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Novel Dioscorea cirrhosa tannin wood adhesive

An adhesive and woodworking technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve problems such as damage to human health, and achieve the effects of less formaldehyde emission, simple process, and easy availability of raw materials

Inactive Publication Date: 2017-02-15
佛山市中国地质大学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to develop a new type of tannin woodworking adhesive with simple process, good performance and green environmental protection in order to overcome the shortcomings of existing woodworking adhesives that release harmful components and damage human health.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The preparation of embodiment 1 a kind of novel yam tannin woodworking adhesive comprises the following steps:

[0013] (1) Wash and peel the fresh yam, crush and dry it for later use. Take 20g of yam powder, add 800ml of 50% acetone solution, and add 10g of sodium bisulfite, and extract with 200W microwave for 15min.

[0014] (2) After suction filtration, add 10g of polyoxymethylene to the Panicum yam extract, and add 20ml of 2% dilute hydrochloric acid at the same time.

[0015] (3) Under stirring conditions, react at a constant temperature of 80°C for 8 hours, distill off the solvent under reduced pressure, and obtain the product woodworking adhesive after freeze-drying.

Embodiment 2

[0016] Embodiment 2: the preparation of a kind of novel yam tannin woodworking adhesive comprises the following steps:

[0017] (1) Wash and peel the fresh yam, crush and dry it for later use. Take 20g of yam powder, add 800ml of 50% acetone solution, and add 20g of sodium bisulfite, and extract with 200W microwave for 15min.

[0018] (2) After suction filtration, add 10g of polyoxymethylene to the Panicum yam extract, and add 20ml of 2% dilute hydrochloric acid at the same time.

[0019] (3) Under stirring conditions, react at a constant temperature of 90°C for 8 hours, distill off the solvent under reduced pressure, and obtain the product woodworking adhesive after freeze-drying.

Embodiment 3

[0020] Embodiment 3: the preparation of a kind of novel yam tannin woodworking adhesive comprises the following steps:

[0021] (1) Wash and peel the fresh yam, crush and dry it for later use. Take 20g of yam powder, add 800ml of 50% acetone solution, and add 20g of sodium bisulfite, and extract with 200W microwave for 15min.

[0022] (2) After suction filtration, add 20g of polyoxymethylene to the Panicum yam extract, and add 20ml of 2% dilute hydrochloric acid at the same time.

[0023] (3) Under stirring conditions, react at a constant temperature of 100°C for 8 hours, distill off the solvent under reduced pressure, and obtain the product woodworking adhesive after freeze-drying.

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Abstract

The invention mainly relates to a preparation method of a novel Dioscorea cirrhosa tannin wood adhesive. The preparation method of the novel Dioscorea cirrhosa tannin wood adhesive comprises the following steps: washing and peeling fresh Dioscorea cirrhosa, crushing and drying the washed and peeled fresh Dioscorea cirrhosa, and preserving the crushed and dried Dioscorea cirrhosa; and adding an extraction solvent according to a certain solid-to-liquid ratio, adding a small amount of sodium bisulfate, carrying out microwave extraction for 15 min, carrying out suction filtration, adding a certain amount of paraform and a small amount of 2% dilute hydrochloric acid, carrying out a constant-temperature stirring reaction for 8 h, carrying out reduced pressure distillation to remove a solvent, and freeze-drying the solvent removed reaction product to obtain the powdery wood adhesive. Compared with traditional adhesives, the wood adhesive prepared in the invention has the characteristics of small formaldehyde release amount, simple process, and easily available raw materials.

Description

technical field [0001] The invention relates to a tannin woodworking adhesive. Background technique [0002] At present, the woodworking adhesives used more in my country are chemically synthesized adhesives (such as: phenolic resin adhesives and urea-formaldehyde resin adhesives) that are made of petrochemical products. The development and utilization of adhesives have once again attracted people's attention. [0003] Buttercup, also known as blood mother, abounds in my country's Zhejiang, Guangdong, Guangxi, Sichuan and other places. Its parenchyma cells contain tannins. Due to the characteristics of the tannin structure, the reaction rate of tannin to formaldehyde is 10 to 50 times that of phenol. The tannin-formaldehyde resin does not need to be polycondensed from the monomers of phenol and aldehyde in the phenolic resin, and the self-condensation of tannin is greatly improved. Reduced formaldehyde emission. [0004] For this reason, the inventor of the present invent...

Claims

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Application Information

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IPC IPC(8): C09J159/00C09J11/06
CPCC08K5/13C09J11/06C09J159/00
Inventor 陈亮皮振邦
Owner 佛山市中国地质大学研究院
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