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Method of dyeing pine wood with tea polyphenol

A technology of tea polyphenols and pine wood, applied in the field of wood dyeing, can solve the problems of low utilization rate, poor color fastness, polluted environment by sewage, etc., and achieve the effects of reducing the harm of human safety, reducing toxicity and protecting the ecological environment.

Inactive Publication Date: 2019-01-29
GUANGXI UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most factories still use traditional reactive dyes and acid dyes for wood dyeing, which not only has low utilization rate and poor color fastness, but also discharges a large amount of sewage to pollute the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for staining pine wood with tea polyphenols, the operation steps are as follows:

[0025] (1) Put the pine board (5g each) with a size of 50mm×35mm×5mm into a sodium hydroxide solution with a mass concentration of 1% (3g sodium hydroxide is dissolved in 300g distilled water), and then put it in a water bath In the pot, heat in a water bath at 55°C for 30 minutes, take it out and clean it and dry at 50°C for 30 minutes;

[0026] (2) Weigh 1.25 g of tea polyphenols and 250 g of distilled water into a beaker and stir evenly to obtain a 0.5% tea polyphenol solution with a mass fraction of 0.5%. Adjust the pH value to 9-11 with sodium hydroxide. The step (1) After drying, the pine wood obtained is put into a beaker containing a tea polyphenol solution with adjusted pH value, and the beaker is dyed for 5 hours at a temperature of 90°C in a water bath with a bath ratio of 1:25, and then 1g of ferrous sulfate is put into it Stir evenly in the beaker, keep the temperature c...

Embodiment 2

[0029] A method for staining pine wood with tea polyphenols, the operation steps are as follows:

[0030] (1) Put the pine board (5g each) with a size of 50mm×35mm×5mm into a sodium hydroxide solution with a mass concentration of 1% (3g sodium hydroxide is dissolved in 300g distilled water), and then put it in a water bath In the pot, heat in a water bath at 55°C for 30 minutes, take it out and clean it and dry at 50°C for 30 minutes;

[0031] (2) Weigh 1.25 g of tea polyphenols and 250 g of distilled water into a beaker and stir evenly to obtain a 2% mass fraction of tea polyphenols solution, adjust the pH value to 9-11 with sodium hydroxide, and change the step (1) After drying, the pine wood obtained is put into a beaker containing a tea polyphenol solution with adjusted pH value, and the beaker is dyed for 5 hours at a temperature of 90°C in a water bath with a bath ratio of 1:25, and then 1g of ferrous sulfate is put into it Stir evenly in the beaker, keep the temperature con...

Embodiment 3

[0034] A method for staining pine wood with tea polyphenols, the operation steps are as follows:

[0035] (1) Put the pine board (5g each) with a size of 50mm×35mm×5mm into a sodium hydroxide solution with a mass concentration of 1% (3g sodium hydroxide is dissolved in 300g distilled water), and then put it in a water bath In the pot, heat in a water bath at 55°C for 30 minutes, take it out and clean it and dry at 50°C for 30 minutes;

[0036] (2) Weigh 1.25g of tea polyphenols and 250g of distilled water into a beaker and stir evenly to obtain a tea polyphenol solution with a mass fraction of 1.5%, adjust the pH to 9-11 with sodium hydroxide, and change the step (1) After drying, the pine wood obtained is put into a beaker containing a tea polyphenol solution with adjusted pH value, and the beaker is dyed for 5 hours at a temperature of 90°C in a water bath with a bath ratio of 1:25, and then 1g of ferrous sulfate is put into it Stir evenly in the beaker, keep the temperature con...

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Abstract

The invention discloses a method of dyeing pine wood with tea polyphenol, which includes: 1) placing the pine wood in a NaOH solution, heating the solution and moving out, cleaning and drying the pinewood; 2) dyeing the dried pine wood in a tea polyphenol solution, pH being maintained at 9-11, and adding a mordant for mordanting; 3) after the mordanting is completed, moving out the pine wood, performing color fixation in a mixed solution containing a color fixation agent and a penetrant, and moving out and air-drying the pine wood. In the method, a pine wood block is dyed with the natural plant dye; when the pine wood is dyed with the plant dye, due to the mediation effect of the mordant, a chemical affinity reaction is carried out between the tea polyphenol and wood fibers, thus generating a new color. The dyed pine wood has certain color fastness and water-washing resistance.

Description

Technical field [0001] The invention relates to the technical field of wood dyeing, in particular to a method for dyeing pine wood with tea polyphenols. Background technique [0002] Pine is widely used in the production of furniture and wood products as a plantation wood with a large accumulation. Its natural color is mostly light yellow, with high brightness, giving a fresh and elegant feeling. However, it will inevitably be too monotonous and simple to use in a large area. Therefore, in order to enhance the visual characteristics of the surface of pine and increase its added value, it can be dyed. At present, most factories still use traditional reactive dyes and acid dyes for wood dyeing, which not only have low utilization rate and poor color fastness, but also discharge a large amount of sewage to pollute the environment. Tea polyphenols are a class of polyphenols contained in tea, which are safe and pollution-free, with good biodegradability and environmental compatibili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/02B27K3/02B27K3/20B27K5/04B27K5/00B27K3/38B27K3/52
CPCB27K3/02B27K3/20B27K3/38B27K3/52B27K5/001B27K5/02B27K5/04
Inventor 孙静余春和
Owner GUANGXI UNIV
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