Preparation method of graphene oxide or silicon dioxide composite modifier and application thereof

A composite modifier and silica technology, which is used in manufacturing tools, wood treatment, pressure impregnation, etc., can solve the problems of non-environmentally friendly modifying reagents, single product functions, and complex preparation processes, and reduce the impact of the product. The effect of identification of fungi and insects, convenient operation and simple preparation process

Inactive Publication Date: 2018-07-13
BEIJING FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of complex preparation process, simplification of product functions, and environmental-friendly characteristics of modification reagents in the existing wood modification technology, the purpose of the present invention is to provide a composite modifier, and utilize its Modification of wood to reduce wood water absorption, improve wood dimensional stability and surface hardness

Method used

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  • Preparation method of graphene oxide or silicon dioxide composite modifier and application thereof
  • Preparation method of graphene oxide or silicon dioxide composite modifier and application thereof
  • Preparation method of graphene oxide or silicon dioxide composite modifier and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Preparation of graphene oxide / silica composite modifier

[0030] At room temperature, 10% of graphene oxide dispersion (0.25wt%), 5% of neutral silica sol (30wt%) and 85% of deionized water were added to the reactor in turn according to the volume ratio of the sum of 100%. The prepared mixed solution needs to be stirred at a speed of 200 rpm for 15 min under the stirring of a magnetic stirrer, and then ultrasonically treated for 25 min to make the modified mixed solution disperse uniformly to obtain a graphene oxide / silica composite modifier.

[0031] 2. Preparation of modified wood

[0032] The wood was placed in the immersion tank for vacuum treatment, the relative vacuum degree was -0.08MPa, and the treatment time was 30min. Graphene oxide / silicon dioxide composite modified solvent was injected, and after the treatment tank was filled, pressure treatment was performed. The relative pressure of the pressure treatment was 0.6 MPa, and the treatment time was 100 min...

Embodiment 2

[0034] 1. Preparation of graphene oxide / silica composite modifier

[0035] At room temperature, 10% of graphene oxide dispersion (0.25wt%), 10% of neutral silica sol (30wt%) and 80% of deionized water were added to the reactor according to the ratio of the volume ratio to 100%. The prepared mixed solution needs to be stirred at a speed of 200 rpm for 15 min under the stirring of a magnetic stirrer, and then ultrasonically treated for 25 min to make the modified mixed solution disperse uniformly to obtain a graphene oxide / silica composite modifier.

[0036] 2. Preparation of modified wood

[0037] The wood was placed in the immersion tank for vacuum treatment, the relative vacuum degree was -0.08MPa, and the treatment time was 30min. The graphene oxide / silicon dioxide composite modified solvent was injected, and after the treatment tank was filled, pressure treatment was performed. The relative pressure of the pressure treatment was 0.7 MPa, and the treatment time was 110 min....

Embodiment 3

[0039] 1. Preparation of graphene oxide / silica composite modifier

[0040]At room temperature, 10% of graphene oxide dispersion (0.25wt%), 20% of neutral silica sol (30wt%) and 70% of deionized water were added to the reactor in turn according to the volume ratio of the sum of 100%. The prepared mixed solution needs to be stirred at a speed of 300 rpm for 20 min under the stirring of a magnetic stirrer, and then ultrasonically treated for 30 min to make the modified mixed solution disperse uniformly to obtain a graphene oxide / silica composite modifier.

[0041] 2. Preparation of modified wood

[0042] The wood is placed in the immersion tank for vacuum treatment, the relative vacuum degree is -0.1MPa, and the treatment time is 30min. Graphene oxide / silicon dioxide composite modified solvent was injected, and after the treatment tank was filled, pressure treatment was carried out. The relative pressure of the pressure treatment was 0.8 MPa, and the treatment time was 120 min. ...

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Abstract

The invention discloses a preparation method of graphene oxide or silicon dioxide composite modifier and an application thereof, and relates to application of a modified wood. The invention aims to solve the problems that an existing wood modification is complex in preparation process, a modified solvent causes a pollution, the modified solvent is high in cost, and is single in function are solved. The composite modifier comprises the following components of, by volume, (0.25wt%) 10% of graphene oxide dispersion liquid, (30wt%) 5%-20% of nano-scale neutral silica sol solution, and 70%-85% of deionized water, wherein the sum of the volume percentages of the components is 100%. The composite modifier is used for carrying out impregnation treatment on the wood, so that the water absorption rate of the wood can be reduced, and the dimensional stability and the surface hardness of the wood can be improved; and the preparation process of the preparation method of the graphene oxide or the silicon dioxide composite modifier and the application thereof has the characteristics of no toxicity, no harm, safety, environmental protection, low cost, and simplicity in operation.

Description

technical field [0001] The invention relates to a composite modification reagent and a preparation method thereof, as well as its application on modified wood. Background technique [0002] Wood is a natural green material with huge reserves in nature. As a building material widely used indoors and outdoors, wood has many superior properties, such as low density, high strength-to-weight ratio, beautiful grain, low processing energy consumption and excellent environmental coordination. However, under the new situation that the supply of high-quality wood resources in the world is decreasing and the logging of natural forests in my country is completely banned, the wood resources commonly used in solid wood processing will be severely restricted. Artificial fast-growing forest wood will become the main raw material of my country's wood industry. Although my country has the largest artificial forest in the world, the wood of the artificial forest is soft in material, low in s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/32B27K3/08B27K3/10B27K5/04
CPCB27K3/32B27K3/08B27K3/10B27K5/04
Inventor 蒲俊文王振兴周紫瑾韩小帅张琴琴吕焱
Owner BEIJING FORESTRY UNIVERSITY
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