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Hydrophilic stony cultural relic nano protective agent and preparation method thereof

A technology of stone cultural relics and protective agents, which can be applied to biocide-containing paints, anti-fouling/underwater coatings, anti-corrosion coatings, etc., and can solve problems such as poor compatibility, protective damage, and hindering the normal migration of water vapor

Active Publication Date: 2018-05-04
河南科斗新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For stone cultural relics, the usual method is to use surface hydrophobic polymer materials for treatment, but with the deepening of research on the protection of stone cultural relics, it is found that polymer cultural relic materials have poor compatibility with the cultural relics, which will block the gaps in the cultural relics and hinder Normal migration of water vapor, even protective damage

Method used

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  • Hydrophilic stony cultural relic nano protective agent and preparation method thereof
  • Hydrophilic stony cultural relic nano protective agent and preparation method thereof
  • Hydrophilic stony cultural relic nano protective agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The synthetic method of nano silicon dioxide is:

[0067] (1) Synthesis of star macromolecular initiator 21Br-β-CD:

[0068] Take 6.82g of β-cyclodextrin, dry it at 80°C for 12h under vacuum, then dissolve it in 60mL of N-methylpyrrolidone at room temperature, put it in an ice-water bath, and cool it down to 0°C. Under this condition, Add 58g of 2-bromoisobutyryl bromide dropwise within 2h. After the dropwise addition, warm up to room temperature and continue the reaction for 24h to obtain a brown solution. Concentrate by distillation under reduced pressure, add 100mL of dichloromethane to dilute, and wash with 100mL of saturated aqueous sodium bicarbonate solution and 100mL of deionized water were washed three times each, and the obtained organic phase was dried with anhydrous magnesium sulfate, then concentrated with a rotary evaporator, and finally precipitated in n-hexane below -20°C to obtain a white precipitate, which was dried in a vacuum oven for 50 Dry at ℃ fo...

Embodiment 2

[0084] A nano-silver synthesis method, the steps of which are similar to those of nano-silica, the difference being that the nano-silver is synthesized multi-arm star-shaped block copolymer β-CD-g-[PAA-b- PEG] and precursor AgNO 3 reaction, the steps are:

[0085] Dissolve 10 mg of multi-arm star-shaped block copolymer β-CD-g-[PAA-b-PEG] in 10 mL of DMF to make unimolecular micellar template solution; then add 58.9 mg of AgNO 3 And ethanol 2mL, at 100 ℃ for 10h, that is.

[0086] TEM images of silver nanoparticles figure 1 As shown, it can be seen that the size of the nanoparticles is uniform, and the average particle diameter is about 10 nm.

[0087] The solubility of silver nanoparticles in water was detected, and the results were as follows: figure 2 As shown, it can be seen that the silver nanoparticles prepared by the present invention have good solubility.

Embodiment 3

[0089] A nano-protective agent for hydrophilic stone cultural relics, comprising the following raw materials in parts by weight: 5 parts of nano-silica, 0.5 parts of nano-silver, 30 parts of propylene glycol, 5 parts of fluorine surfactant FC-4430, and a wetting agent 0.2 part of PE-100, 0.3 part of Nopco SN50400, 0.2 part of Nopco NXZ, 0.1 part of preservative CP-19, 58.7 parts of water.

[0090] The preparation method of described hydrophilic stone relics nano protective agent comprises the following steps:

[0091] (1) Dispersion: Add propylene glycol into the dispersion tank, add water-based wetting agent, water-based dispersant, water-based defoamer, and CP-19 preservative under stirring conditions, continue stirring at low speed for 10 minutes, and then add nanometer di Silicon oxide, nano-silver, and continue to stir for 30 minutes to obtain a nano-dispersion;

[0092] (2) Compounding: Add water into the stainless steel reaction kettle, add the fluorosurfactant into th...

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Abstract

The invention discloses a hydrophilic stony cultural relic nano protective agent and a preparation method thereof. The hydrophilic stony cultural relic nano protective agent is prepared from the following raw materials: nanosilicon dioxide, nano silver, propylene glycol, a fluorine surfactant, a water-based wetting agent, a water-based dispersing agent, a water-based defoaming agent, a preservative and water. The hydrophilic stony cultural relic nano protective agent can be bonded with a porous surface of a stony material, and a firm, durable, transparent, waterproof and oil-proof protective film is formed inside the surface of the stony material and is taken as a water-based permeable sealant for the porous surface of a cultural relic made from the stony material. The protective agent disclosed by the invention has excellent waterproof, antifouling and oil-proof properties, can effectively prevent the surface of the stony material from being polluted by foreign matters, and the surface can be cleaned easily; the protective agent has good air permeability, and steam is permeable; the protective agent has good weather resistance and uvioresistant function and can effectively preventthe surface of cultural relics such as the stony material and pottery from being weathered; and a coating is transparent, and appearance characteristics of the surface of the stony material are not changed.

Description

technical field [0001] The invention belongs to the field of protection of cultural relics, and in particular relates to a nano-protective agent for hydrophilic stone cultural relics and a preparation method thereof. Background technique [0002] Stone cultural relics refer to all cultural relics processed with natural stones as raw materials, which are basically divided into three categories: stone art cultural relics (there are Dunhuang Mogao Grottoes in my country, Yungang Grottoes in Datong, Shanxi, and Longmen Grottoes in Luoyang, Henan). , Dazu Rock Carvings in Chongqing, etc. are included in the World Cultural Heritage List), stone architectural relics, stone tools and utensils. Due to the long-term erosion of rain, snow, moisture, groundwater and soluble salt, the stone cultural relics and stone buildings preserved in the open air are seriously weathered, and many of them are in an endangered state. The restoration and protection of these cultural relics requires the...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/08C09D5/16C09D5/14
CPCC09D1/00C09D5/08C09D5/14C09D5/16C09D5/1656C09D5/1687
Inventor 裴东杰吴斌刘刚于航
Owner 河南科斗新材料研究院有限公司
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