Overall hydrophobic timber and preparation method thereof

A wood and hydrophobic technology, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of high price, difficult industrialization, complicated preparation process, etc., and achieve easy realization of reaction conditions, short preparation period, and good controllability. Effect

Active Publication Date: 2016-06-22
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the preparation process of these existing methods is complex, expensive, and difficult to industrialize
On the other hand, a large number of studies have focused on the superhydrophobic construction of wood surfaces, that is, the construction of a s

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method for integral hydrophobic wood, comprising the steps of:

[0030] (1) Place the sawn fast-growing poplar (specification R×T×L: 20mm×20mm×10mm) in a Soxhlet extractor, and extract it with a mixture of toluene, acetone and ethanol at a volume ratio of 4:1:1 Extract the wood for 8 hours, take out the wood and place it in an electric blast drying oven, dry it at 105±2°C, and set it aside;

[0031] (2) Dissolve 40g of octadecyl isocyanate in 360g of anhydrous dimethylformamide, then place the dried wood in the mixed solution of the two, vacuum impregnate for 30min, and then introduce the wood together with the mixed solution into the reactor , at 100°C for 8 hours;

[0032] (3) Take out the wood from the reaction kettle, place it in a Soxhlet extractor, extract it with a mixed extract of toluene, acetone, and ethanol at a volume ratio of 4:1:1, and extract the wood for 8 hours. Take out the wood and dry it at 105±2°C Instantly.

Embodiment 2

[0034] A kind of preparation method of overall hydrophobic wood, with embodiment 1, its difference is only: (1) the specification of wood is R * T * L: 20mm * 20mm * 20mm; (2) in the mixed solution of step (2) add There are 4g (1%) dibutyltin dilaurate.

Embodiment 3

[0036] A kind of preparation method of overall hydrophobic wood, with embodiment 1, its difference is only: the consumption of anhydrous dimethylformamide is 400g.

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PUM

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Abstract

The invention relates to a preparation method of an overall hydrophobic timber. The timber is dipped by using alkyl isocyanate and dimethylformamide mixed solution, so that alkyl is grafted to a cell wall of the timber through a carbamate key. The method uses a self micron/nanometer roughness structure of the timber as basis, and grafts the alkyl to the cell wall of the timber through the carbamate key to form a low-surface-energy substance; a surface water drop contact angle thereof is about 147-151 degrees; the timber is sawn off in the cross section direction; and a water drop contact angle on the internal surface is about 147 degrees. The overall hydrophobic timber has the performances of mechanical wear resistance and chemical corrosion resistance; and in addition, the related preparation method is simple in steps, excellent in controllability, short in preparation period and easy to realize reaction conditions.

Description

technical field [0001] The invention relates to the technical field of wood, in particular to an integral hydrophobic wood, and also to a preparation method of the integral hydrophobic wood. Background technique [0002] Inspired by the lotus leaf effect in nature, superhydrophobic surfaces (contact angles between solid surfaces and water droplets greater than 150°) have attracted widespread attention due to their excellent water resistance, anti-fog, anti-icing, anti-corrosion and self-cleaning properties. application prospects. [0003] In the past few decades, a variety of matrix materials have been used to prepare superhydrophobic surfaces, such as metals, glass, paper, fabrics, and polymers. Unlike the above-mentioned materials, wood itself is a kind of superhydrophobic surface The heterogeneous materials composed of cellulose, hemicellulose and lignin form the original micro / nano structure because of their own anatomical structure and porosity. [0004] As we all kno...

Claims

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Application Information

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IPC IPC(8): B27K3/50B27K3/08
CPCB27K3/08B27K3/50B27K2240/70
Inventor 王开立张世锋李建章董友明张伟韩春蕊
Owner BEIJING FORESTRY UNIVERSITY
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