer-based anticorrosive paint is applicable to steel structure and concrete surface protection of infrastructures of cultural relics, buildings, municipal administration, roads, subways and the like.

Description

technical field [0001] The invention belongs to the field of inorganic anticorrosion coatings, in particular to a flexible geopolymer-based anticorrosion coating and its preparation method and application. Background technique [0002] Geopolymer is a new type of water-based inorganic gel material produced by the reaction of solid aluminosilicate and high-concentration alkali solution. As an inorganic material, geopolymers have a unique polymer-like bonded structure. The difference is that polymer materials are connected to each other by C-C bonds, while geopolymers are connected to each other by Si-O bonds or Al-O bonds to form a tetrahedral structure. Therefore, geopolymer has the advantages of both inorganic materials and polymer materials. It has a dense molecular structure and good corrosion resistance; it has high mechanical strength, good heat resistance, and has excellent compatibility with concrete, stone, ceramics and other substrates. Excellent bonding ability; ...

AI Technical Summary

Problems solved by technology

However, traditional toughening modification methods (aqueous emulsion toughening, cellulose toughening, etc.) simply physically blend flexible organic polymer materials with geopolymers, and cannot change the properties of geopolymers at the molecular level. structure, it is difficult to fundamentally improve the brittleness of the geopolymer; and the addition of toughening materials also hinders the formation of the tetrahedral structure of the geopolymer SiAl

Finally, although the toughness of the modified geopolymer has been improved to a certain extent, its mechanical strength will also be greatly reduced, which has obvious shortcomings.

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