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Preparation method for super-hydrophobic bamboo/wood

A technology of wood and water bamboo, which is applied in the field of superhydrophobic bamboo/wood preparation, can solve problems such as single method, high cost, and unstable structure, and achieve the effect of high surface roughness, high static contact angle, and excellent waterproof effect

Inactive Publication Date: 2018-12-11
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of traditional bamboo and wood materials such as deformation, discoloration, and rot caused by water absorption, and to overcome the defects of existing bamboo and wood super-hydrophobic surface construction methods, single structure, unstable structure and high cost. A preparation method of bamboo / wood with superhydrophobic properties, which can conveniently and effectively produce bamboo and wood products with good waterproof effect

Method used

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  • Preparation method for super-hydrophobic bamboo/wood

Examples

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preparation example Construction

[0017] A preparation method of superhydrophobic bamboo / wood, comprising the following steps:

[0018] (1) Dry the bamboo and wood until the water content is 6-8%, then immerse them in a toluene-ethanol mixture with a mass ratio of (1-3):1 and vacuum soak for 24 hours, take them out and dry them to dryness, and then Ultrasonic cleaning in absolute ethanol for 15 to 30 minutes, and finally vacuum drying at 80 to 100°C for 1 to 2 hours, and put it in a vacuum desiccator for later use;

[0019] (2) Add 0.02M zinc acetate dihydrate crystal particles into 300mL diethylene glycol, stir at room temperature until completely dissolved, stir and heat to 160°C, keep constant temperature reaction for 4 hours, stop, cool to room temperature, and centrifuge to obtain ZnO nanoparticles, then ultrasonically cleaned with absolute ethanol for 10-20 minutes, repeating the above process 2-4 times, finally centrifuged and dried to obtain spherical ZnO nanoparticles with a diameter of 100-200nm;

...

Embodiment 1

[0029] A preparation method of superhydrophobic bamboo, comprising:

[0030] (1) Dry the bamboo to a moisture content of 8%, then immerse it in a toluene-ethanol mixture (mass ratio: 2:1) and vacuum soak for 24 hours, take it out, dry it to absolute dryness, and then ultrasonically clean it in absolute ethanol for 15 minutes , and finally vacuum-dried at 80°C for 2 hours, and placed in a vacuum desiccator for later use;

[0031] (2) Add 0.02M zinc acetate dihydrate crystal particles into 300mL diethylene glycol, stir at room temperature until completely dissolved, stir and heat to 160°C, keep constant temperature for 4 hours, stop, cool to room temperature and centrifuge to obtain ZnO nanoparticles were then ultrasonically cleaned with absolute ethanol for 15 minutes, and this process was repeated three times, and finally centrifuged and dried to obtain spherical ZnO nanoparticles with a diameter of 100-200 nm;

[0032] (3) Disperse the spherical ZnO nanoparticles prepared in...

Embodiment 2

[0037] A preparation method of super-hydrophobic poplar wood, comprising:

[0038] (1) Dry the poplar wood to a moisture content of 6%, then immerse it in a toluene-ethanol mixture (mass ratio: 3:1) and vacuum soak for 24 hours, take it out, dry it until it is absolutely dry, and then ultrasonically clean it in absolute ethanol 10min, and finally vacuum-dried at 80°C for 2h, and placed in a vacuum desiccator for later use;

[0039] (2) Add 0.02M zinc acetate dihydrate crystal particles into 300mL diethylene glycol, stir at room temperature until completely dissolved, stir and heat to 160°C, keep constant temperature reaction for 4 hours, stop, cool to room temperature, and centrifuge to obtain ZnO nanoparticles, then ultrasonically cleaned with absolute ethanol for 15 minutes, repeating this process 3 times, finally centrifuged and dried to obtain spherical ZnO nanoparticles with a diameter of 100-200nm;

[0040] (3) Disperse the spherical ZnO nanoparticles prepared in step (...

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Abstract

The invention discloses a preparation method for super-hydrophobic bamboo / wood. The preparation method comprises the following steps: drying bamboo and wood, soaking the dried bamboo and wood into a methylbenzene-alcohol mixed solution and vacuumizing, soaking, drying, ultrasonically cleaning and drying in vacuum for later use; preparing spherical ZnO nano-particles, and dispersing the spherical ZnO nano-particles into absolute ethyl alcohol, dropwise adding to the surfaces of bamboo and wood to form a spherical ZnO nano particle thin layer; continuously reacting to form spindle shaped ZnO nano-particles, taking out to cool, clean and dry, and vacuum drying to obtain a bamboo and wood product with a super-hydrophobic function. The preparation method has the advantages that: firstly, metaloxides are easier to deposit to form a surface layer by removing extracted components on the surface, so that waterproof properties of bamboo and wood are greatly improved; and secondly, a two-step process is adopted to construct ZnO nano-particles of different shapes on the surfaces of bamboo and wood; and the ZnO nano-particles are tightly arranged, are high in surface roughness, and are excellent in waterproof effect.

Description

technical field [0001] The invention relates to a method for preparing superhydrophobic bamboo / wood, which belongs to the technical field of bamboo and wood processing. Background technique [0002] Bamboo and wood are natural and environmentally friendly renewable materials, which are widely used in various fields of human life. Because bamboo and wood have strong moisture absorption and water absorption characteristics, it is easy to cause their size to deform, and there are problems such as decay and discoloration, which affect Value of use and limited scope of use. There are a large number of superhydrophobic surfaces in nature, and this surface characteristic has broad application prospects in the fields of waterproofing, moisture-proofing, liquid transportation, and self-cleaning. Therefore, superhydrophobicity is gradually introduced into the field of bamboo and wood surface functional modification, endowing it with strong hydrophobic ability, greatly improving the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K3/50B27K5/04B27K3/00B27K3/12B27K9/00
Inventor 何文杨阳吴波芦梦婷许斌程大莉李泽
Owner NANJING FORESTRY UNIV
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