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Method for improving mechanical stability of super-hydrophobic film on wood surface

A technology of mechanical stability and wood surface, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of easy pollution of superhydrophobic surface, loss of superhydrophobicity, easy to fall off, etc. Good effect of mechanical friction and UV irradiation, stability and durability

Active Publication Date: 2016-05-11
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, inorganic nanoparticles (such as SiO 2 Nanospheres, ZnO nanorods) are mostly in point contact with the wood surface, and the nanoparticles and their aggregates are easy to fall off under the action of external force (friction, washing); in addition, dust and oily substances in the external environment are easy to contaminate the superhydrophobic surface, make it gradually lose its superhydrophobic properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Using tetrahydrofuran (THF) as a solvent, prepare an epoxy resin solution with a concentration of 40%, which is used to build an epoxy resin primer on the wood surface. A wooden block with a size of 20mm×20mm×20mm (radial×longitudinal×chordwise) was placed in absolute ethanol, ultrasonically cleaned for 10min to remove impurities and pollutants on the wood surface, and then dried at 103°C for 5h. Use the above epoxy resin solution to impregnate the wood for 10 minutes, repeat 3 times, and dry and cure at 80°C.

[0053] 0.5g of silicon dioxide (SiO 2 ) nanoparticles (particle size 10-20nm) were dispersed in 40ml tetrahydrofuran (THF), and 1g triethoxy-1H, 1H, 2H, 2H-heptadecafluorodecylsilane (FAS) was added, at 50°C Magnetic stirring was carried out for 2 h to obtain solution A.

[0054] Dissolve 1 g of epoxy resin in 10 ml of tetrahydrofuran, and stir magnetically for 20 min to obtain solution B.

[0055] Mix solution A and solution B, add 1 g of triethoxy-1H,1H,2H,...

Embodiment 2

[0060] Embodiment 2: According to the operation method and steps of Embodiment 1, the dip coating treatment method is changed to spray coating. The spray gun is perpendicular to the wood surface, at a distance of 10-15cm, spray for 5 seconds, wait for the coating to dry naturally for 30 seconds, then spray the next layer, and spray for a total of 10 times, then put the sprayed wood in an oven at 80°C to dry for 3 hours, and you can also get Superhydrophobic membrane with good mechanical stability. After the superhydrophobic wood has been repeatedly rubbed with sandpaper for 10 times, its superhydrophobic performance is still maintained. The contact angle of water droplets on the wood surface is about 152°, and the rolling angle is about 8°.

[0061] In a word, the present invention can make the wood treated by the method have a superhydrophobic surface with high mechanical strength, simple operation, easy realization, low cost for preparation and use, good stability and durabi...

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Abstract

The invention belongs to a method for improving mechanical stability of a super-hydrophobic film on a wood surface, which comprises the steps of: (1) coating the wood surface with a layer of transparent epoxy resin bottom layer to fill the concave structures on the wood surface so as to obtain a smooth surface; (2) preparing a silicon dioxide nanoparticle / epoxy resin / triethyloxy-1H,1H,2H,2H-heptadecyl fluoro decyl silane organic-inorganic composite coating solution; and (3) carrying out multiple immersion coating treatment on the wood provided with the epoxy resin bottom layer with the composite solution to obtain enough coating thickness, and heating for curing to obtain the super-hydrophobic wood. The wood treated by the method has the super-hydrophobic surface with high mechanical strength, and has good mechanical stability and durability. The method is used for solving the problems that the super-hydrophobic wood film layer prepared by the traditional method has poor stability and relatively short service life, is simple in operation, easy to realize and low in cost, can be used for scale production, and has good application prospects.

Description

technical field [0001] The invention belongs to a method for improving the mechanical stability of a wood surface superhydrophobic film. Background technique [0002] Wood is a renewable, recyclable and naturally degradable green material and biological resource. It has the advantages of beautiful texture, natural color, comfortable texture, good plasticity, and easy processing. However, wood also has some defects, such as dry shrinkage and wet swelling due to changes in moisture content, resulting in changes in the size and shape of components and reduction in strength, easy to mildew and decay, easy to be eaten by insects, easy to burn, etc. At present, the wood anticorrosion treatment mainly relies on coating the wood surface with waterproof and anticorrosion paint, but the adhesion between the paint layer and the wood surface is poor, and it is easy to fall off, so the effect is still unsatisfactory. [0003] A superhydrophobic surface is a surface with a water contact ...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/12B27K3/00B27K3/52B27K3/34B27K5/04C09D163/00C09D7/12
CPCB27K3/007B27K3/0214B27K3/12B27K3/343B27K3/52B27K5/04B27K2240/70C08K2201/003C08K2201/011C09D7/61C09D7/63C09D163/00
Inventor 王小青屠坤坤刘君良柴宇博孔丽琢
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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