Antibacterial solidifying agent of excavated bamboo and wood ware

A solidifying agent, bamboo and wood technology, applied in the direction of wood processing equipment, wood impregnation, impregnated wood, etc., can solve the problems of environmental pollution, poor durability, affecting the texture of ancient wood, etc.

Inactive Publication Date: 2010-07-07
浙江省博物馆 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing method is to adopt 50%~70% polyethylene glycol (PEG) 2000~6000 aqueous solution heat-soaked saturated bamboo wood, because bamboo wood and PEG all are weakly acidic and are the nutrient source of some harmful microorganisms, The commonly used anti-mold and anti-corrosion method is to add synthetic inorganic antibacterial agents such as borax, boric acid, copper chromium boron (CCB) or synthetic organic antibacterial agents such as isothiazoles, imidazoles, and dimethylurea to the PEG solution. The pH of urea and the like is alkaline, and has a certain degradation effect on bamboo and wood fiber tissue; the solubility and stability of isothiazoles and imidazoles in PEG aqueous solution are poor, and it is difficult to reach an effective concentration; CCB pollutes the environment; Spraying the above antibacterial agent after PEG pretreatment has poor persistence and affects the ancient wood feel

Method used

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  • Antibacterial solidifying agent of excavated bamboo and wood ware
  • Antibacterial solidifying agent of excavated bamboo and wood ware
  • Antibacterial solidifying agent of excavated bamboo and wood ware

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] In this scheme, the antibacterial solid agent contains the following components by weight:

[0061] Chitooligosaccharide 50 parts, catechin 100 parts, polyethylene glycol 1000 parts, water 850 parts, ethanol 150 parts.

[0062] Wherein the molecular weight of polyethylene glycol in the polyethylene glycol solution is 2000, the average molecular weight of chitosan oligosaccharide is 2000, the deacetylation degree is 94.2%, the epigallocatechin gallate EGCG content of catechin is 63.2%, The ECG content of epicatechin gallate is 14.6%, and the EC content of epicatechin is 8.5%.

[0063] Dissolve polyethylene glycol in water and ethanol to form a solution with a mass fraction of 20%; add chitosan and catechin to the above solution, and stir evenly at 40°C to 50°C; adjust the pH value to 5.5; 50 ℃~70℃ in a constant temperature bath, so that the polyethylene glycol solution is concentrated until the mass fraction of polyethylene glycol is 50%.

[0064] The mechanical proper...

Embodiment 2

[0066] In this scheme, the antibacterial solid agent contains the following components by weight:

[0067] Chitooligosaccharide 4 parts, catechin 20 parts, polyethylene glycol 1000 parts, water 850 parts, ethanol 150 parts.

[0068] Wherein the molecular weight of polyethylene glycol in the polyethylene glycol solution is 1500, the average molecular weight of chitosan oligosaccharide is 1800, the deacetylation degree is 91%, the epigallocatechin gallate EGCG content of catechin is 60%, The ECG content of epicatechin gallate is 12%, and the EC content of epicatechin is 6%.

[0069] Dissolve polyethylene glycol in water and ethanol to form a solution with a mass fraction of 20%; add chitosan and catechin to the above solution, and stir evenly at 40°C to 50°C; adjust the pH value to 5.5; 50 ℃~70℃ in a constant temperature bath, so that the polyethylene glycol solution is concentrated until the mass fraction of polyethylene glycol is 30%.

[0070] This program is more suitable f...

Embodiment 3

[0072] In this scheme, the antibacterial solid agent contains the following components by weight:

[0073] Chitooligosaccharide 30 parts, catechin 40 parts, polyethylene glycol 1000 parts, water 850 parts, ethanol 150 parts.

[0074] Wherein the molecular weight of polyethylene glycol in the polyethylene glycol solution is 4000, the average molecular weight of chitosan oligosaccharide is 2200, the deacetylation degree is 96%, the epigallocatechin gallate EGCG content of catechin is 65%, The ECG content of epicatechin gallate is 16%, and the EC content of epicatechin is 10%.

[0075] Dissolve polyethylene glycol in water and ethanol to form a solution with a mass fraction of 20%; add chitosan and catechin to the above solution, and stir evenly at 40°C to 50°C; adjust the pH value to 5.5; 50 ℃~70℃ in a constant temperature bath, so that the polyethylene glycol solution is concentrated until the mass fraction of polyethylene glycol is 65%.

[0076] This scheme is more suitable ...

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Abstract

The invention belongs to the historical relic protection and repair technical field, in particular relates to an antibacterial solidifying agent of excavated bamboo and wood ware. The invention is characterized in that the solidifying agent comprises the following components in parts by weight: 4-100 parts of oligomeric chitosan, 20-200 parts of catechin, 600-1300 parts of polyethylene glycol, 850 parts of water and 150 parts of ethanol. The invention researches the fundamental substances of bamboo and wood and the structure and properties of inclusions, selects oligomeric chitosan of which structure is similar to the basic structural unit of cellulose and the polyphenol substance catechin existing in plants and provides a solidifying agent with natural antibacterial substances for excavated bamboo and wood ware. The solidifying agent maintains the solidifying effect of PEG, has bacteriostasis and antibacterial effect, is environmentally friendly and belongs to the green and environmentally friendly antibacterial solidifying agent.

Description

technical field [0001] The invention belongs to the technical field of protection and restoration of cultural relics, and in particular relates to an antibacterial solid agent for unearthed bamboo and wood ware. Background technique [0002] The unearthed water-saturated bamboo and wooden cultural relics were treated with size stabilizer before freeze-drying to prevent the bamboo wood from cracking and deforming due to the increase in ice volume (about +13%) after the water-saturated bamboo wood was frozen. Buried in the aquifer, most bamboo wood cellulose is severely degraded by chemical and biological corrosion. Cellulose is the basic substance that makes up the skeleton of bamboo wood. Degraded bamboo wood not only greatly reduces its mechanical properties and basic density, making it extremely fragile, but also vulnerable to mold and rot fungi during protection and preservation. Corresponding reinforcement and protection measures must be taken. [0003] The microbial ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/50
Inventor 李东风卢衡
Owner 浙江省博物馆
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