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Method for improving dimensional stability of fast-growing wood by using lignin-based modified liquid medicine

A dimensional stability, lignin-based technology, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of poor dimensional stability of fast-growing wood, and achieve the effect of low price, improved dimensional stability, and abundant resources

Active Publication Date: 2021-08-27
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem of poor dimensional stability of existing fast-growing wood, and provides a method for improving the dimensional stability of fast-growing wood by using a lignin-based modification liquid

Method used

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  • Method for improving dimensional stability of fast-growing wood by using lignin-based modified liquid medicine
  • Method for improving dimensional stability of fast-growing wood by using lignin-based modified liquid medicine
  • Method for improving dimensional stability of fast-growing wood by using lignin-based modified liquid medicine

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specific Embodiment approach 1

[0031] DETAILED DESCRIPTION OF THE INVENTION The present embodiment is a method of increasing the size stability of the speed-raised wood using a lignin-based modified liquid solution, which is carried out in accordance with the following steps:

[0032] First, the pretreatment of industrial lignin:

[0033] The industrial lignin is dispersed in distilled water, and then the pH is 13 to 14 to dissolve, filtrate, to obtain a filtrate, and the filtrate is adjusted to 2 to 3 under a water bath at a temperature of 50 ° C to 80 ° C, and then The filtrate of the pH is 2 to 3 is deposited from 12h to 24 hours to obtain a settled lignin, and the pH of the sink to the washing liquid is 4 to 6, and finally dried to obtain refined lignin;

[0034] Second, the preparation of the activated wood quality:

[0035] 1, dissolve the refined lignin in dimethyl sulfoxide, then heated to a temperature of 80 ° C to 100 ° C, under conditions having a temperature of 80 ° C to 100 ° C, add an anhydride an...

specific Embodiment approach 2

[0046] DETAILED DESCRIPTION OF THE INVENTION Different from the specific embodiments, the present embodiment is: the industrial lignin described in step one is an industrial alkali or lignozoulfonate. Other as the specific embodiment.

specific Embodiment approach 3

[0047] BEST MODE FOR CARRYING OUT THE INVENTION 3: The present embodiment is different from one or two of the specific embodiments that the industrial lignin is dispersed in distilled water in step one, and then the concentration of 1 mo / l to 3 mol / L is used to sodium hydroxide solution or The potassium hydroxide solution having a concentration of 1 mo / l to 3 mol / L is adjusted to dissolve the pH of 13 to 14, and the mass percentage is 10% to 15% under a water bath condition of 50 ° C to 80 ° C. Halding hydrochloric acid, a mass percentage of 10% to 15% is a phosphoric acid having a mass percentage of 10% to 15% to adjust the filtrate pH to 2 to 3. Others are the same as those of the specific embodiments.

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Abstract

The invention relates to a method for improving the dimensional stability of fast-growing wood, in particular to a method for improving the size stability of fast-growing wood through lignin-based modified liquid medicine, and aims to solve the problem that existing fast-growing wood is low in the dimensional stability. The method comprises the following steps: 1, pretreating industrial lignin; 2, preparing activated lignin; 3, preparing a lignin-based modified liquid medicine; and 4, treating wood through the lignin-based modified liquid medicine. The method is used for improving the dimensional stability of the fast-growing wood through the lignin-based modified liquid medicine.

Description

Technical field [0001] The present invention relates to a method of increasing the size stability of speed-raised wood. Background technique [0002] my country belongs to Shaolin countries, with only 21.63% of forest coverage, far below 31% of the world. In my country, the amount of wood in China is more than half of the import of foreign imports, and the contradiction between supply and demand of high quality wood is also highlighted. The emergence of artificial vesicles has greatly improved the relatively insufficient quality of resources. The total quality of my country's artificial vents in China ranked first in the world, providing sufficient raw materials for wood processing. However, the fast-growing material is also due to the rapid growth of its presence or absence of natural defects such as loose material, low strength, dimensional stability, and is limited in actual production. Therefore, the performance of wood performance is improved by reasonable technical means, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K5/04B27K3/02B27K3/38C08H7/00
CPCB27K3/08B27K5/04B27K3/025B27K3/38C08H6/00B27K2240/90B27K2240/20
Inventor 王永贵谢延军于凡钧陈雨彤肖泽芳王海刚梁大鑫
Owner NORTHEAST FORESTRY UNIVERSITY
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