Organic gel with nondestructive residue detection function for removing organic polymers on surface of mural and preparation and use methods thereof

Abstract

The invention relates to an organic gel with a nondestructive residue detection function for removing organic polymers on the surface of a mural and preparation and use methods thereof. Graphene quantum dots, nano calcium hydroxide and epoxy resin are added into an ethyl acetate solution to prepare the organic polymer cleaning gel. The graphene quantum dots can emit green fluorescence under ultraviolet irradiation, so that after the gel is applied to removal of polyacrylic resin, polyvinyl butyral and polyvinyl acetate on the surface of a mural, an ultraviolet lamp is utilized to irradiate the surface of the mural, and whether the gel is left on the surface of the mural or not is judged by observing whether there is green fluorescence or not. According to the method, nondestructive detection is achieved, damage to a mural caused by destructive detection of an existing infrared spectroscopy method is overcome, weak green fluorescence can be emitted from the surface of the mural when the mural is irradiated by ultraviolet light after the organic matters on the surface of the mural are removed, and gel residues can be completely removed by simply wiping the mural with a cotton swab according to the light-emitting position. The gel has an excellent industrial production prospect.

Description

technical field [0001] The invention belongs to the technical field of ancient mural protection materials and the field of mural surface restoration, and relates to an organogel for removing organic polymers on the mural surface with the function of non-destructive detection residue and a preparation method thereof. Background technique [0002] Organic polymers such as polyacrylic resin, polyvinyl butyral, polyvinyl acetate, etc. are the most widely used reinforcement and protection materials for murals in the world. These polymers have strong adhesion, simple construction, and do not affect the color of murals (Yang Lu. Research on photoaging modification of commonly used organic polymer cultural relic protection materials [D]. Northwest University, 2006), however, they are easy to age and turn yellow, become brittle, which eventually leads to a loss of its mechanical properties; thus requiring secondary reinforcement. Before reinforcement, it is necessary to remove the a...

AI Technical Summary

Problems solved by technology

[0003] From the perspective of the current material development, the methods for removing organic polymers on the surface of murals are: (1) apply absorbent cotton dipped in ethyl acetate, however, this method is inefficient, poor in effect and must be very careful otherwise it is easy to damage the mural; (2) ) uses microemulsions, which contain cleaning agents such as ethyl acetate. The microemulsions have excellent cleaning effects and high efficiency. The disadvantage is that there are a lot of water and surfactants in the system, which can easily cause secondary damage to murals (Adv .Colloid.Interface Sci.2014,205,361-371); (3) Utilize organic gel, organic gel does not contain water and surfactant and has good cleaning effect, high removal rate of organic matter (above 80%)

It should be pointed out that the gel will remain on the surface of the mural while removing the organic matter, and the current method for detecting the residue is to use an infrared spectrometer, which is a destructive test (Appl. Phys. A 2015, 121, 857-868), and even if it is detected There are residues, which are difficult to remove completely because they are microscopic