Method for union modification of wood by treating cell walls through silicon-containing compound and filling cell cavities with polymer

A silicon compound and cell wall technology, applied in wood impregnation, impregnated wood, wood processing utensils, etc., can solve the problems that are difficult to improve the mechanical properties and durability of wood at the same time, and achieve excellent mechanical properties and dimensional stability, high thermal stability, Effect of improving mechanical properties and durability

Active Publication Date: 2011-04-06
NORTHEAST FORESTRY UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing wood modification methods are difficult to simultaneously improve the mechanical properties and durability of wood, and to provide a method for joint modification of wood by using silicon-containing compounds to treat cell walls and polymers to fill cell cavities

Method used

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  • Method for union modification of wood by treating cell walls through silicon-containing compound and filling cell cavities with polymer
  • Method for union modification of wood by treating cell walls through silicon-containing compound and filling cell cavities with polymer
  • Method for union modification of wood by treating cell walls through silicon-containing compound and filling cell cavities with polymer

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specific Embodiment approach 1

[0012] Embodiment 1: In this embodiment, the method of using silicon-containing compounds to treat cell walls and polymers to fill cell lumens to jointly modify wood is as follows: 1. Pre-humidity of wood: placing wood at a humidity of 20% to 98% Leave it for 1 to 3 months in the environment to obtain wood with a moisture content of ≤30% in the wood cell wall; 2. The configuration of the silicon-containing precursor solution: mix ethyl orthosilicate, absolute ethanol and silane coupling agent in moles The ratio is 1:4:0.1, and then add acid to adjust the pH value to 4.5-5.5 to obtain the silicon-containing precursor solution; 3. The impregnation of the wood with the silicon-containing precursor solution: after the first step The wood was immersed in the silicon-containing precursor solution, vacuumed for 30 minutes under the condition of vacuum degree of -0.08MPa, and then pressurized for 30 minutes under the pressure of 0.8MPa, and the normal pressure was restored. The wood wa...

specific Embodiment approach 2

[0015] Embodiment 2: This embodiment differs from Embodiment 1 in that the acid described in step 2 is hydrochloric acid or acetic acid. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0016] Embodiment 3: This embodiment is different from Embodiment 1 in that the pH value is adjusted to 5.0 in step 2. Others are the same as in the first embodiment.

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Abstract

The invention discloses a method for union modification of wood by treating cell walls through a silicon-containing compound and filling cell cavities with polymer, and relates to a method for modifying the wood. The invention solves the problem that the conventional wood modifying method is difficult to improve the mechanical property and the durability of the wood simultaneously. The method comprises the following steps of: 1, pre-conditioning the wood; 2, preparing silicon-containing precursor solution; 3, impregnating the wood by using the silicon-containing precursor solution; 4, performing chemical treatment on the cell walls of the wood by using the silicon-containing compound through a heating method; 5, preparing organic polymerizable monomer solution; 6, impregnating the wood byusing the organic polymerizable monomer solution; and 7, performing polymerization filling on the cell cavities of the wood by using monomers through a heating method. In the method for treating the wood, the silicon-containing compound is utilized to endow the wood with high thermal stability, lyophobic property and wear resistance, and the organic polymer can be utilized to endow the wood with excellent mechanical property and dimensional stability.

Description

technical field [0001] The invention relates to a method for modifying wood. Background technique [0002] As a natural and renewable biomass polymer composite material, wood has the characteristics of unique honeycomb porous structure, beautiful natural texture, good environmental characteristics, wide range of sources, and suitable processability. Human survival is closely related. [0003] In recent years, with the society's increasing pursuit of returning to nature and the quality of natural ecological life, people's living demand for natural high-quality wood is also increasing. However, the natural high-quality large-diameter timber in the world has been drastically reduced due to excessive use by people, and it has been replaced by a large number of small-diameter timber of fast-growing species. However, these fast-growing species of wood often have low mechanical properties, poor durability, and are almost useless, causing a lot of waste, and also bringing many neg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/02B27K3/50
Inventor 李永峰董晓英刘一星王向明
Owner NORTHEAST FORESTRY UNIVERSITY
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