Method for preparing magnetic porous carbon spheres through microfluidic method

A porous carbon and microfluidic technology, which is applied in the preparation/purification of carbon, the oxide of ferrous iron, the manufacture of inductors/transformers/magnets, etc. Uniformity, harsh preparation conditions, etc., to achieve the effect of novel and unique method, easy post-processing, and uniform particle size

Inactive Publication Date: 2017-07-07
HEILONGJIANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the current preparation method of porous carbon spheres is complex in operation, harsh in preparation conditions, and the prepared carbon spheres are not uniform in particle size, small in particle size, poor in dispersibility, do not have the ability of recycling and are not round in shape technical problems, and provide a microfluidic method for preparing magnetic porous carbon spheres

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  • Method for preparing magnetic porous carbon spheres through microfluidic method
  • Method for preparing magnetic porous carbon spheres through microfluidic method
  • Method for preparing magnetic porous carbon spheres through microfluidic method

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specific Embodiment approach 1

[0017] Embodiment 1: This embodiment is a method for preparing magnetic porous carbon spheres by a microfluidic method, specifically as follows:

[0018] 1. Prepare the dispersed phase: dissolve polyvinylpyrrolidone in water, then add polystyrene microspheres and Fe 3 o 4 The magnetic particles are uniformly stirred into a dispersed solution to obtain a dispersed phase; the mass ratio of the polyvinylpyrrolidone to water is (1~15):100; the mass ratio of the polystyrene microspheres to water is (1~15): 4): 20; said Fe 3 o 4 The mass ratio of magnetic particles to water is (1~5):100;

[0019] 2. Preparation of microbeads: Put the mobile phase and the dispersed phase prepared in step 1 into two syringes respectively, use two jet pumps to control the propulsion speed of the two syringes, and the outlets of the two syringes are respectively connected to the two outlets of a three-way The two inlets are connected, the outlet of the three-way is connected to the polypropylene rec...

specific Embodiment approach 2

[0021] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the preparation method of the polystyrene microsphere described in step one is as follows:

[0022] Two ports in the three-necked flask were respectively equipped with a reflux condenser and a mechanical stirring paddle, and 500 mL of deionized water, 50 mL of styrene, and 5 mL of methacrylic acid were added to the three-necked flask, and the remaining one port was sealed, and the rotating speed was 300 rpm. Stir at a temperature of 80°C. After the reaction system refluxes and stabilizes, add 0.5 g of potassium persulfate and continue to stir for 2 hours at a speed of 300 rpm and a temperature of 80°C. The product is centrifuged to obtain a solid , the solid was washed and dried to obtain polystyrene microspheres. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the polystyrene microspheres described in step 1 are non-crosslinked polystyrene microspheres with a particle size of 50 nm to 500 nm. Others are the same as in the first embodiment.

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Abstract

The invention relates to a method for preparing magnetic porous carbon spheres through a microfluidic method and aims at solving the technical problems that an existing preparation method of porous carbon spheres is complicated in operation and strict in preparation condition, and that the prepared porous carbon spheres are uneven in particle sizes, relatively small in particle size and poor in dispersity, are not recyclable, and are not round in shape. The method comprises the steps of (1) preparing a disperse phase; (2) preparing microspheres; and (3) carrying out carbonization treatment. The microspheres prepared through the method are controllable in size, uniform in particle size and consistent in shape and form; and micropores prepared by employing polystyrene microspheres as a template are consistent in aperture and are in a honeycomb form. The method is novel and unique, simple in operation and small and easy in post-processing, the process is safe and non-toxic, and the method is environmentally friendly.

Description

technical field [0001] The invention relates to a method for preparing magnetic porous carbon spheres by a microfluidic method. Background technique [0002] Water pollution is one of the most urgent problems for human beings. Every year, more than 420 billion cubic meters of sewage are discharged into rivers, lakes and seas, polluting 5.5 trillion cubic meters of fresh water. Among them, the water-insoluble oily organic solvents are highly toxic, and the pollution is not easy to degrade naturally. How to clean them is one of the key points of scientific research in environmental science. The key to solving this problem is how to enrich and decompose these oily organic solvents. The most commonly used method for enriching oily organic solvents in water is through activated carbon adsorption, but it is not easy to recycle the oily organic solvents after activated carbon is adsorbed, and activated carbon cannot be reused, resulting in waste. [0003] To solve this problem, t...

Claims

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Application Information

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IPC IPC(8): C01G49/08C01B32/05H01F41/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G49/08C01P2004/03C01P2004/62C01P2004/64C01P2004/80H01F41/0253
Inventor 张艳红窦天威邹金龙王淑红汪成
Owner HEILONGJIANG UNIV
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