Preparation method of superhydrophobic wood sponge

A water wood and sponge technology, applied in the field of preparation of super-hydrophobic wood sponge, can solve the problems of poor environmental compatibility, complicated preparation process, secondary pollution, etc., and achieve the effects of low cost, improved hydrophobic performance, and good oil absorption characteristics.

Inactive Publication Date: 2019-11-26
BEIJING FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, people have found that many traditional oil absorption methods such as combustion and centrifugal separation often have problems such as low efficiency and secondary pollution, and adsorption materials are considered to be the most effective and economical method.
However, airgel and other three-dimensional (3D) porous oil spill adsorption materials have gradually attracted widespread attention in the application of oil spill adsorption due to their large specific surface area and high porosity, and more and more similar materials have appeared one after another. , such as silicon sponge, etc., but their preparation process is very complicated, and the environmental compatibility is poor

Method used

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  • Preparation method of superhydrophobic wood sponge
  • Preparation method of superhydrophobic wood sponge
  • Preparation method of superhydrophobic wood sponge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 prepares superhydrophobic wood sponge (1)

[0032] 1. Preparation of Experimental Materials and Reagents

[0033] Balsa wood, balsa wood, density 83.85 mg / cm 3 , sawn into small pieces of 15mm (L) * 15mm (W) * 15mm (H), the lignin content is 27.2%, and the hemicellulose content is 15.1%. Dry at 60°C until its mass does not change, and the mass of each piece is about 0.283g.

[0034] Prepare 2.5mol / L NaOH solution, 0.4mol / L NaOH solution 2 SO 3 solution and a 1% sodium chlorite aqueous solution. Wherein, the pH of sodium chlorite is adjusted to 4.6 with 30% acetic acid after the preparation is completed, and the pH meter is used for monitoring, and the preparation is sealed with a plastic wrap for preservation.

[0035] 2. Vacuum the balsa wood block with a vacuum drying oven for 10 minutes, and then mix the prepared NaOH solution with Na 2 SO 3 The solutions were mixed at a volume ratio of 1:1, and the test materials were treated with an electric fur...

experiment example 1

[0042] Experimental example 1 Performance testing of balsa wood before and after hydrophobic modification

[0043] (1) Morphological changes of balsa wood materials during delignification treatment

[0044] figure 1 It is the photo of the balsa wood material in each step of delignification in Example 1: a. the original wood block, b. the wood block after step 2 treatment, c. the wood block after step 3 treatment.

[0045] Such as figure 1 a. figure 1 b and figure 1 As shown in c, use NaOH / Na 2 SO 3 After the mixed solution is used to delignify the original balsa wood block, it can be found that the color of the wood block is darker than the light yellow color of the original wood block. NaClO 2 After the treatment of the aqueous solution, the color of the wood block gradually changed to milky white.

[0046] It can be seen from the figure that after the lignin removal treatment, the size of the wood block is reduced by about 33%, and the shape is basically kept good, w...

Embodiment 2

[0072] Embodiment 2 prepares superhydrophobic wood sponge (two)

[0073] 1. Preparation of Experimental Materials and Reagents

[0074] Balsa wood, balsa wood, density 83.85 mg / mm 3 , sawn into small pieces of 15mm (L) * 15mm (W) * 15mm (H), the lignin content is 27.2%, and the hemicellulose content is 15.1%. Dry at 60°C until its mass does not change, and the mass of each piece is about 0.283g.

[0075] Prepare 2.5mol / L NaOH solution, 0.4mol / L NaOH solution 2 SO 3 solution and a 1% sodium chlorite aqueous solution. Wherein, the pH of sodium chlorite is adjusted to 4.6 with 30% acetic acid after the preparation is completed, and the pH meter is used for monitoring, and the preparation is sealed with a plastic wrap for preservation.

[0076] 2. Vacuum the balsa wood block with a vacuum drying oven for 10 minutes, and then mix the prepared NaOH solution with Na 2 SO 3 The solutions were mixed at a volume ratio of 1:1, and the test materials were treated with an electric f...

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Abstract

A preparation method of superhydrophobic wood sponge comprises the following steps: mixing a NaOH solution having a concentration of 2.3-2.6 mol / L with a Na2SO3 solution having a concentration of 0.3-0.5 mol / L according to a volume ratio of 1:1, immersing dried light wood blocks in the obtained mixed solution, and processing the wood under a boiling condition for 18-26 h; then immersing the wood into a sodium chlorite solution having a concentration of 1-2%, performing heating in a water bath at 80-95 DEG C, rinsing the wood, and freeze-drying the rinsed wood; and immersing the wood in a mixedsolution of ethanol, water, glacial acetic acid and methyltrimethoxysilane, processing the wood at 20-40 DEG C for 3-6 h, taking out the wood, carrying out vacuum drying at 30-70 DEG C for 1-2 h, anddrying the obtained wood at 90-130 DEG C. The superhydrophobic wood sponge prepared by the method has the advantages of high hydrophobicity, high porosity and strong adsorption performance, and can be used as an oil spill adsorption material to adsorb and purify polluted water.

Description

technical field [0001] The invention relates to a method for preparing a superhydrophobic wood sponge, in particular to a method for preparing a superhydrophobic wood sponge by hydrophobically modifying balsa wood. Background technique [0002] In recent years, with the discharge of industrial wastewater and oil spills, both the water body and the ecological environment have been seriously polluted, and the methods currently used for oil spill cleanup mainly include in-situ combustion, dispersant dispersion, and the use of adsorbents. But it is found that many traditional oil absorption methods such as combustion and centrifugal separation often have problems such as low efficiency and secondary pollution, and adsorption materials are considered to be the most effective and economical method. However, airgel and other three-dimensional (3D) porous oil spill adsorption materials have gradually attracted widespread attention in the application of oil spill adsorption due to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/02B27K3/32B27K3/00B27K5/00B27K3/20B27K3/50B27K5/04
CPCB27K3/005B27K3/0214B27K3/025B27K3/20B27K3/32B27K3/50B27K5/0005B27K5/0085B27K5/04B27K2240/70
Inventor 黄艳辉刘颖李帆皇权飞
Owner BEIJING FORESTRY UNIVERSITY
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