Super-hydrophobic wood and preparation method thereof

A super-hydrophobic, wood technology, applied in wood treatment, impregnated wood, wood impregnation, etc., can solve the problems of weak function of super-hydrophobic wood, high biological toxicity of super-hydrophobic wood, poor abrasion resistance of super-hydrophobic wood, etc. The use range and reaction conditions are easy to achieve, and the effect of improving the added value of the product

Active Publication Date: 2015-09-23
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many defects in the existing treatment methods: 1. The process is complicated, the production cost is high, and the biotoxicity of the prepared superhydrophobic wood is high; 2. The rough structure constructed is fragile and cannot achieve the effect of lasting superhydrophobic; The superhydrophobic effect can be achieved on the cross-section of the

Method used

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  • Super-hydrophobic wood and preparation method thereof
  • Super-hydrophobic wood and preparation method thereof
  • Super-hydrophobic wood and preparation method thereof

Examples

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Example Embodiment

[0031] Example 1:

[0032] The super-hydrophobic wood of the present invention is covered with a composite film layer on the surface, and the composite film layer is hydrolyzed and polycondensed with vinyl triethoxysilane to coat nano SiO 2 Particles are formed by deposition; the composite film layer is chemically bonded to the wood through the action of hydroxyl groups; the composite film layer contains uniform 200nm-4um micron-level grooves and 30nm-60nm nano-level protrusions, and self-assembled with low surface energy vinyl Triethoxysilane. The contact angle of water droplets of superhydrophobic wood is 154°, and the rolling angle is close to 0°.

[0033] The preparation method of superhydrophobic wood in this embodiment includes the following steps:

[0034] 1) Soak the sawn wood [specification (L×R×T): 10mm×3mm×10mm] in 1wt% sodium hydroxide solution for 24h, and then put the soaked wood into deionized water for ultrasonic cleaning for 5min , And then dry the cleaned wood und...

Example Embodiment

[0040] Example 2:

[0041] The super-hydrophobic wood of the present invention is covered with a composite film layer on the surface, and the composite film layer is hydrolyzed and polycondensed with vinyl triethoxysilane to coat nano SiO 2 Particles are deposited and formed; the composite film layer is chemically bonded to the wood through the hydroxyl group; the composite film layer contains uniform 300nm~5um micron-level grooves and 50nm~80nm nanometer-level protrusions, and self-assembled with low surface energy substance vinyl three Ethoxysilane. The contact angle of water droplets of superhydrophobic wood is 151°, and the rolling angle is less than 4°.

[0042] The preparation method of superhydrophobic wood in this embodiment includes the following steps:

[0043] 1) Soak the sawn wood [specification (L×R×T): 30mm×30mm×3mm] in 3wt% sodium hydroxide solution for 18h, and then put the soaked wood into deionized water for ultrasonic cleaning for 10min , And then dry the cleaned...

Example Embodiment

[0048] Example 3:

[0049] The superhydrophobic wood of the present invention is uniformly covered with a composite film layer on the surface, and the composite film layer is hydrolyzed and polycondensed with vinyl triethoxysilane to coat nano-TiO 2 Particles are deposited and formed; the composite film layer is chemically bonded to the wood through the action of the hydroxyl group; the composite film layer contains uniform 500nm~4um micron-level grooves and 40nm~90nm nanometer-level protrusions, and self-assembled with low surface energy vinyl Triethoxysilane. The contact angle of water droplets of superhydrophobic wood is 153°, and the rolling angle is less than 4°.

[0050] The preparation method of superhydrophobic wood in this embodiment includes the following steps:

[0051] 1) Soak the sawn wood [specification (L×R×T): 10mm×10mm×3mm] in 5wt% sodium hydroxide solution for 12h, then put the soaked wood in deionized water and ultrasonically clean it for 15min , And then dry the...

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Abstract

The invention discloses super-hydrophobic wood. The surface of the super-hydrophobic wood is covered with a composite film layer which is formed by settling silane coupling agents which are wrapped by nano particles after hydrolysis and polycondensation. Chemical bonding is generated between the composite film layer and the wood through the hydroxyl action, and the composite film layer contains uniform micron-size grooves and nano-size protrusions and is assembled with low-surface-energy materials. The water drop contact angle of the super-hydrophobic wood reaches 150-156 degrees, and the rolling angle is smaller than 4 degrees. The nano particles are one or more kinds of nano SiO2, nano TiO2, nano Al2O3, nano ZnO and nano Fe3O4. According to a preparation method, alkali treatment is carried out on the wood firstly, and then reaction liquid containing hydrophobic materials deposits on the surface of the wood subjected to alkali treatment through a gas-phase deposition reaction, so that the super-hydrophobic wood is obtained. The super-hydrophobic wood is high in hydrolytic resistance. The steps of the preparation method are simple, the reaction conditions are easy to realize, and the preparation period is short.

Description

technical field [0001] The invention relates to the field of wood modification, in particular to a superhydrophobic wood and a preparation method thereof. Background technique [0002] As an ancient and young green and environmentally friendly material, wood is widely used in daily life, such as wooden houses, wooden boats, wood carvings, etc. Wood is mainly composed of cellulose, hemicellulose, lignin, etc. Cellulose and hemicellulose are rich in groups such as hydroxyl groups with strong hygroscopicity, so wood has strong water absorption, which makes it perishable and stable in size Poor sex. These properties of wood make the service life of wood restricted by many environmental factors, such as humid air, acid rain, etc. The superhydrophobic treatment of wood can endow the wood surface with multiple functions such as waterproof, antifouling, self-cleaning, and antibacterial, which will broaden the application range of wood in production and life, and prolong the servic...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/00B27K3/52B27K3/20B27K5/04
CPCB27K3/007B27K3/02B27K3/0207B27K3/20B27K3/52B27K5/0065B27K5/04B27K2240/20B27K2240/30B27K2240/60B27K2240/70B27K2240/90
Inventor 卿彦贾闪闪吴义强金春德孙庆丰李新功
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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