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Magnetic nanofiber aerogel for heavy oil separation

A magnetic nano and nano fiber technology, applied in separation methods, liquid separation, other chemical processes, etc., can solve the problems of affecting the magnetic properties of aerogels, uneven hydrophobic modifiers, and easy falling of magnetic nanoparticles, and achieve magnetic The effect of uniform particle distribution, reduced addition amount, and uniform hydrophobicity

Pending Publication Date: 2022-07-29
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above technical solution, magnetic aerogels are prepared by means of the electrostatic force between magnetic ions and airgel substrates, but the aerogels prepared by the above methods are hydrophilic and are not suitable for the field of oil-water separation
[0004] In the prior art, the Chinese patent application number is 201910975905.3, the publication date is January 24, 2020, and the invention patent titled "a superhydrophobic magnetic mixture and its preparation method and application" discloses a superhydrophobic magnetic mixture and Its preparation method and application, utilize CNF aqueous suspension, Fe 3 o 4 The mixed solution of nanoparticles and hydrophobic modifier directly prepares airgel. The airgel prepared in this way is hydrophobic and magnetic. However, due to the immiscibility between the hydrophobic modifier and the nano-CNF aqueous suspension, Therefore, the hydrophobic modifier inside the final airgel is not uniform, making the hydrophobicity of the airgel uneven; in addition, because there is no chemical bond between the magnetic nanoparticles and CNF, the magnetic nanoparticles are only loaded on CNF, so the magnetic nanoparticles on the airgel are easy to drop during use, which eventually affects the magnetic properties of the airgel

Method used

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  • Magnetic nanofiber aerogel for heavy oil separation
  • Magnetic nanofiber aerogel for heavy oil separation

Examples

Experimental program
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Effect test

Embodiment 1

[0041] S1, 5g ferric oxide and 95g PVA-co-PE nanofibers are melt-blended to obtain magnetic nanofibers, wherein the mass percentage of the addition of magnetic particles and the mass sum of magnetic particles and nanofibers is 5%;

[0042] S2, under the condition of magnetic stirring, configure the magnetic nanofibers prepared in step S1 into a magnetic nanofiber suspension, take 5g of the magnetic nanofiber suspension and mix it with 0.5g of glutaraldehyde to obtain a mixture, and then pour the above mixture into Put it into the mold, then use liquid nitrogen to pre-freeze the mold, and then put the pre-frozen mold into the pre-cooled freeze dryer, and freeze-dry it for 48 hours to obtain PVA-co-PE doped with iron tetroxide. Nanofiber aerogel, wherein, the magnetic nanofiber suspension is obtained by dispersing magnetic nanofibers in water and isopropanol, and the mass ratio of magnetic nanofibers, water and isopropanol is 3:5:5.

[0043] S3. Soak the ferric oxide-doped PVA-c...

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Abstract

The invention provides a magnetic nanofiber aerogel for heavy oil separation, which is prepared by the following steps: firstly carrying out melt blending on magnetic particles and nanofibers, then carrying out crosslinking with a crosslinking agent to obtain the magnetic nanofiber aerogel, and then carrying out surface hydrophobic modification treatment to obtain the super-hydrophobic magnetic nanofiber aerogel. The magnetic particles and the nanofibers are subjected to melt blending, so that the magnetic particles can be uniformly and effectively attached to the nanofibers, and the magnetic particles are ensured to be uniformly distributed in the finally prepared aerogel; a hydrophobic resin solution mixed with hydrophobic particles is used for carrying out surface hydrophobic modification on nanofiber aerogel, the hydrophobic particles can be attached to the surface of the aerogel by means of the viscosity of the hydrophobic resin solution, and meanwhile, the hydrophobic particles can be fixed to the surface of the aerogel along with curing of the hydrophobic resin solution on the surface of the aerogel. Through the mode, the magnetic particles in the prepared super-hydrophobic magnetic nanofiber aerogel are uniformly distributed, and the hydrophobicity is uniform.

Description

technical field [0001] The invention relates to the technical field of oil-water separation materials, in particular to a magnetic nanofiber aerogel for the separation of heavy oil. Background technique [0002] Aerogel is a porous material obtained by using freeze-drying or supercritical carbon dioxide drying technology to process hydrogel and replacing the liquid in the hydrogel with gas, which has the network structure and volume characteristics of the hydrogel itself. The unique properties of aerogels and their modifiable properties make them ideal substrates for functionalized composites. Magnetic nanofiber aerogels are aerogels with magnetic properties. The method of imparting magnetic properties to aerogels usually includes a pretreatment method of directly using a mixture of nanofiber solution and nanomagnetic particles to prepare aerogels, and first preparing aerogels and then modifying nanomagnetic particles on them. In the former method, the aggregation of nano-m...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08J9/40C08J9/42C08J3/24C08L29/04C08L23/08C08K3/22B01J20/26B01J20/30B01J20/28B01D17/022
CPCC08J9/28C08J9/40C08J9/42C08J9/0066C08J3/24B01J20/103B01J20/267B01J20/06B01J20/28009B01J20/28047B01D17/0202C08J2329/04C08J2323/08C08J2483/04C08J2201/0484C08J2205/026Y02A20/204
Inventor 王栋武艺徐桂林刘轲夏明程芹徐佳李青云
Owner WUHAN TEXTILE UNIV
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