Wood-based composite material releasing negative oxygen ions and preparation method thereof

A technology of negative oxygen ions and composite materials, used in wood treatment, wood impregnation, wood impregnation, etc., can solve problems such as the reduction of negative oxygen ions, and achieve the effects of easy control of conditions, promotion of metabolism, and enhancement of body disease resistance.

Inactive Publication Date: 2018-09-28
BEIJING FORESTRY UNIVERSITY
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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 problem in the prior art that the photogenerated electrons and holes produced by

Method used

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  • Wood-based composite material releasing negative oxygen ions and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0018] Example 1:

[0019] The wood-based composite material that releases negative oxygen ions under visible light irradiation described in this embodiment is irradiated with visible light with a wavelength of 380nm to 780nm for 60 to 300 minutes, and the number of negative oxygen ions released is greater than 2500 / cm 2 ;

[0020] The wood-based composite material that releases negative oxygen ions under visible light irradiation is to press untreated wood into a functional wood modifier of graphene oxide, nano-silica, and nano-titanium dioxide, and finally Get clean and dry.

[0021] The beneficial effects of this embodiment are: 1. The band gap of nano-titanium dioxide is relatively wide, and it is easy to generate photo-generated electrons and holes recombination under visible light irradiation, so that the generated negative oxygen ions are reduced, in order to inhibit photo-generated electrons and holes recombination and improve The mobility of charge, the use of graphene oxid...

Example Embodiment

[0025] Example 2:

[0026] The difference between this embodiment and the first embodiment is that the functional wood modifier is prepared according to the following steps: first design two pre-experiments, a. take GO (0.25wt%) + SiO 2 (30wt%) mix, stir evenly with an electromagnetic stirrer, pressurize and impregnate the substrate, test the physical properties of the composite material, such as bending and compression resistance, hardness, water absorption, thermal stability, adsorption capacity, etc., according to the comprehensive performance The performance determines the better quantity ratio; b. Take GO(0.25wt%)+TiO 2 (0.8wt%) mix, stir evenly with an electromagnetic stirrer, pressurize and impregnate the substrate, test the negative oxygen ion release, harmful gas absorption, antibacterial properties and other properties of the composite material obtained, determine the better quantity ratio, and select it SiO 2 (30wt%)+TiO 2 (0.8wt%)+GO (0.25wt%) mixed and mixed uniformly...

Example Embodiment

[0028] Example 3:

[0029] The difference between this embodiment and one of the specific embodiments 1 or 2 is that the wood loaded with functional wood modifier is prepared according to the following steps: the substrate is fixed on the pulse dipping machine, and the modifier is pneumatic The diaphragm pump provides pulse pressure to be injected from one side of the substrate. The growth direction of the wood is selected as the pulse tilt direction. The trunk and the low-molecular modifier will flow out from the other side of the wood. After 30 minutes, the sap of the xylem will be gradually replaced by the latest functional wood modifier. After immersion, the obtained wood is treated for 48h in the air drying process, and then transferred to a drying box for drying. The drying temperature is 90°C, the drying time is about 200h, and the wood pressure is 0.2MPa.

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Abstract

The invention relates to a wood-based composite material releasing negative oxygen ions under visible light irradiation and a preparation method thereof. According to the wood-based composite materialreleasing negative oxygen ions under visible light irradiation and the preparation method thereof, the number of generated negative oxygen ions is reduced due to the combination of photo-generated electrons and holes generated under visible light irradiation. The wood-based composite material releasing negative oxygen ions under visible light irradiation is irradiated by visible light with the wavelength of 380nm-780nm for 60-300min, and the number of released negative oxygen ions is more than 2500/cm<2>. The preparation method comprises the steps of 1, preparation of a functional wood modifying agent; and 2, preparation of wood loaded with the functional modifying agent.

Description

technical field [0001] The invention relates to a wood-based composite material releasing negative oxygen ions under visible light irradiation and a preparation method thereof. Background technique [0002] Negative oxygen ion is a negatively charged oxygen ion, which has the functions of dust removal, deodorization and antibacterial. At the same time, it also has the functions of improving the environment and treating diseases, improving cardiopulmonary function, promoting metabolism, and enhancing the body's disease resistance. It is known as "air vitamin". Wood-based materials, as a commonly used interior decoration material, are closely related to our lives. In response to the call of the "Eighteenth Five-Year Plan", the research and development of green and environmentally friendly wood-based materials has become a hot spot again. [0003] Nano-titanium dioxide can be activated under the action of visible light and generate free radicals with high catalytic activity...

Claims

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Application Information

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IPC IPC(8): B27K5/00B27K3/08B27K3/32B27K5/04
CPCB27K3/08B27K3/32B27K5/003B27K5/04
Inventor 蒲俊文周紫荆韩小帅杨展贺宇祺
Owner BEIJING FORESTRY UNIVERSITY
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