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Method of in situ growth of nano titanium dioxide protective layer on wood surface

A nano-titanium dioxide and wood surface technology, applied in wood treatment, wood processing equipment, wood treatment details, etc., can solve the problems of complex process, high cost, waste of raw materials, etc., and achieve simple process, low reaction cost and high utilization rate of raw materials Effect

Inactive Publication Date: 2010-05-26
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of complex process, waste of raw materials and high cost in the existing wood protection method. The present invention provides a method for in-situ growth of nano-titanium dioxide protective layer on the surface of wood

Method used

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  • Method of in situ growth of nano titanium dioxide protective layer on wood surface
  • Method of in situ growth of nano titanium dioxide protective layer on wood surface
  • Method of in situ growth of nano titanium dioxide protective layer on wood surface

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specific Embodiment approach 1

[0012] Specific Embodiment 1: In this embodiment, the method for growing a nano-titanium dioxide protective layer in situ on the wood surface is achieved through the following steps: 1. After cleaning or polishing the wood surface, immerse it in 0.01-5mol / L titanium salt alcohol solution , then seal the reactor, and then cool to room temperature after hydrothermal reaction at 60-200°C for 3-8 hours; 2. Prepare 3.0×10 -4 ~20×10 -4 mol / L sodium dodecylsulfonate (SDS) solution, then adjust the pH value to 8-10, then add it into the reactor, then seal the reactor, and react at 70°C for 4-8h, in which dodecane The volume ratio of sodium sulfonate (SDS) solution to titanium salt alcohol solution is 1:1; 3. After drying the wood treated in step 2 for 10 to 15 hours at 40 to 50°C, the in situ growth nanometer on the surface is obtained. Titanium dioxide protective layer of wood.

[0013] The preparation of the titanium salt alcohol solution in this embodiment is an existing conventi...

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment is different from Embodiment 1 in that the wood in step 1 is poplar, birch, Chinese fir or balsa. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the titanium salt in step 1 is tetrabutyl titanate, sulfuric acid phthalein or titanium tetrachloride. The other steps and parameters are the same as the specific way 1 or 2.

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Abstract

The invention discloses a method of in situ growth of a nano titanium dioxide protective layer on a wood surface, and relates to a preparation method of a wood protective layer. The invention solves the problems of complex process, wasteful raw materials and high cost in current wood protective method. The method of the invention comprises the following steps: 1. immersing wood into titanium salt alcoholic solution, and carrying out hydro-thermal reaction in a sealed reactor; 2. adding SDS solution into the reactor and then reacting; and 3. drying the wood after the above processing. The method of the invention utilizes a low-temperature hydro-thermal cosolvent method, and has simple process, non-volatile components, high usage of raw materials and low cost; the reaction is carried out in the sealed reactor; subsequent processing does not need high temperature annealing process; the obtained wood keeps original natural texture, simultaneously has favorable hydrophobicity, and can be applied in the environments with high humidity and greatly changed temperature and humidity. The method of the invention effectively applies the titanium dioxide nano functional materials to the wood.

Description

technical field [0001] The invention relates to a preparation method of a wood protective layer. Background technique [0002] Wood is a natural renewable polymer organism, deeply loved by people, and is an important raw material for economic construction and people's life. However, due to the rich hydroxyl groups and porous structure in wood, moisture will often move due to changes in air humidity and temperature, causing the wood to expand or shrink and deform, accelerating aging and decay. The traditional wood surface protection method is mainly to paint various organic coatings on the wood surface to protect the wood, which has a certain protective effect, but the wood painted with organic coatings has some problems such as yellowing, loss of light, and irritation to people. . In recent years, with the development of nanoscience, filling and impregnating the interior of wood with inorganic materials for functional improvement has become a research hotspot, such as usin...

Claims

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Application Information

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IPC IPC(8): B27K5/00
Inventor 刘一星孙庆丰于海鹏卢芸
Owner NORTHEAST FORESTRY UNIVERSITY
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