Preparation method of high-hydrophobicity and self-cleaning wood

A self-cleaning, wood-based technology, applied in wood treatment, impregnation of wood, wood impregnation, etc., can solve the problems of complex treatment process, change of wood color, high toxicity of modifiers, etc., and achieve good mechanical properties, strong anti-corrosion performance, and stable dimensions good sex effect

Inactive Publication Date: 2016-06-15
泗洪新创源木业有限公司
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Problems solved by technology

[0010] The present invention aims to solve the problems of high toxicity, peculiar smell, change of wood color, complicated treatment process and only single performance of wood in existing wood modification methods. Inspired by the self-cleaning properties caused by the micro-nano structure of lotus leaves And provide a kind of preparation method of high hydrophobicity self-cleaning characteristic wood, its hydrophobic contact angle can be as high as more than 140 °, rolling angle is less than 20 °

Method used

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  • Preparation method of high-hydrophobicity and self-cleaning wood
  • Preparation method of high-hydrophobicity and self-cleaning wood

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specific Embodiment approach 1

[0035]The preparation method of the highly hydrophobic self-cleaning characteristic wood of the present embodiment is carried out according to the following steps: 1. Weigh 49% to 99% of fluorine-containing polymerizable monomers, 0 to 40% of unsaturated monomers, 0.5 %~10% fluorine-containing modified nano POSS particles and 0.5%~1% initiator, then stir and dissolve the nano POSS particles in tetrahydrofuran (POSS accounts for 10wt% by weight of THF), and finally mix the above raw materials evenly , to obtain the impregnation solution; 2. Add the wood and the impregnation solution obtained in step one to the reaction tank, and immerse the wood in the impregnation solution. After the reaction tank is sealed, air is introduced into it to make the pressure in the reaction tank Reach 0.8MPa~1MPa, and keep it for 20min~30min; 3. Reduce the pressure of the reaction tank to normal pressure, take out the wood, then wrap the impregnated wood with aluminum foil, and place it at room tem...

specific Embodiment approach 2

[0038] The difference between this embodiment and specific embodiment 1 is that in step 1, 54.1% to 94.4% of fluorine-containing polymerizable monomers, 2.5% to 40% of unsaturated monomers, 2.5% to 5% of Fluorine modified nano POSS particles and 0.6% to 0.9% initiator. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0039] The difference between this embodiment and the specific embodiment one is that in step one, 79.2% of fluorine-containing polymerizable monomers, 10% of unsaturated monomers, 10% of fluorine-containing modified nano POSS particles and 0.8% initiator. Others are the same as in the first embodiment.

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Abstract

The invention discloses a preparation method of a high-hydrophobicity and self-cleaning wood and aims at mainly solving the problems that a modifying agent used in the existing wood modifying method is high in toxicity and capable of changing the color of the wood and has odor, the treatment process is complex, and only the single performance of the wood can be improved. The method comprises the steps of mixing fluorine-containing polymerizable monomer, an unsaturated monomer, fluorine-containing modified POSS nanoparticles, a tetrahydrofuran solvent and an initiator to obtain an impregnation liquid; and then, adding the wood and the impregnation liquid into a reaction tank, carrying out pressurization treatment to inject the impregnation liquid into a wood pore structure, then, wrapping a test piece and aging at room temperature and normal pressure, and next, carrying out heating treatment and vacuum drying to obtain the high-hydrophobicity and self-cleaning wood. The method is simple, the color of the wood is not changed, no odor is generated, the parallel-to-grain compressive strength is 70-98MPa, and the anti-expansion rate obtained after the wood is continuously soaked for 200h reaches up to more than 65%; and the weight loss ratio obtained after the wood is eroded by fungi for 12 weeks reaches up to less than 6%, the water contact angle can be up to more than 140 DEG, the rolling angle is smaller than 20 DEG, and the high-hydrophobicity and self-cleaning wood can be widely used as an indoor / outdoor structural material and a decorative material.

Description

technical field [0001] The invention relates to a wood modification method, in particular to a method for preparing wood with high hydrophobicity and self-cleaning properties, and belongs to the technical field of wood processing. Background technique [0002] Because of its unique composition and honeycomb porous structure, wood is prone to swelling and deformation caused by water absorption, cracking and warping caused by water decomposition, decay and degradation caused by fungus erosion, and combustion degradation caused by heat. In order to prolong the service life of wood and improve its durability, people modify natural wood. The existing methods for wood modification are as follows: [0003] 1. Utilize vinyl monomers (Chinese patent application number 200710072699.2) or heterocyclic polymerizable monomers (international patent publication number CN1671526A in China) to form polymers to treat wood to improve the mechanical properties of wood. The modifier used in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/00B27K3/08B27K3/50
CPCB27K3/007B27K3/08B27K3/50B27K2240/70
Inventor 李苍海李永峰
Owner 泗洪新创源木业有限公司
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