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Composite janus microspheres based oil-water micro-emulsion separation method

A separation method and microemulsion technology, applied in separation methods, liquid separation, microsphere preparation, etc., can solve the problems of limited number of recycling times, difficult oil removal, secondary pollution, etc., and achieve rapid separation and rapid oil-water separation , the effect of efficient separation

Active Publication Date: 2018-07-24
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its super-lipophilic nature, it is difficult to remove the absorbed oil from the oil-absorbing material, thus limiting the number of recycling times; in addition, after the oil-absorbing material is used, it is often discarded or incinerated. easy to cause secondary pollution

Method used

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  • Composite janus microspheres based oil-water micro-emulsion separation method

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Effect test

Embodiment 1

[0039] A method for separating oil-water microemulsion based on composite Janus microspheres, comprising the steps of:

[0040] 1) Disperse crescent-shaped polyacrylic acid-polystyrene-polydivinylbenzene Janus microspheres with a particle size of 2.4 μm in ethanol to obtain a Janus microsphere dispersion with a concentration of 10 mg / mL;

[0041] 2) Disperse the magnetic iron ferric oxide nanoparticles in ethanol to obtain a magnetic nanoparticle dispersion with a concentration of 5 mg / mL;

[0042] 3) Mix and stir 20mL of the Janus microsphere dispersion and 10mL of the magnetic nanoparticle dispersion for 12h to obtain a suspension; place the suspension in a centrifuge for separation to obtain a solid precipitate; use the solid precipitate to Washed twice with absolute ethanol, collected by centrifugation, and then dried in vacuum at 50°C to obtain composite Janus microspheres;

[0043] 4) dispersing the composite Janus microspheres in water to obtain a composite Janus micro...

Embodiment 2

[0048] A method for separating oil-water microemulsion based on composite Janus microspheres, comprising the steps of:

[0049] 1) Disperse crescent-shaped polyacrylic acid-polystyrene-polydivinylbenzene Janus microspheres with a particle size of 1 μm in ethanol to obtain a Janus microsphere dispersion with a concentration of 1 mg / mL;

[0050] 2) Dispersing magnetic cobalt oxide nanoparticles in ethanol to obtain a magnetic nanoparticle dispersion with a concentration of 0.5 mg / mL;

[0051]3) 10 mL of the Janus microsphere dispersion and 5 mL of the magnetic nanoparticle dispersion were mixed and stirred for 10 h to obtain a suspension; the suspension was placed in a centrifuge for separation to obtain a solid precipitate; the solid precipitate was used Washed twice with absolute ethanol, collected by centrifugation, and then dried in vacuum at 40°C to obtain composite Janus microspheres;

[0052] 4) dispersing the composite Janus microspheres in water to obtain a composite J...

Embodiment 3

[0057] A method for separating oil-water microemulsion based on composite Janus microspheres, comprising the steps of:

[0058] 1) Disperse hemispherical polyitaconic acid-polystyrene-polydivinylbenzene Janus microspheres with a particle size of 5 μm in ethanol to obtain a Janus microsphere dispersion with a concentration of 5 mg / mL;

[0059] 2) Disperse the magnetic nickel oxide nanoparticles in ethanol to obtain a magnetic nanoparticle dispersion with a concentration of 5 mg / mL;

[0060] 3) Mix and stir 20mL of the Janus microsphere dispersion and 10mL of the magnetic nanoparticle dispersion for 12h to obtain a suspension; place the suspension in a centrifuge for separation to obtain a solid precipitate; use the solid precipitate to Washed twice with absolute ethanol, collected by centrifugation, and then dried in vacuum at 50°C to obtain composite Janus microspheres;

[0061] 4) dispersing the composite Janus microspheres in water to obtain a composite Janus microsphere di...

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Abstract

The invention discloses a composite janus microspheres based oil-water micro-emulsion separation method. With the polymers Janus microspheres with different structures and different chemical compositions as a base material, the method comprises the following steps: adsorbing magnetic nano particles on the surfaces of the microspheres through electrostatic interaction, to obtain composite Janus microspheres with magnetic responsiveness; mixing and stirring the composite Janus microspheres and an oil-water emulsion; realizing demulsification and layering of the oil-water emulsion; after the layering, applying a magnetic field to realize efficient and quick oil-water separation. According to the method disclosed by the invention, the composite Janus microspheres serve as a particle surfactanton the oil-water interface to realize the demulsification and layering of the oil-water emulsion; by applying the magnetic field, efficient and quick separation of oil and water can be realized. Theoil-water micro-emulsion separation method disclosed by the invention has the advantages of simplicity, quick process and easiness in condition control, and is applicable to efficient separation of oil water formed by different types of large-area oil.

Description

technical field [0001] The invention belongs to the technical field of functional materials; more specifically, it relates to an oil-water microemulsion separation method based on composite Janus microspheres. Background technique [0002] In recent years, with the massive discharge of oily sewage in industry and life, as well as the frequent occurrence of oil spill accidents at sea, oil pollution has become an important problem facing the world. Therefore, the development of efficient and rapid oil-water separation methods has become a key research topic for scientists all over the world. [0003] Traditional oil-water separation methods include: gravity method, centrifugation method, flocculation method, air flotation method, microbial method, etc. However, these traditional methods have problems such as low separation efficiency and high energy consumption. Therefore, researchers are committed to developing more efficient and cheap oil-water separation methods. At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01D17/035C02F1/40C02F1/48C08L33/02C08K3/22C08L35/06
CPCB01D17/0205B01J13/02C02F1/40C02F1/488C02F2305/04C08K3/22C08K2003/2275C08K2003/2289C08K2003/2293C08K2201/01C08K2201/011C08K2201/013C08L33/02C08L35/06
Inventor 王树涛樊俊兵宋永杨江雷
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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