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Preparation method of wood/nano titanium dioxide composite material

A technology of nano-titanium dioxide and composite materials, which is applied in the field of preparation of wood/nano-titanium dioxide composite materials, can solve the problems of environmental pollution, limited improvement of wood thermal stability and dimensional stability, and achieve improved hygroscopicity and antibacterial properties. The effect of low and high humidity

Inactive Publication Date: 2014-06-11
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the treatment method of filling the cell lumen with organic polymers has limited improvement on the thermal stability and dimensional stability of wood, and will bring problems such as environmental pollution.

Method used

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  • Preparation method of wood/nano titanium dioxide composite material
  • Preparation method of wood/nano titanium dioxide composite material
  • Preparation method of wood/nano titanium dioxide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of wood / nano titanium dioxide composite material is realized through the following steps:

[0024] 1. Prepare titanium sol by hydrolyzing the precursor solution: Slowly add deionized water to the titanium salt alcohol solution to obtain a mixed solution, and add anhydrous acetic acid as a catalyst, wherein the molar ratio of deionized water to titanium salt is 1:1, The molar ratio of anhydrous alcohol solvent to titanium salt is 6:1, the molar ratio of catalyst to titanium salt is 0.1:1, add concentrated hydrochloric acid to adjust the pH value to 1.5, and stir for 30 minutes to obtain a titanium sol solution;

[0025] 2. Vacuum pressure impregnation of wood: Keep fir wood (20×20×5mm) with a moisture content of 0% at a vacuum degree of -0.08Mpa for 20 minutes, and then inject the titanium sol precursor solution under vacuum. Then pressurize under the pressure of 1Mpa for 30min, and return to the normal pressure to obtain impregnated wet wood;

[...

Embodiment 2

[0029] The preparation method of wood / nano titanium dioxide composite material is realized through the following steps:

[0030] 1. Prepare titanium sol by hydrolyzing the precursor solution: Slowly add deionized water to the titanium salt alcohol solution to obtain a mixed solution, and add anhydrous acetic acid as a catalyst, wherein the molar ratio of deionized water to titanium salt is 1:1, The molar ratio of anhydrous alcohol solvent to titanium salt is 8:1, the molar ratio of catalyst to titanium salt is 0.1:1, add concentrated hydrochloric acid to adjust the pH value to 1.5, and stir for 30 minutes to obtain a titanium sol solution;

[0031] 2. Ultrasonic vibration impregnation of wood: immerse fir (20×20×5mm) with a moisture content of 0% into the titanium sol precursor solution, and put it into an ultrasonic oscillator (frequency 80kHz, power 50W) , keep the temperature around room temperature, and obtain impregnated wet wood after ultrasonic vibration for 2 h;

[00...

Embodiment 3

[0034] The preparation method of wood / nano titanium dioxide composite material is realized through the following steps:

[0035] 1. Prepare titanium sol by hydrolyzing the precursor solution: Slowly add deionized water to the titanium salt alcohol solution to obtain a mixed solution, and add anhydrous acetic acid as a catalyst, wherein the molar ratio of deionized water to titanium salt is 1:1, The molar ratio of anhydrous alcohol solvent to titanium salt is 6:1, the molar ratio of catalyst to titanium salt is 0.1:1, add concentrated nitric acid to adjust the pH value to 1.5, and stir for 30 minutes to obtain a titanium sol solution;

[0036] 2. Ultrasonic vibration impregnation of wood: immerse fir (20×20×5mm) with a moisture content of 0% into the titanium sol precursor solution, and put it into an ultrasonic oscillator (frequency 80kHz, power 100W) , keeping the temperature at room temperature, ultrasonically oscillating for 4 hours to obtain impregnated wet wood;

[0037]...

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Abstract

The invention discloses a preparation method of a wood / nano titanium dioxide composite material. The preparation method of the wood / nano titanium dioxide composite material comprises the following steps: (1) preparing a titanium sol solution; (2) placing wood into the titanium sol solution, and carrying out ultrasonic vibration impregnation or vacuum pressurization impregnation; (3) aging and drying the wet wood after impregnation, thereby obtaining the wood / nano titanium dioxide composite material. According to the invention, the wood / nano titanium dioxide composite material is prepared by adopting an ultrasonic vibration impregnation sol-gel method or a vacuum pressurization impregnation sol-gel method; the preparation method is simple in process, saves time, is low in cost, and is extremely high in stability; titanium sol can permeate into the inside of wood, and the thermal stability, the hygroscopicity and antibacterial property of the wood / nano titanium dioxide composite material are improved obviously; meanwhile, the intensity and the hardness are improved greatly; the preparation method of the wood / nano titanium dioxide composite material can be applied to environments with high humidity and temperature change.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a preparation method of a wood / nano-titanium dioxide composite material. Background technique [0002] Wood is an excellent green engineering material and industrial raw material with low cost and renewable. In the field of construction and decoration, wood is used in large quantities. However, the rich hydroxyl groups and porous structure in wood make it flammable and greatly affected by the environment. It often expands or shrinks due to changes in air temperature and humidity, which accelerates aging and decay. However, wood with high strength and good dimensional stability can meet people's needs. The traditional wood modification method is mainly to paint various coatings on the wood surface. Although it has a certain protective effect, there are still problems such as yellowing, loss of light, and peeling; or the wood-organic polymer is prepared by impregnat...

Claims

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Application Information

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IPC IPC(8): B27K3/52
Inventor 詹红兵王百灵卢嫣冯苗
Owner FUZHOU UNIV
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