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A method for multifunctional treatment of artificial fast-growing forest wood

A fast-growing forest, multi-functional technology, used in wood treatment, wood heat treatment, wood treatment details, etc., can solve problems such as easy combustion and reduced mechanical properties, improve physical and mechanical properties, improve physical and mechanical properties, and promote sustainable development. Effect

Active Publication Date: 2017-11-10
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties of wood after esterification are reduced, and it is more flammable than untreated wood.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (a) Mix maleic anhydride and pyridine to prepare an esterification liquid, the proportion (mass percentage) of maleic anhydride is 97%, and pyridine is 3%.

[0028] Combine silica sol with borax and zinc borate to prepare silicon-boron composite modification solution. First, heat silica sol with a concentration of 30% by mass and a pH value of 10 to 11 to 50°C, add borax and zinc borate powder, and stir for 30 minutes. Cool down to below 30°C, then add 20% sodium hydroxide solution by mass percentage, adjust the pH value to 12-13, and obtain a colorless and transparent silicon-boron composite modification solution that can be stored stably. Among them, the addition of borax accounts for 3% of the total mass of silica sol, the addition of zinc borate accounts for 2% of the total mass of silica sol, and the addition of sodium hydroxide solution accounts for 6% of the total mass of silica sol.

[0029] (b) Place the plantation poplar boards with specifications of 1000mm×15...

Embodiment 2

[0037] (a) Mix maleic anhydride and pyridine to prepare an esterification liquid, the proportion (mass percentage) of maleic anhydride is 98%, and pyridine is 2%.

[0038] Combine silica sol with borax and zinc borate to prepare silicon-boron composite modification solution. First, heat the silica sol with a mass percentage concentration of 30% and a pH value of 10 to 11 to 60°C, add borax and zinc borate powder, and stir for 30 minutes. Cool down to below 30°C, then add sodium hydroxide solution with a mass percentage concentration of 20%, adjust the pH value to 12-13, and obtain a colorless and transparent composite modified liquid that can be stored stably. Among them, the addition of borax accounts for 4% of the total mass of silica sol, the addition of zinc borate accounts for 1% of the total mass of silica sol, and the addition of sodium hydroxide solution accounts for 8% of the total mass of silica sol.

[0039] (b) Place the artificial forest cedar plate with a specifi...

Embodiment 3

[0047] Process plantation Chinese fir according to the method for embodiment 1, difference is:

[0048] In step (a), maleic anhydride accounts for 98%, and pyridine accounts for 2%.

[0049] The amount of borax added in the silicon-boron composite modification solution accounted for 2.5% of the total mass of silica sol, the amount of zinc borate added accounted for 1.8% of the total mass of silica sol, and the amount of sodium hydroxide solution accounted for 5.5% of the total mass of silica sol.

[0050] In step (b), the size of the wood is 1000mm×100mm×30mm (longitudinal×chord×radial), the moisture content is 15%, and the holding time is 60min after vacuuming.

[0051] In step (c), the pressure in the tank is applied to 1.5 MPa, and the wood is soaked for 4 hours.

[0052] In step (d), the vacuum heat treatment temperature is 120° C. and the time is 6 hours.

[0053] In step (e), the internal pressure of the tank is maintained at 1.8 MPa, and the wood is impregnated for 8 ...

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PUM

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Abstract

The invention belongs to a multifunctional treating method for planted fast-growing forest wood. Firstly, maleic anhydride serves as an esterifying agent, pyridine serves as a catalyst, after the maleic anhydride and the pyridine are mixed, vacuum pressurizing immersion treatment is carried out on the planted forest wood under the normal-temperature condition, after the wood is completely saturated through the maleic anhydride, by means of heating and the catalyzing effect of the pyridine, an esterification reaction between wood cell wall hydroxyl and the maleic anhydride is completed, and esterified wood is obtained; and secondly, silicon boron compound modified liquid is prepared and used for carrying out vacuum pressurizing immersion treatment on the esterified wood, and ludox condensation is promoted through the acid environment in the wood. The multifunctional treating method has the beneficial effects that modifying treatment can be carried out on the esterified wood on the premise of keeping the good size stability and corrosion resistance of the esterified wood, the physical mechanical performance, the fire resistance and the corrosion resistance of the planted fast-growing forest wood can be completely improved, multi-functionalization and high-value-added utilization of the planted forest wood are achieved, the wood imbalance between supply and demand in China can be relieved, and the sustainable development of forest resources in China can be promoted.

Description

technical field [0001] The invention belongs to a method for multifunctional treatment of artificial fast-growing forest wood. Background technique [0002] In recent years, the contradiction between the effective supply of timber resources in my country and the ever-increasing social demand has become increasingly prominent. my country's planted forest area is 69 million hectares, ranking first in the world. There are abundant plantation timber resources in China, and it is an effective measure to solve the problem of my country's timber supply and realize the sustainable development of timber utilization by replacing the natural forest timber which is seriously insufficient in my country and importing high-quality timber resources with plantation timber. However, because most of the artificial forest wood (such as poplar, fir, cedar, sylvestris pine, etc.) has defects such as loose material, low density and strength, unstable size, and easy to mildew and decay, it cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/08B27K3/50B27K3/52B27K5/00B27K5/04
CPCB27K3/08B27K3/50B27K3/52B27K5/0085B27K5/04B27K2240/00B27K2240/20B27K2240/30
Inventor 柴宇博刘君良吕文华王小青孙柏玲
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY