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High-hydrophobicity wood sponge with electric-thermal conversion capability as well as preparation method and application thereof

A high hydrophobicity, electrothermal conversion technology, used in wood treatment, impregnating wood, manufacturing tools, etc., can solve problems such as practical application limitations, blockage of material channels, poor crude oil fluidity, etc. The effect of fast electrothermal conversion capability

Inactive Publication Date: 2020-06-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these hydrophobic and superhydrophobic materials can only be used to separate low-viscosity oils and organic solvents from water
When using these materials to separate high-viscosity crude oil in water, due to the poor fluidity of crude oil, it is easy to block the material channel, so its practical application is limited

Method used

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  • High-hydrophobicity wood sponge with electric-thermal conversion capability as well as preparation method and application thereof
  • High-hydrophobicity wood sponge with electric-thermal conversion capability as well as preparation method and application thereof
  • High-hydrophobicity wood sponge with electric-thermal conversion capability as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of highly hydrophobic wood sponge with electrothermal conversion ability, comprising the following steps:

[0033] 1) Prepare a sodium hypochlorite solution with a mass concentration of 2%, adjust the pH value to 3.5 with acetic acid, heat up to 100° C. 3 The balsa wood (balsa wood is also called balsa wood) is taken out after immersion treatment for 12 hours to remove the lignin component.

[0034] 2) preparing a sodium hydroxide solution with a mass concentration of 8% and raising the temperature to 80° C., immersing the balsa wood treated in step 1) for 12 hours and taking it out to remove the hemicellulose component;

[0035] 3) Take out the balsa wood treated in step 2) and wash it with water, freeze it at -15°C for 1 hour, then freeze-dry it at -50°C for 12 hours, put the obtained balsa wood into the aqueous solution of graphene oxide and ascorbic acid for 30 minutes Take out, the mass concentration of graphene oxide in the aqueous solution o...

Embodiment 2

[0045] A preparation method of highly hydrophobic wood sponge with electrothermal conversion ability, comprising the following steps:

[0046] 1) Prepare a sodium hypochlorite solution with a mass concentration of 6%, adjust the pH value to 4 with formic acid, heat up to 85° C. 3 The balsa wood was soaked for 12 hours and then taken out to remove lignin components.

[0047] 2) preparing a sodium hydroxide solution with a mass concentration of 12% and raising the temperature to 95° C., soaking the treated balsa wood in step 1) for 8 hours and taking it out to remove the hemicellulose component;

[0048] 3) After washing the balsa wood treated in step 2), first freeze it at -5°C for 3h, then freeze-dry it at -50°C for 24h, put the obtained balsa wood into an aqueous solution of graphene oxide and ascorbic acid (graphite oxide The mass concentration of alkene is 1%; the mass ratio of ascorbic acid and graphene oxide is 0.3:1) after soaking for 300min, take it out, and then place...

Embodiment 3

[0054] A preparation method of highly hydrophobic wood sponge with electrothermal conversion ability, comprising the following steps:

[0055] 1) Prepare a sodium hypochlorite solution with a mass concentration of 1%, adjust the pH value to 3 with hydrochloric acid, heat up to 100°C, and prepare a solution with a size of 10mm×10mm×10mm and a density of 120mg / cm 3 The balsa wood was soaked for 6 hours and then taken out to remove the lignin components.

[0056] 2) preparing a sodium hydroxide solution with a mass concentration of 7% and raising the temperature to 70° C., immersing the treated balsa wood in step 1) for 6 hours and taking it out to remove the hemicellulose component;

[0057] 3) After taking out the balsa wood treated in step 2) and washing it with water, first freeze it at -10°C for 1.5h, then freeze-dry it at -50°C for 8h, put the obtained balsa wood into an aqueous solution of graphene oxide and ascorbic acid ( The mass concentration of graphene oxide is 1%; ...

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Abstract

The invention discloses a high-hydrophobicity wood sponge with electric-thermal conversion capability as well as a preparation method and application thereof. The preparation method of the wood spongecomprises the following steps: firstly, soaking low-density cork wood into a sodium hypochlorite solution and a sodium hydroxide solution in sequence for treatment so as to remove lignin and hemi-cellulose respectively, constructing a longitudinal pore channel structure; freeze-drying the chemically treated cork wood, then putting the freeze-dried cork wood into a water solution of graphene oxideand ascorbic acid, soaking for 10-60 minutes, taking out the soaked cork wood, placing the soaked cork wood at the temperature of 150-200 DEG C for 2-6 hours to enable graphene oxide attached to thesurface of a cork wood skeleton to carry out thermal reduction; finally, putting the treated cork wood into an ethanol solution of fluoro-silane, soaking for 6-24 h, taking out the cork wood, and drying to obtain the high-hydrophobicity wood sponge. The water contact angle of the high-hydrophobicity wood sponge reaches 145 degrees, and the high-hydrophobicity wood sponge has good electricity-heatconversion capacity and can be used for separating high-viscosity crude oil from water.

Description

technical field [0001] The invention relates to a hydrophobic material for oil-water separation, in particular to a highly hydrophobic wood sponge with electrothermal conversion capability and its preparation method and application. Background technique [0002] In recent years, the frequent occurrence of industrial wastewater discharge and marine oil spills not only seriously damaged the ecological environment, but also caused a lot of waste of resources. In order to promote the sustainable development of modern society, how to achieve effective oil-water separation has become one of the current research hotspots. Inspired by the lotus leaf effect in nature, scientific researchers have designed and developed many hydrophobic and superhydrophobic materials, and separated their applications from oil and water, and achieved good results. For example, Wang et al. used organic solvothermal growth technology to prepare a highly hydrophobic composite material based on graphene ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/02B27K3/16B27K3/34B27K5/04B27K5/00
CPCB27K3/02B27K3/16B27K3/34B27K5/0085B27K5/04
Inventor 李红强黄薇张林曾幸荣赖学军
Owner SOUTH CHINA UNIV OF TECH
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