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Reinforcement material for preservation of cultural relics, and preparation method and application thereof

A technology for the protection and reinforcement of cultural relics, which is applied in the field of non-cracking silicone protective agent and the protection and reinforcement of stone cultural relics. Large size, reduced stone anti-salt damage ability, etc., to achieve obvious reinforcement effect, superior performance, and improve the effect of anti-salt aging

Inactive Publication Date: 2013-07-31
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The more prominent problems that actually limit the application are: PMC protective agent has a great influence on the appearance and color of the stone matrix; the introduction of elastic chain segments reduces the ability of the stone to resist salt damage, causing deterioration
[0004] Chinese patent application 201110208130.0 discloses a nano-material for stone protective film and its preparation method. The material in this application uses PEO polyoxyethylene as a surfactant, hydrochloric acid or ammonia as a catalyst to prepare silica colloidal balls through solvent evaporation-induced self-assembly method (EISA ) preparation, the purpose of protection is achieved by forming a film on the surface of the stone, but it does not involve making the protective material enter the interior of the stone matrix to fill the pores to form a continuous gel network structure for reinforcement, nor does it mention the cracking modification and salt resistance of the material In addition, the materials prepared by this method need to use surfactants, and the catalysts used are hydrochloric acid or ammonia water, which have a certain corrosive effect on the cultural relics themselves.

Method used

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  • Reinforcement material for preservation of cultural relics, and preparation method and application thereof
  • Reinforcement material for preservation of cultural relics, and preparation method and application thereof

Examples

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Effect test

preparation example Construction

[0029] The preparation method and use method of the present invention comprise the following steps:

[0030] (1) Preparation of protective materials: Add nano-silica isopropanol sol, catalyst and water to an appropriate amount of tetraethyl orthosilicate for preliminary hydrolysis, then add polydimethylsiloxane, and stir magnetically at room temperature for 2-10 hours.

[0031] (2) Reinforcement process: Apply protective materials to stone cultural relics by dipping, spraying, brushing, etc., which can be performed multiple times depending on the actual situation. Place the finished stone samples in the air at normal temperature and pressure or in a constant temperature and humidity box for curing.

[0032] Firstly, the silicon dioxide nanoparticles are dispersed with isopropanol to form a uniform sol by ultrasonic dispersion. The size of the silicon dioxide nanoparticles can be 5-50 nanometers, preferably 10-20nm. The mass fraction of nano-silicon in the propanol sol is 0.5-...

Embodiment 1

[0047] 5g of silicon dioxide nanoparticles (nano-SiO 2 ) and 95g isopropanol to form a homogeneous sol, take 40g of this sol and mix it with 9g tetraethyl orthosilicate (TEOS), and ultrasonically disperse it for 10 minutes. Add 3 g of water and 0.09 g of DBTL dropwise, stir magnetically at 40°C for 4 h, add dropwise 0.45 g of hydroxyl-terminated polydimethylsiloxane (PDMS) and continue stirring for 1 h to obtain a translucent homogeneous solution. The mass ratio of TEOS, nano silicon oxide, and PDMS added is 100:22.2:5; the amount of water added is 3g, and the ratio of water to silicon (the molar ratio of tetraethylorthosilicate to water) is 4:1.

[0048] Use the red sandstone near the Dafo Temple in Shaanxi, cut and process it into two specifications of 2*2*2cm block and 4*4*1cm flake, ultrasonically clean with ethanol, and dry naturally. Immerse with the above protective agent, take it out and place it in a constant temperature and humidity box (SETH-Z-022R, ESPEC) to cure ...

experiment example 2

[0057] Example 1 was basically repeated, except that the amount of silicon dioxide nanoparticles in the component was 10% of that of tetraethyl orthosilicate. Microscopic observation shows that the surface of the sample is continuous without cracking, and nano-clusters are visible; the color difference value ΔE is 6.12, with a slight color change, showing a little whitening; the appearance of the sample changes little during the salt damage cycle, and the mass loss after 5 dry and wet salt cycles About 16%.

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Abstract

The invention relates to a reinforcement material for preservation of cultural relics, and a preparation method and an application thereof. The reinforcement material for the preservation of the cultural relics is an organic silicon composite material prepared by a sol-gel reaction by using tetraethoxysilane as a matrix, silicon dioxide nanoparticles and terminal-hydroxyl polydimethylsiloxane as terminal-hydroxyl polydimethylsiloxane modifiers, wherein the mass ratio of the tetraethoxysilane to the nanosized silicon dioxide and to the polydimethylsiloxane is 100 : (0-25) : (0-6).

Description

technical field [0001] The invention belongs to the technical field of cultural relics protection, and relates to a non-cracking organic silicon protective agent for reinforcement and protection of cultural relics and its performance, especially suitable for the protection and reinforcement of stone cultural relics. Background technique [0002] Stone cultural relics are an important part of cultural heritage. Due to their loose and porous structure, they are easily affected by water, salt, and wind in the environment. Therefore, protective materials with excellent performance are urgently needed for reinforcement and protection. Generally speaking, stone cultural relics protection materials are required to have low viscosity, good permeability, good weather resistance, good cohesion, adhesion and compatibility with the cultural relics substrate, certain reversibility, non-toxic, environmental Friendly, do not change the appearance of cultural heritage, consider possible pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/50C04B41/49
Inventor 黄晓罗宏杰刘溶
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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