Wall painting reinforcing material PAAG/Ca (OH) 2 and preparation method thereof

Abstract

The invention relates to a wall painting reinforcing material PAAG/Ca (OH) and a preparation method thereof. The method comprises the following steps: 1) preparing graphene oxide; (2) preparation of PAAG; (3) preparing nano Ca (OH) 2; (4) preparing a PAAG/Ca (OH) 2 compound; the preparation method has the beneficial effects that the synthesized polyacrylic acid functionalized graphene/nano Ca (OH) 2 (PAAG/Ca (OH) 2) has the advantages of relatively high compatibility, aging resistance, air permeability, easiness in carbonization, high adhesive force and the like, and has strong adhesiveness to a mural pigment; the nano composite material is dispersed into an alcoholic solution, so that the addition of salt ions in an aqueous solution is effectively reduced, the mural is greatly protected, the preparation and application shortages of a mural reinforcing composite material are filled up, and the nano composite material has important significance on the reinforcement and repair of the mural in China.

Description

technical field [0001] The invention relates to the technical field of mural protection materials, in particular to PAAG / Ca(OH), a reinforcement material for murals 2 and its preparation method. Background technique [0002] The research on reinforcement materials for murals has always been the focus and difficulty of cultural relics protection. The materials used in the reinforcement and repair of murals at home and abroad are mainly divided into two categories: inorganic materials and organic materials, and a lot of research has been done at home and abroad. Early J. E. Dutkiewicz Olkusz used the inorganic material limewater to reinforce the frescoes of Russian churches. P. Ropret et al. conducted UV aging experiments on AC33 and B-72 organic repair materials, and found that the color of the film did not change significantly after UV aging. In recent years, acrylic emulsion and silicone acrylic emulsion are also widely used in the protection, repair and reinforcement of...

AI Technical Summary

Problems solved by technology

However, the calcium hydroxide / graphene nanocomposites synthesized by this method are completely inorganic materials. Although most of the base materials of the murals are inorganic, the glue is organic, and the physical and chemical properties of the glue and most of the bases of the murals are different. There will be a phenomenon of aging out of sync. In the protection of cultural relics, reinforcement materials should focus on the comprehensive performance of materials, and fully combine the advantages of organic materials and inorganic materials.

[0004] The application number is: 201910262766.X, and the name is: Organic-inorganic composite material containing AC33 / nano-calcium hydroxide and its reinforcement method for the reinforcement of ancient murals. The disadvantage is that AC33 and nano-calcium hydroxide solids are dissolved in ethyl acetate solution In addition, simply mixing the two materials mechanically, the uniformity of the material cannot be guaranteed, which may cause a "small aperture" effect, which instead causes the water vapor exchange between the mural and the environment to form pore aggregation, resulting in secondary damage to the mural

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