Inorganic sol-type cultural relic reinforcement composite material imitating natural silica-alumina gel and its usage

Abstract

Inorganic sol-type cultural relics reinforcement composite materials imitating natural silica-alumina gel and its application include water-dispersed alkaline silica sol, water-dispersed aluminum sol and stannous aqueous solution. The water-dispersed alkaline silica sol is mixed with tetraethyl orthosilicate and deionized water, and the pH value is adjusted to 10; the water-dispersed aluminum sol is mixed with aluminum isopropoxide and deionized water, and the pH value is adjusted to 4, and heated , after centrifuging and washing, acidify and degullify to obtain water-dispersed aluminum sol; the stannous aqueous solution is mixed with citric acid and stannous chloride, then trisodium citrate and stannous chloride are mixed to obtain an intermediate liquid, and then the intermediate liquid is added drop by drop Slowly add sodium carbonate aqueous solution and stir to obtain a colorless and transparent stannous aqueous solution. The present invention solves the problem that crispy powder is easily damaged due to the aging of cultural relics, improves the strength of cultural relics, maintains the long-term stability of cultural relics materials, matches the aging properties of reinforcement materials with inorganic cultural relics, and can quickly reinforce during the excavation process Assist in the excavation and extraction of crisp powder cultural relics.

Description

technical field [0001] The invention relates to a cultural relic reinforcement composite material. In particular, it relates to an inorganic sol-type cultural relic reinforcement composite material imitating natural silica-alumina gel and its usage. Background technique [0002] Cultural relics are historical witnesses of social progress, have important use value for historical research, are the crystallization of wisdom of human society at various stages of social development, and have important scientific value for research on the development of human society. With the improvement and development of archaeological technology, the excavation of cultural relics and the extraction of value information carried by cultural relics are becoming more and more important. Cultural relics, especially unearthed cultural relics, have gone through thousands to hundreds of years of natural corrosion and aging process, the mechanical strength of materials has decreased, and some material...

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Problems solved by technology

[0004] At present, the mainstream reinforcement materials for cultural relics are mainly organic materials. In the early stage of cultural relics protection, oil, wax, 502 glue, etc. were used as reinforcement bonding materials for crisp powder cultural relics, which brought serious discoloration, deformation and degradation problems. Epoxy resins, polyurethane resins, acrylic emulsions, silicone resins, organic fluorine resins, etc. are often used for site protection in archaeological sites for penetration reinforcement, but because the inorganic cultural relic materials are mainly silicates, they are extremely mismatched with the bonding materials , and the penetration depth is insufficient, the reinforcement effect only acts on the surface 1-2 cm, and the cultural relics reinforced by the well are prone to secondary fracture due to vibration. The fracture, the part wetted by the adhesive will completely lose its original appearance as the material ages

Inorganic reinforcement materials were mainly lime water and barium hydroxide in the early days. Due to the extremely low concentration of effective substances in aqueous solution, slow onset of action and serious secondary salt damage, recently developed nano-Ca( Oh) 2 , Mg(OH) 2 、Ba(OH) 2 , metal alkoxide, nano-apatite and other new cultural relic reinforcement nanomaterials, but the alcohol solution is highly volatile, which affects the penetration depth, and the toxicity of metal alkoxide is ubiquitous. The reinforcement reaction is greatly affected by the environment, and the effect is slow

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