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Preparation method of novel hydrophobic wood

A hydrophobic, wood-based technology that is used in wood treatment, wood impregnation, wood impregnation, etc. to achieve a wide range of effects

Inactive Publication Date: 2013-09-18
GUANGDONG YIHUA TIMBER IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is only through the chemical reaction between AKD and the cellulose in the wood, which has hydrophobicity on the inner cell wall of the wood, so that the surface of the wood and the interior of the wood have certain hydrophobic characteristics.

Method used

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  • Preparation method of novel hydrophobic wood

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preparation example Construction

[0018] The preparation method of novel hydrophobic wood of the present invention comprises the following steps:

[0019] (1) The alkyl ketene dimer colloids are melted at 40°C-60°C, then a certain amount of cationic starch, emulsifier, and water are added, and the mass concentration is 0.01%-10% after being processed by a high-pressure homogenizer The alkyl ketene dimer emulsion, standby;

[0020] (2) Mix the alkyl ketene dimer emulsion with a mass concentration of 0.01%-10% and the nanocellulose gel with a mass concentration of 0.5%-20% in a weight ratio of (1-5):1 , and high-speed stirring to prepare a composite emulsion, set aside.

[0021] (3) Put the wood into the reaction tank, seal the reaction tank and evacuate to -0.13Mpa~-0.09MPa, and keep the negative pressure for 15min-60min.

[0022] (4) Inject the composite emulsion obtained in step (2) into the reaction tank in a vacuum state, and immerse the wood in the composite emulsion, keep the vacuum state for 15min-60mi...

Embodiment 2

[0037] Embodiment two: The preparation method of the new superhydrophobic wood described in this embodiment is carried out according to the following steps: 1. According to the melting of the alkyl ketene dimer (AKD) colloidal particles at 50°C, a certain amount of sodium dodecylsulfonate is added and quaternary aluminum salt cationic starch and water, wherein the weight ratio is cationic starch: emulsifier: AKD colloid: water=4.9:0.1:8:87, and the emulsion is obtained through high-pressure homogenizer treatment; 2. According to the alkyl The mass concentration of ketene dimer (AKD) is 0.2%, and the mass concentration of nanocellulose gel is 1%. High-speed stirring and blending are used to configure the composite emulsion; 3. Inject the composite emulsion obtained in step 2 under vacuum, and make Immerse the wood in the composite emulsion, remove the vacuum and return to normal pressure for 60 minutes; 4. Take out the wood, drain the composite emulsion, and dry it in an oven ...

Embodiment 3

[0040] Embodiment three: The preparation method of novel superhydrophobic wood described in the present embodiment is carried out in the following steps:

[0041] 1. According to the melting of alkyl ketene dimer (AKD) colloidal particles at 60°C, a certain amount of sodium dodecylsulfonate, quaternary aluminum salt cationic starch and water are added, and the weight ratio is cationic starch: Emulsifier: AKD Colloidal Particles: Water = 3:2:6:89, processed by a high-pressure homogenizer to obtain an emulsion. 2. The mass concentration of alkyl ketene dimer (AKD) is 0.4%, and the mass concentration of nanocellulose gel is 5%. High-speed stirring and blending are used to configure the composite emulsion. 3. Put the wood in the reaction tank, seal the reaction tank and evacuate to -0.09MPa, and keep it for 30 minutes; 4. Inject the composite emulsion obtained in step 2 under vacuum, and immerse the wood in the composite emulsion to release Vacuum return to normal pressure and ...

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Abstract

The invention relates to a preparation method of a novel hydrophobic wood. The preparation method comprises the following steps of: firstly, melting alkyl ketene dimer colloidal particles at 40-60 DEG C; then adding a certain amount of cationic starch and an emulsifying agent and water; preparing an alkyl ketene dimer emulsion through treatment with a high-pressure homogenizer, and then blending the alkyl ketene dimer emulsion with a certain amount of nano cellulose gel to prepare a composite emulsion; then putting the wood and the composite emulsion into a reaction tank, vacuumizing and then injecting the emulsion for a period of time; taking the wood out, draining off the composite, and drying in a drying oven for 3-8 hours to obtain the novel hydrophobic wood. The preparation method is simple in process, causes no changes to the color of the wood and no corrosion to equipment, and is low in energy consumption, and the product does not have peculiar smells and can be widely used as indoor and outdoor furniture base materials and decorative materials.

Description

technical field [0001] The invention relates to the field of wood production and modification, in particular to a method for preparing hydrophobic wood. Background technique [0002] Wood is mainly a polymer material composed of cellulose, hemicellulose and lignin. Due to the structure of wood itself, wood has the characteristics of hygroscopic expansion, resulting in the defect of poor dimensional stability of wood in some environments. There are many ways to improve dimensional stability, such as: coating the outer surface with waterproof materials; filling wood cell walls with expansion agents; replacing hydroxyl groups on wood cellulose and lignin with less polar groups to change the chemical composition of wood Carry out chemical cross-linking etc. between the structural unit of wood composition, but existing these methods that improve wood hydrophobicity mostly exist preparation process complexity, energy consumption is big, product has peculiar smell and corrosion equ...

Claims

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Application Information

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IPC IPC(8): B27K3/08B27K3/50B27K5/04C08B15/02C08J3/075
Inventor 吴燕张碧莲杨蕊黄琼涛吴智慧孙宏南关惠元杨波刘丹丹王洁
Owner GUANGDONG YIHUA TIMBER IND
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