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Method for preparing wood surface hydrophilicity-hydrophobicity reversible switch

A kind of wood surface, affinity and sparse technology, applied in wood treatment, wood processing equipment, wood treatment details, etc., can solve the problems of not having self-cleaning function, not being able to have hydrophilicity and hydrophobicity at the same time, and achieve good stability

Inactive Publication Date: 2014-03-12
NORTHEAST 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 that existing wood surface modification methods cannot have both hydrophilicity and hydrophobicity, and does not have the self-cleaning function, and provides a method for preparing a wood surface reversible switch.

Method used

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  • Method for preparing wood surface hydrophilicity-hydrophobicity reversible switch
  • Method for preparing wood surface hydrophilicity-hydrophobicity reversible switch
  • Method for preparing wood surface hydrophilicity-hydrophobicity reversible switch

Examples

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specific Embodiment approach 1

[0018] Embodiment 1: A method for preparing a wood surface reversible switch is carried out according to the following steps:

[0019] 1. Mix boric acid, ammonium fluotitanate and distilled water, and magnetically stir for 10-30 minutes to obtain a mixed solution, then add dropwise a hydrochloric acid solution with a mass percentage of 1%-10% to the mixed solution to adjust the pH to 1-7 or drop Add 0.5%-10% sodium hydroxide aqueous solution to a pH of 7-14, then place the wood in the pH-adjusted mixture, and react at a temperature of 50°C-180°C for 1h-24h. Wash the reacted wood with ionized water, and dry it at a temperature of 40°C to 80°C for 8h to 24h to obtain wood with a hydrophilic surface;

[0020] The molar mass concentration of boric acid in the mixed solution is 0.0001mol / L-11mol / L; the molar mass concentration of ammonium fluotitanate in the mixed solution is 0.0001mol / L-11mol / L;

[0021] 2. Mix octadecyl trichlorosilane and absolute ethanol evenly, then put the w...

specific Embodiment approach 2

[0027] Embodiment 2: This embodiment is different from Embodiment 1 in that the wood described in step 1 is coniferous or broad-leaved. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the molar mass concentration of boric acid in the mixed solution described in step one is 0.0001mol / L~10mol / L; The molar mass concentration of ammonium fluotitanate in the mixed solution is 0.0001mol / L-10mol / L. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a wood surface hydrophilicity-hydrophobicity reversible switch, which relates to a method for preparing a surface hydrophilicity-hydrophobicity reversible switch. The method disclosed by the invention is used for solving the problems that an existing wood surface modification method cannot both have hydrophilicity and hydrophobicity and has no self-cleaning function. The method comprises the following steps: placing wood in a mixed solution of boric acid, ammonium titanium fluoride and distilled water to have a reaction to obtain wood having a hydrophilic surface, then, placing the wood having the hydrophilic surface in a mixed solution of octadecyltrichlorosilane and absolute ethyl alcohol to have a reaction to obtain wood having a hydrophobic surface, irradiating the wood having the hydrophobic surface under an ultraviolet lamp to obtain wood with hydrophilicity, and finally placing the wood with hydrophilicity in a dark place to obtain wood with hydrophobicity. The invention provides a method for preparing wood surface hydrophilicity-hydrophobicity reversible switch.

Description

technical field [0001] The invention relates to a preparation method of a surface affinity reversible switch. Background technique [0002] Surface wettability is one of the important properties of solid materials, and plays an important role in anti-fog, self-cleaning, photocatalysis, oil-water separation and other fields. The wettability of the material surface can be measured by the contact angle, the contact angle >90° is defined as hydrophobic, and the contact angle <90° is hydrophilic. Materials with special hydrophilic and hydrophobic surface properties play a key role in many industrial applications, so more and more researchers are committed to understanding and controlling the surface wettability behavior of materials. Wood is a material sensitive to environmental conditions. Its biological properties determine that it is prone to some problems in utilization, such as easy to absorb moisture and deform, easy to mold, easy to be corroded and insect-eaten, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/00
Inventor 李坚孙庆丰高丽坤卢芸万才超甘文涛
Owner NORTHEAST FORESTRY UNIVERSITY
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