A kind of bamboo wood natural anti-mildew preservative

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

Active Publication Date: 2018-10-02
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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  • A kind of bamboo wood natural anti-mildew preservative

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Production method of ginkgo exocarp extract: (1) Drying and pulverization: fresh ginkgo fruit is removed from ginkgo fruit to obtain exocarp, dried in a vacuum drying oven at 65° C. to a moisture content of 4.65%, and pulverized until most of the particles exceed 50 mesh. sieve; (2) leaching: take 70% ethanol solution as the leaching solution, carry out leaching according to the ratio of material to liquid (weight of material / weight of solution) 1:5, and the leaching time is 5 hours; during the leaching process, ultrasonic treatment for 4 (3) Purification: the leaching solution is filtered to obtain a filtrate, add 0.1 mol / L acetic acid to the filtrate, adjust the pH value to 3.0, extract 4 times with ethyl acetate, and separate out ethyl acetate. Ester phase; (4) Concentration: the ethyl acetate phase is rotary-steamed at 75°C to obtain Ginkgo biloba exocarp extract.

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

Embodiment 2

[0021] Production method of ginkgo exocarp extract: (1) Drying and pulverization: fresh ginkgo fruit is removed from ginkgo fruit to obtain exocarp, dried in a vacuum drying oven at 65° C. to a moisture content of 4.28%, and pulverized until most of the particles exceed 50 mesh. sieve; (2) leaching: take 50% ethanol solution as the leaching solution, carry out leaching according to the ratio of material to liquid (weight of material / weight of solution) 1:10, and the leaching time is 3 hours; during the leaching process, ultrasonic treatment for 3 (3) Purification: the leaching solution is filtered to obtain a filtrate, add 0.1 mol / L acetic acid to the filtrate, adjust the pH value to 3.5, extract 3 times with ethyl acetate, and separate to obtain ethyl acetate Ester phase; (4) Concentration: the ethyl acetate phase was rotary-steamed at 70° C. to obtain the Ginkgo biloba seed coat extract.

[0022] With reference to the raw material and the parts by weight value of Example 2 i...

Embodiment 3

[0024] Production method of Ginkgo biloba seed coat extract: (1) with embodiment 1; (2) leaching: take 30% ethanol solution as leaching solution, carry out leaching according to the ratio of material to liquid (weight of material / weight of solution) 1:5 , the leaching time is 2 hours; during the leaching process, ultrasonic treatment is performed twice for 15 minutes each time; (3) Purification: the leaching solution is filtered to obtain a filtrate, and 0.1mol / L acetic acid is added to the filtrate to adjust the pH value To 3, extracted twice with ethyl acetate to separate the ethyl acetate phase; (4) Concentration: the ethyl acetate phase was subjected to rotary evaporation at 70°C to obtain the Ginkgo biloba seed coat extract.

[0025] With reference to the raw materials and the parts by weight value of Example 3 in the above table, 5 parts of Ginkgo biloba exocarp extracts were first added to 105 parts of dissolving agents (the ratio of ethanol to water 5:5), and 0.5 parts ...

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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 anti-mildew and anti-corrosion, and relates to a natural anti-mildew anti-corrosion agent using Ginkgo biloba exocarp extract 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 discoloration of bamboo wood and its products, reduce its use value, and is not conducive to subsequent processing and utilization. Mildew preservative technology has always attracted attention. Scholars at home and abroad have carried out a lot of research on the anti-mold and anti-corrosion of bamboo wood. The early anti-fungal anti-corrosion agents developed have relatively high toxicity. Banned in European and American countries; later, some low-toxicity industrial fungicides were synthesized in industry, such as chlorothalonil, thioether benzothiazole der...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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