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Super-hydrophobic wood and preparation method thereof

A super-hydrophobic, wood technology, applied in the direction of impregnating wood, wood impregnation, wood processing appliances, etc., can solve the problems of complex process, expensive low surface energy substances, etc., achieve simple steps, easy reaction conditions, and good aging resistance. Effect

Active Publication Date: 2015-03-25
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing treatment methods are not only complicated in process, but also relatively expensive in the use of low surface energy materials

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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A superhydrophobic wood of the present invention, the wood surface is a polyvinyl alcohol film layer, and the surface of the polyvinyl alcohol film layer is covered with uniform TiO 2 / SiO 2 Nanostructured composite film layer, TiO 2 / SiO 2 The nanostructures are chemically bonded to the wood / polyvinyl alcohol composite surface through hydroxyl interactions, TiO 2 / SiO 2 The nanostructured composite film layer contains uniform 10-50μm-level grooves and 50-100nm-level protrusions, and is self-assembled with a low surface energy substance vinyltriethoxysilane. The water droplet contact angle of superhydrophobic wood reaches 152°, and the rolling angle less than 5°.

[0032] The preparation method of the superhydrophobic wood of the present embodiment, comprises the following steps:

[0033] (1) Soak the sawn wood in a 3% sodium hydroxide solution for 12 hours, wash it with deionized water under ultrasonic conditions for 10 minutes, then dry the cleaned wood under vac...

Embodiment 2

[0041] A superhydrophobic wood of the present invention, the wood surface is a polyvinyl alcohol film layer, and the surface of the polyvinyl alcohol film layer is covered with uniform TiO 2 / SiO 2 Nanostructured composite film layer, TiO 2 / SiO 2 The nanostructures are chemically bonded to the wood / polyvinyl alcohol composite surface through hydroxyl interactions, TiO 2 / SiO 2 The nanostructured composite film layer contains uniform 30-70μm-level grooves and 20-50nm-level protrusions, and is self-assembled with low surface energy substance methyltrimethoxysilane. The water droplet contact angle of superhydrophobic wood reaches 151°, and the rolling angle is less than 5°.

[0042] The preparation method of the superhydrophobic wood of the present embodiment, comprises the following steps:

[0043] (1) Soak the sawn wood in 8% sodium hydroxide solution for 14 hours, clean it with deionized water under ultrasonic conditions for 15 minutes, then dry the cleaned wood under va...

Embodiment 3

[0051] A superhydrophobic wood of the present invention, the wood surface is a polyvinyl alcohol film layer, and the surface of the polyvinyl alcohol film layer is covered with uniform TiO 2 / SiO 2 Nanostructured composite film layer, TiO 2 / SiO 2 The nanostructures are chemically bonded to the wood / polyvinyl alcohol composite surface through hydroxyl interactions, TiO 2 / SiO 2 The nanostructured composite film layer contains uniform grooves of 50-80 μm and protrusions of 30-100 nm, and is self-assembled with low surface energy substance hexadecyl triethoxysilane. The water droplet contact angle of superhydrophobic wood reaches 153°, The roll angle is less than 5°.

[0052] The preparation method of the superhydrophobic wood of the present embodiment, comprises the following steps:

[0053] (1) Soak the sawn wood in a 5% sodium hydroxide solution for 13 hours, clean it with deionized water for 20 minutes under ultrasonic conditions, then dry the cleaned wood under vacuum ...

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Abstract

The invention provides super-hydrophobic wood and a preparation method thereof. A polyvinyl alcohol film layer is arranged on the surface of a wood body, the surface of the polyvinyl alcohol film layer is coated with a uniform TiO2 / SiO2 nano structural composite film layer, a TiO2 / SiO2 nano structure is chemically bonded with a wood / polyvinyl alcohol composite surface under the effect of hydroxyl, the TiO2 / SiO2 nano structural composite film layer comprises uniform micron-sized grooves and nanoscale bulges, the TiO2 / SiO2 nano structural composite film layer is also provided with low surface energy substances in an assembling manner, a water droplet contact angle of the super-hydrophobic wood can be 153 degrees, and a rolling angle is less than 5 degrees. The preparation method of the super-hydrophobic wood has characteristics that the procedures are simple and the reaction condition is prone to realize; moreover, the super-hydrophobic wood can be prepared in a reaction manner in large scale, the subsequent decoration of the low surface energy substances is not needed, the reaction condition is easy to control, the cost is relatively low, and the cleanliness and no pollution can be realized. The prepared super-hydrophobic wood also has the good anti-aging property while having the super-hydrophobic property.

Description

technical field [0001] The invention relates to the field of wood modification, in particular to superhydrophobic wood and a preparation method thereof. Background technique [0002] Wood is environmentally friendly, renewable and easy to process, so it is widely used in social and economic construction and human living environment. Wood is mainly composed of cellulose, hemicellulose, lignin and extracts. Glucose and other monosaccharides in cellulose and hemicellulose have a large number of hydrophilic groups, so that wood shows extremely strong water absorption. sex. After the wood absorbs water, it is easy to cause dimensional deformation, decay, and fungus erosion, which seriously reduces the use value of wood, limits the scope of use, and shortens the service life. Superhydrophobic treatment of wood will endow wood with strong hydrophobic ability, thereby significantly improving the dimensional stability of wood. At the same time, it also has multiple functions such a...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/15B27K3/52
CPCB27K3/02B27K3/15B27K3/52
Inventor 吴义强刘明卿彦张新荔罗莎
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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