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A kind of hydrophobic wood and preparation method thereof

A wood and water-repellent technology, applied in wood impregnation, wood treatment, impregnated wood, etc., can solve problems such as complex process, high cost, and thin hydrophobic layer

Active Publication Date: 2021-05-14
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above method, there are problems such as thin hydrophobic layer, poor surface hardness, complicated process, high cost and poor environmental protection.

Method used

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  • A kind of hydrophobic wood and preparation method thereof
  • A kind of hydrophobic wood and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of hydrophobic wood of the present embodiment, comprises the following steps:

[0029] (1) Wood pretreatment: Sand the surface of poplar wood with 180-mesh wood sandpaper, remove the surface dust with high-pressure air and dry it for later use; the wood used in this example is fast-growing poplar wood, with a size of 70 mm×50 mm×22 mm (diameter x chord x length).

[0030] (2) Hydrophobic material preparation: nano-SiO with a mass fraction of 1% 2 The powder is mixed with polypropylene wax powder, heated to 130 °C to melt the polypropylene wax, and stirred at a speed of 180 r / min to make the nano-SiO 2 The powder is evenly dispersed in polypropylene wax to obtain nano-SiO 2 / polypropylene wax melt; In the present embodiment, nano-SiO 2 The particle size of the powder is 350 nm.

[0031] (3) Hydrophobic treatment: soak the pretreated poplar in nano-SiO 2 / Polypropylene wax melt, at a temperature of 140 ℃ for hydrophobic treatment, so tha...

Embodiment 2

[0037] A kind of preparation method of hydrophobic wood of the present embodiment, comprises the following steps:

[0038] (1) Wood pretreatment: Sand the surface of poplar wood with 180-mesh wood sandpaper, remove the surface dust with high-pressure air and dry it for later use; the wood used in this example is fast-growing poplar wood, with a size of 70 mm×50 mm×22 mm (diameter x chord x length).

[0039] (2) Hydrophobic material preparation: nano-SiO with a mass fraction of 1% 2 The powder is mixed with polypropylene wax powder, heated to 130 °C to melt the polypropylene wax, and stirred at a speed of 180 r / min to make the nano-SiO 2 The powder is evenly dispersed in polypropylene wax to obtain nano-SiO 2 / polypropylene wax melt; In the present embodiment, nano-SiO 2 The particle size of the powder is 300 nm.

[0040] (3) Hydrophobic treatment: soak the pretreated poplar in nano-SiO 2 / Polypropylene wax melt, carry out hydrophobic treatment at 135 ℃ to make nano-SiO ...

Embodiment 3

[0045] A kind of preparation method of hydrophobic wood of the present embodiment, comprises the following steps:

[0046] (1) Wood pretreatment: Sand the surface of poplar wood with 180-mesh wood sandpaper, remove the surface dust with high-pressure air and dry it for later use; the wood used in this example is fast-growing poplar wood, with a size of 70 mm×50 mm×22 mm (diameter x chord x length).

[0047] (2) Hydrophobic material preparation: nano-SiO with a mass fraction of 2% 2 The powder is mixed with polypropylene wax powder, heated to 130 °C to melt the polypropylene wax, and stirred at a speed of 180 r / min to make the nano-SiO 2 The powder is evenly dispersed in polypropylene wax to obtain SiO 2 / polypropylene wax melt; In the present embodiment, nano-SiO 2 The particle size of the powder is 200 nm.

[0048] (3) Hydrophobic treatment: soak the pretreated poplar in nano-SiO 2 / Polypropylene wax melt, at a temperature of 140 ℃ for hydrophobic treatment, so that nan...

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Abstract

The invention discloses a method for preparing hydrophobic wood, which comprises the following steps: impregnating the dried and pretreated wood in nano-SiO 2 Hydrophobic treatment was carried out in the polypropylene wax solution to make nano-SiO 2 / Polypropylene wax melt penetrates into the wood, followed by hot pressing to densify the wood surface, and finally remove the SiO on the surface 2 / Polypropylene wax to get hydrophobic wood. The invention has the characteristics of simple preparation method, convenient operation, short preparation period, low cost, good environmental protection, and improved surface hardness and mechanical properties of the hydrophobic wood.

Description

technical field [0001] The invention relates to the field of wood function modification, in particular to a hydrophobic wood and a preparation method thereof. Background technique [0002] As a natural renewable resource, wood is easy to process and has good mechanical properties. It plays an important role in social and economic construction and the basic living environment of human beings. Wood is mainly composed of cellulose, hemicellulose, and lignin. Cellulose and hemicellulose contain a large number of hydrophilic groups, which makes wood exhibit extremely strong hygroscopicity and water absorption. After wood absorbs water, it is easy to cause dimensional deformation, decay and discoloration, and even degradation, which seriously affects the scope of use and service life. If the wood is endowed with hydrophobic properties, it can isolate the wood from contact with moisture, improve some defects of the wood, and expand the application range and service life of the woo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/00B27K3/52B27M1/08B27K3/02
CPCB27K3/007B27K3/025B27K3/52B27K2240/70B27M1/08
Inventor 孙德林王张恒余拓耿一豪唐璇
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY