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Preparation method and application of super-hydrophobic MXene-based/cellulose composite aerogel

A composite airgel and superhydrophobic technology, which is applied in the field of preparation of superhydrophobic MXene-based/cellulose composite airgel, can solve the problems of cumbersome preparation methods and uneven material loading, and achieve good repeatability, The effect of uniform and comprehensive surface modification and convenient operation

Active Publication Date: 2022-04-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a universal superhydrophobic and superlipophilic MXene-based / cellulose composite airgel with photothermal properties in order to overcome the defects of cumbersome preparation methods and uneven material loading in the prior art. Preparation method and application

Method used

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  • Preparation method and application of super-hydrophobic MXene-based/cellulose composite aerogel
  • Preparation method and application of super-hydrophobic MXene-based/cellulose composite aerogel

Examples

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Effect test

Embodiment 1

[0051] A method for preparing a superhydrophobic, superlipophilic MXene-based / cellulose composite airgel with photothermal properties, the method comprising the following steps:

[0052] (1) Weigh a certain mass of MAX powder (taking aluminum carbide titanium powder as an example) and dissolve it in a solution of hydrofluoric acid, wherein the mass of aluminum titanium carbide is 1g, and the volume of hydrofluoric acid is 20mL. ≥40%, and then inject nitrogen gas into the system for 30 minutes, and stir at 35°C for 12 hours after sealing with the parafilm, with a rotation speed of 300rpm. After the aluminum carbide titanium powder is etched, centrifuged, washed repeatedly with ultrapure water until the pH of the supernatant is around 6, then washed three times with absolute ethanol, freeze-dried to obtain MXene powder (taking titanium carbide powder as an example) ;

[0053] (2) Weigh a certain mass of titanium carbide powder and disperse it into ultrapure water, wherein the m...

Embodiment 2

[0057] A kind of superhydrophobic with photothermal performance, superlipophilic MXene base / cellulose composite airgel preparation method, the method comprises the following steps:

[0058] (1) Weigh a certain mass of MAX powder (taking aluminum carbide titanium powder as an example) and dissolve it in a solution of hydrofluoric acid, wherein the mass of aluminum titanium carbide is 10g, and the volume of hydrofluoric acid is 100mL. ≥40%, and then inject nitrogen gas into the system for 30 minutes, and stir at 35°C for 12 hours after sealing with the parafilm, with a rotation speed of 300rpm. After the aluminum carbide titanium powder is etched, centrifuged, washed repeatedly with ultrapure water until the pH of the supernatant is around 6, then washed three times with absolute ethanol, freeze-dried to obtain MXene powder (taking titanium carbide powder as an example) ;

[0059] (2) Weigh a certain mass of titanium carbide powder and disperse it into ultrapure water, wherein ...

Embodiment 3

[0063] A kind of superhydrophobic with photothermal performance, superlipophilic MXene base / cellulose composite airgel preparation method, the method comprises the following steps:

[0064] (1) Weigh a certain mass of MAX powder (taking aluminum carbide titanium powder as an example) and dissolve it in a solution of hydrofluoric acid, wherein the mass of aluminum titanium carbide is 1g, and the volume of hydrofluoric acid is 20mL. ≥40%, and then inject nitrogen gas into the system for 30 minutes, and stir at 35°C for 120 hours after sealing with the parafilm, with a rotation speed of 300 rpm. After the aluminum carbide titanium powder is etched, centrifuged, washed repeatedly with ultrapure water until the pH of the supernatant is around 6, then washed three times with absolute ethanol, freeze-dried to obtain MXene powder (taking titanium carbide powder as an example) ;

[0065] (2) Weigh a certain mass of titanium carbide powder and disperse it into ultrapure water, wherein ...

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Abstract

The invention relates to a preparation method of super-hydrophobic MXene-based / cellulose composite aerogel. The preparation method comprises the following steps: (1) preparing or preparing two-dimensional transition metal carbide powder; (2) dispersing the MXene-based / cellulose composite aerogel into ultrapure water, adding a cellulose solution after shaking up, fully stirring and standing, then transferring the solution into a mold for freezing, and performing freeze drying treatment to obtain MXene-based / cellulose composite aerogel; (3) putting the composite aerogel and a container containing a silicon source and ammonia water into a vacuum dryer together, sealing and vacuumizing, then transferring into a constant-temperature box, and storing at constant temperature; and (4) taking out the vacuum dryer, and cooling the vacuum dryer to room temperature to obtain the super-hydrophobic MXene-based / cellulose composite aerogel. The chemical vapor deposition technology is utilized, the technical bottleneck of non-uniform material surface modification is well solved, and meanwhile, the fluidity of sticky oil is also improved through the photothermal effect of MXene. The material has high application potential in the field of oil pollution treatment.

Description

technical field [0001] The invention relates to the technical field of preparation of functional composite airgel, in particular to a preparation method and application of superhydrophobic MXene-based / cellulose composite airgel. Background technique [0002] In recent years, due to the frequent occurrence of incidents such as irregular exploitation of oil fields, rupture of transportation pipelines, accidents of cruise ships at sea, and the wanton discharge of substandard oil-water mixtures, it has had a serious impact on many fields such as society, economy, and environment. The rapid enrichment of viscous oil pollution has become a recognized problem in scientific research and industry. [0003] In view of the poor fluidity and strong hydrophobicity of viscous oil pollution, materials with good photothermal conversion performance have been developed to convert solar energy into heat energy to reduce viscosity and improve the flow performance of viscous oil. At the same ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00B01J20/24B01J20/28B01J20/30B01D17/022
Inventor 姜越梁靖雨彭建程嫣然吴双玉王怡心林思劼
Owner TONGJI UNIV
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