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Magnetic super-hydrophobic hollow carbon microsphere as well as preparation method and application thereof

A technology of empty carbon microspheres and superhydrophobic, applied in separation methods, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of cumbersome preparation steps, unreported, narrow application range, etc., and achieve The raw materials are cheap and easy to obtain, the operation is simple and controllable, and the effect of efficient adsorption

Active Publication Date: 2021-02-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method is easy to prepare and low in cost, but the iron-containing manganese dioxide has combustion-supporting properties and acute toxicity
[0006] Although there have been researches on the preparation process of magnetic hydrophobic particles, the existing process methods generally require special equipment, and there are problems such as cumbersome preparation steps and narrow application range.
In addition, oily sewage contains micro-nano emulsions stabilized by various emulsifiers, which increases the difficulty of oil-water separation and reduces the efficiency of oil-water separation
However, there is no report on the preparation of magnetic hydrophobic particles that can adsorb oil spills and separate emulsifier-stabilized oil-in-water or water-in-oil micro / nanoemulsions in a timely, rapid, efficient and cyclic manner.

Method used

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  • Magnetic super-hydrophobic hollow carbon microsphere as well as preparation method and application thereof
  • Magnetic super-hydrophobic hollow carbon microsphere as well as preparation method and application thereof
  • Magnetic super-hydrophobic hollow carbon microsphere as well as preparation method and application thereof

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preparation example Construction

[0035] A preparation method of magnetic super-repellent hollow carbon microspheres, comprising the following steps:

[0036] Step 1: preparing magnetic nanoparticles;

[0037] Step 2: preparing magnetic hollow microspheres by using the magnetic nanoparticles obtained in step 1;

[0038] Step 3: The magnetic hollow microspheres in step 2 are carbonized to obtain the desired magnetic super-repellent hollow carbon microspheres.

[0039] The carbonization process in step 3 is as follows: under atmosphere protection conditions, carbonize at 100-200°C for 15-60 minutes, then at 300-400°C for 15-60 minutes, and finally at 600-1000°C for 1-60 minutes. 4h.

[0040] Step 2 prepares magnetic hollow microspheres by in-situ polymerization or interfacial polymerization.

[0041]When using in-situ polymerization to prepare magnetic hollow microspheres, the wall material is urea-formaldehyde resin, melamine resin, melamine-modified urea-formaldehyde resin, polyvinyl alcohol-modified urea-f...

Embodiment 1

[0063] A preparation method and application of magnetic super-repellent hollow carbon microspheres are as follows:

[0064] Step 1: preparing magnetic nanoparticles;

[0065] Weigh 4.05g ferric chloride hexahydrate, dissolve it in 100mL deionized water, and pass nitrogen; when the temperature of the system rises to 90°C, add 2.7g ferrous sulfate heptahydrate to the above solution, stir and mix evenly; adjust the speed to 600rpm , add 15mL ammonia water (mass percentage concentration is 25-28wt%), react for 5min. Next, 0.67 g of oleic acid was added, and the reaction was continued for 55 minutes before stopping the reaction; the reaction was cooled to room temperature, washed with ethanol and deionized water, and then dried in a vacuum environment at 60° C. to obtain a black powder.

[0066] Step 2: preparing magnetic hollow microspheres by using the magnetic nanoparticles obtained in step 1;

[0067] Weighing 6.33g of formaldehyde solution with a mass concentration of 37wt% ...

Embodiment 2

[0079] A preparation method and application of magnetic super-repellent hollow carbon microspheres are as follows:

[0080] Step 1: preparing magnetic nanoparticles;

[0081] Weigh 4.05g ferric chloride hexahydrate, dissolve it in 100mL deionized water, and pass nitrogen; when the temperature of the system rises to 90°C, add 2.7g ferrous sulfate heptahydrate to the above solution, stir and mix evenly; adjust the speed to 600rpm , add 15mL ammonia water (mass percentage concentration is 25-28wt%), react for 5min. Next, 0.67 g of oleic acid was added, and the reaction was continued for 55 minutes before stopping the reaction; the reaction was cooled to room temperature, washed with ethanol and deionized water, and then dried in a vacuum environment at 60° C. to obtain a black powder.

[0082] Step 2: preparing magnetic hollow microspheres by using the magnetic nanoparticles obtained in step 1;

[0083] Weighing 6.33g of formaldehyde solution with a mass concentration of 37wt% ...

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Abstract

The invention discloses a magnetic super-hydrophobic hollow carbon microsphere as well as a preparation method and application thereof. The magnetic super-hydrophobic hollow carbon microsphere comprises a super-hydrophobic carbon shell layer with a hollow structure and magnetic nanoparticles coated in the super-hydrophobic carbon shell layer, the super-hydrophobic carbon shell layer is of a porousstructure, and the surface of the super-hydrophobic carbon shell layer is provided with multistage micro-nano surface protrusions. The content of the magnetic nanoparticles is 2-50wt%, and the content of the super-hydrophobic carbon shell layer is 50-98wt%. The magnetic nanoparticles are coated in the hollow carbon shell layer, so that the magnetic nanoparticles can be prevented from being in direct contact with the external environment, and the magnetic nanoparticles are prevented from reacting with acid, alkali and the like; and the magnetic super-hydrophobic hollow carbon microspheres areresistant to acid and alkali, high in salinity and stable in super-hydrophobicity and super-lipophilicity, the static water contact angle of the magnetic super-hydrophobic hollow carbon microspheres is larger than 150 degrees, and the oil contact angle of the magnetic super-hydrophobic hollow carbon microspheres is about 0 degree. The magnetic super-hydrophobic hollow carbon microsphere can be applied to the fields of oil-water separation and adsorption, self-cleaning antifouling, anti-icing, photo-thermal conversion and sea water desalination.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a magnetic super-repellent hollow carbon microsphere, a preparation method and an application. Background technique [0002] In recent years, the continuous discharge of oily sewage and the frequent occurrence of oil spill accidents have led to increasingly serious oil and water pollution problems, which not only cause catastrophic damage to the ecological environment, but also cause serious harm to human health. Therefore, the development of oil-water separation technology has important practical significance and application value. Conventional oil-water separation technologies include gravity drive method, biodegradation method, chemical treatment method, etc. However, these technologies often have limitations such as complicated process, high cost and low separation efficiency, which limit their development and application. At present, different from the...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D17/022
CPCB01J20/20B01J20/06B01J20/28009B01J20/28021B01J20/28011B01D17/0202
Inventor 王玉忠杨娜吴刚罗紫璇陈慧君
Owner SICHUAN UNIV
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