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Natural mildew-proof and corrosion-proof agent for bamboos and woods

A preservative and wood technology, applied in the direction of impregnating wood, wood impregnation, wood processing appliances, etc., can solve the problems of human harm, mildew-proof and preservative toxicity, etc., and achieve the effect of strong anti-loss and long-term mildew-proof effect.

Active Publication Date: 2017-04-05
ZHEJIANG FORESTRY ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing anti-mildew preservatives are toxic to a certain extent and cause harm to the human body. Therefore, natural, environmentally friendly and efficient anti-mold preservatives are prepared by using natural plant and marine biological extracts to replace the chemically synthesized anti-mold preservatives currently used in the market. It is of great significance to improve the safety and environmental protection performance of bamboo and wood products, protect the living environment and improve human health.

Method used

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  • Natural mildew-proof and corrosion-proof agent for bamboos and woods

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The production method of Ginkgo biloba extract: (1) Drying and crushing: Fresh ginkgo fruits are removed from the ginkgo biloba to obtain the testa, dried in a vacuum drying oven at 65°C to a moisture content of 4.65%, and crushed until most of the particles pass 50 mesh Sieve; (2) Extraction: use 70% ethanol solution as the extraction liquid, and carry out extraction according to the material-to-liquid ratio (material weight / solution weight) 1:5, and the extraction time is 5 hours; during the extraction process, ultrasonic treatment 4 30 minutes each time; (3) Purification: filter the extract to obtain the filtrate, add 0.1 mol / L acetic acid to the filtrate, adjust the pH to 3.0, extract 4 times with ethyl acetate, and separate ethyl acetate Ester phase; (4) Concentration: The ethyl acetate phase was subjected to rotary steaming at 75°C to obtain the Ginkgo biloba exocarp extract.

[0019] With reference to the raw materials and parts by weight of Example 1 in the above t...

Embodiment 2

[0021] Production method of Ginkgo biloba extract: (1) Drying and crushing: Fresh ginkgo fruits are removed from the ginkgo fruit to obtain the extrus, dried in a vacuum drying oven at 65°C to a moisture content of 4.28%, and crushed until most of the particles pass 50 mesh Sieve; (2) Extraction: use 50% ethanol solution as the extraction liquid, and carry out extraction according to the material-to-liquid ratio (material weight / solution weight) 1:10, and the extraction time is 3 hours; during the extraction process, ultrasonic treatment 3 20 minutes each time; (3) Purification: filter the extract to obtain the filtrate, add 0.1 mol / L acetic acid to the filtrate, adjust the pH to 3.5, and extract 3 times with ethyl acetate to separate ethyl acetate Ester phase; (4) Concentration: The ethyl acetate phase was subjected to rotary steaming at 70°C to obtain the Ginkgo biloba exocarp extract.

[0022] With reference to the raw materials and parts by weight of Example 2 in the above ta...

Embodiment 3

[0024] The production method of Ginkgo biloba exocarp extract: (1) Same as Example 1; (2) Extraction: 30% ethanol solution is used as the extraction liquid, and the material-to-liquid ratio (material weight / solution weight) is 1:5 for extraction , The extraction time is 2 hours; during the extraction process, ultrasonic treatment is performed twice, each time is 15 minutes; (3) purification: the extraction liquid is filtered to obtain the filtrate, and 0.1 mol / L acetic acid is added to the filtrate to adjust the pH value To 3, extract twice with ethyl acetate, and separate the ethyl acetate phase; (4) Concentration: the ethyl acetate phase is rotary evaporated at 70°C to obtain the Ginkgo biloba exocarp extract.

[0025] With reference to the raw materials and parts by weight of Example 3 in the above table, first add 5 parts of Ginkgo biloba exocarp extract to 105 parts of dissolving agent (ethanol to water ratio 5:5), and slowly add 0.5 part of chitosan after it is completely di...

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Abstract

The invention provides a natural mildew-proof and corrosion-proof agent for bamboos and woods. The natural mildew-proof and corrosion-proof agent for the bamboos and the woods is composed of 0.5-10 parts of gingko testa extracts, 95-105 parts of dissolutions and 0.5-5 parts of chitosan. A production method of the gingko testa extracts includes the steps of drying and smashing operation, ultrasonic extraction of ethanol solutions, acidified extraction and purification and rotary evaporation and concentration. The natural mildew-proof and corrosion-proof agent has the beneficial effects of being friendly to environment, safe, harmless, high in leaching resistance and good in long-term mildew-proof effect because the gingko testa extracts are adopted as main functional agents and the chitosan is adopted as an auxiliary agent. In addition, the natural mildew-proof and corrosion-proof agent can be used for changing colors of the bamboos and the woods.

Description

Technical field [0001] The invention belongs to the technical field of wood mildew and anticorrosion, and relates to a natural antifungal and antiseptic agent using Ginkgo biloba extracts as a functional agent. Background technique [0002] The tissue structure of bamboo wood is rich in various nutrients required for the growth of microorganisms. The growth of microorganisms can easily lead to mildew and color change of bamboo wood and its products, reduce its use value, and is not conducive to subsequent processing and utilization. Therefore, the prevention of bamboo wood Mildew antiseptic technology has always attracted attention. Scholars at home and abroad have conducted a lot of research on the anti-mildew and anti-corrosion of bamboo and wood. The early anti-mildew and anti-corrosive agents developed have greater toxicity. For example, the boranophenol mixture that has been widely used has been widely used because of its high toxicity. Banned in European and American count...

Claims

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Application Information

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IPC IPC(8): B27K3/50A01N65/00A01P1/00A01P3/00
Inventor 庄晓伟陈顺伟潘炘蒋应梯张文福
Owner ZHEJIANG FORESTRY ACAD
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