Method for preparing super hydrophobic timber

A super-hydrophobic, wood technology, applied in the direction of wood impregnation, wood impregnation, wood processing appliances, etc., can solve the problems of high energy consumption, high cost, complex process, etc., and achieve low energy consumption, low production cost, and simple process. Effect

Inactive Publication Date: 2010-10-27
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a method for preparing superhydrophobic wood in order to solve the problems of complex process, high energy consumption and high cost in the existing superhydrophobic wood preparation method

Method used

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  • Method for preparing super hydrophobic timber

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specific Embodiment approach 1

[0007] Embodiment 1: A method for preparing superhydrophobic wood in this embodiment is carried out according to the following steps: 1. Prepare potassium methyl silicate aqueous solution according to the concentration of potassium methyl silicate at 0.1% to 20% (mass); 2. Submerge the wood in the potassium methyl silicate aqueous solution prepared in step 1 for 5h to 30h; 3. Under the condition that the temperature of the potassium methyl silicate aqueous solution is kept at 10°C to 80°C, adjust the methyl silicate The pH value of the aqueous potassium solution is 9 to 13.5; 4. Pass carbon dioxide gas into the potassium methyl silicate aqueous solution, and stop feeding carbon dioxide gas when the pH value of the potassium methyl silicate aqueous solution is 7 to 8.8; 5. Stand still After 0.1h to 30h, put the wood in a vacuum drying oven, and dry it for 10min to 10h at a vacuum degree of 0.070MPa to 0.095MPa and a temperature of 40°C to 140°C to obtain superhydrophobic wood. ...

specific Embodiment approach 2

[0009] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the concentration of potassium methyl silicate in step 1 is 1%-18% (mass). Others are the same as in the first embodiment.

specific Embodiment approach 3

[0010] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the concentration of potassium methyl silicate in step 1 is 10% (by mass). Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing super hydrophobic timber, which relates to the preparation method for the hydrophobic timber and solves the problems of complex process, high energy consumption and high cost of a preparation method for the exiting super hydrophobic timber. The method comprises the following steps: 1, preparing aqueous solution of methyl potassium silicate; 2, immersing the timber in the aqueous solution of methyl potassium silicate for 5 to 30 hours; 3, adjusting the pH value of the aqueous solution of methyl potassium silicate to be 9 to 13.5 at the temperature of between 10 and 80 DEG C; 4, introducing carbon dioxide gas into the aqueous solution of methyl potassium silicate and stopping the introduction of the carbon dioxide gas when the pH value of the aqueous solution of methyl potassium silicate is between 7 and 8.8; and 5, standing the timber for 0.1 to 30 hours and drying the timber to obtain the super hydrophobic timber. The method has the advantages of simple process, no need of pressure treatment, no need of complex special equipment, low production cost and low energy consumption and is used for preparing the super hydrophobic timber.

Description

technical field [0001] The invention relates to a method for preparing hydrophobic wood. Background technique [0002] Superhydrophobic wood, the contact angle with water is greater than 150°, and the rolling angle is less than 10°. Because of its superhydrophobic surface properties, it not only has self-cleaning function, but also has insect-proof, anti-corrosion, flame-retardant and other properties , so that wood is developed from traditional improvement to biological improvement, and has a very wide application prospect in the fields of liquid loss-free transportation, self-cleaning, waterproof, and moisture-proof. The existing method of preparing superhydrophobic wood is to add wood and beeswax into the mold, heat to 80°C-100°C to melt the beeswax, and apply a pressure of 1MPa-50MPa to make the beeswax enter the micropores on the wood surface, cool Finally, the beeswax on the surface is scraped off to obtain superhydrophobic wood. However, this method requires heating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/20
Inventor 王成毓刘常瑜
Owner NORTHEAST FORESTRY UNIVERSITY
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