Novel method for improving hydrophobicity of wood

A hydrophobic, wood technology, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of complex process, high equipment requirements, difficult deep processing, etc., to achieve non-toxic production process, low equipment requirements, thermal stability and The effect of improved dimensional stability

Inactive Publication Date: 2018-03-06
BEIJING FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problems of high equipment requirements, complicated process and difficult deep processing in the existing method for improving wood hydrophobicity, and provides a method for preparing wood with internal and external hydrophobicity by vacuuming and ultrasonic impregnation

Method used

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  • Novel method for improving hydrophobicity of wood
  • Novel method for improving hydrophobicity of wood
  • Novel method for improving hydrophobicity of wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Mix 3mL of ammonia water and 50mL of ethanol, stir magnetically at 50°C for 30min, add 3mL of tetraethoxysilane dropwise into the above solution, and stir at room temperature for 2h after the dropwise addition to obtain a transparent silica sol;

[0022] 2. Mix vinyltriethoxysilane with the above-prepared silica sol in a weight ratio of 1:1, and magnetically stir for 2 hours at a temperature of 50°C to prepare a composite wood modifier, which is set aside;

[0023] 3. Put the wood in the reaction tank, seal the reaction tank and then evacuate to -0.06MPa, and keep the negative pressure for 20min;

[0024] Four, inject the composite wood modifier obtained in the step (two) into the reaction tank under vacuum, make the wood fully impregnated in the composite modifier, apply ultrasonic treatment to the reaction tank while maintaining the vacuum state, ultrasonic power For 1kW, the wood is subjected to vacuum-ultrasonic impregnation treatment for 2h;

[0025] 5. Release...

Embodiment 2

[0027] 1. Mix 3mL of ammonia water and 50mL of ethanol, stir magnetically at 50°C for 30min, add 3mL of tetraethoxysilane dropwise into the above solution, and stir at room temperature for 2h after the dropwise addition to obtain a transparent silica sol;

[0028] 2. Mix vinyltriethoxysilane with the above-prepared silica sol in a weight ratio of 1:1, and magnetically stir for 2 hours at a temperature of 50°C to prepare a composite wood modifier, which is set aside;

[0029] 3. Put the wood in the reaction tank, seal the reaction tank and then evacuate it to -0.08MPa, and keep the negative pressure for 20 minutes;

[0030] Four, inject the composite wood modifier obtained in the step (two) into the reaction tank under vacuum, make the wood fully impregnated in the composite modifier, apply ultrasonic treatment to the reaction tank while maintaining the vacuum state, ultrasonic power For 1kW, the wood is subjected to vacuum-ultrasonic impregnation treatment for 2h;

[0031] 5....

Embodiment 3

[0033] 1. Mix 3mL of ammonia water and 50mL of ethanol, stir magnetically at 50°C for 30min, add 3mL of tetraethoxysilane dropwise into the above solution, and stir at room temperature for 2h after the dropwise addition to obtain a transparent silica sol;

[0034] 2. Mix vinyltriethoxysilane with the above-prepared silica sol in a weight ratio of 1:1, and magnetically stir for 2 hours at a temperature of 50°C to prepare a composite wood modifier, which is set aside;

[0035] 3. Put the wood in the reaction tank, seal the reaction tank and then evacuate to -0.09MPa, and keep the negative pressure for 20 minutes;

[0036] Four, inject the composite wood modifier obtained in the step (two) into the reaction tank under vacuum, make the wood fully impregnated in the composite modifier, apply ultrasonic treatment to the reaction tank while maintaining the vacuum state, ultrasonic power 1.5kW, the wood is subjected to vacuum-ultrasonic impregnation treatment for 2 hours;

[0037] 5....

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Abstract

The invention relates to a novel method for improving hydrophobicity of wood. The novel method comprises the following steps: 1. mixing ammonia water, ethanol and tetraethoxysilane, heating and magnetically stirring to obtain a transparent silica sol; 2. mixing triethoxyvinylsilane with the silica sol and magnetically stirring to obtain a composite wood modifier; 3. placing a wood substrate in a reaction tank, sealing and vacuumizing, and keeping negative pressure for 20min to 30min; 4. under the vacuum condition, injecting the composite wood modifier into the reaction tank, and vacuum-impregnating the wood while applying ultrasonic treatment for 2h to 2.5h; 5. releasing the vacuum degree and ultrasonic treatment, taking the wood and draining the composite wood modifier, drying in the air,and performing gradient heating and drying in an oven to obtain the novel hydrophobic wood. The wood prepared by the method of the invention achieves better hydrophobicity on the surface and inside.Meanwhile, the method provide by the invention has the advantages of low equipment requirements, simple process and strong controllability, non-toxic and environment friendly production process, and large-scale production.

Description

technical field [0001] The invention relates to the field of wood function modification, in particular to a novel method for improving wood hydrophobicity. Background technique [0002] As an environmentally friendly material, wood is widely used in furniture, construction, interior decoration and other fields. Because wood has a large number of hydrophilic groups and rich pore structures, it is easy to absorb water from the outside when it is placed in a humid environment for a long time, and it will deform, mildew, decay, and degrade. Hydrophobic treatment is carried out on the wood, so that the wood is not prone to water accumulation, sticky snow fluid, etc., so that it can have various technical problems such as dimensional stability, snow resistance, low temperature resistance, mildew resistance, self-cleaning, etc. Its scope of use can significantly increase the added value of the product. Therefore, the study of hydrophobic properties of wood is of great significanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K3/52B27K5/00B27K5/04
CPCB27K3/08B27K3/52B27K5/0065B27K5/04B27K2240/70
Inventor 蒲俊文韩小帅王振兴张琴琴邢立艳王澌杰
Owner BEIJING FORESTRY UNIVERSITY
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