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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  • Summary
  • Abstract
  • Description
  • Claims
  • 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

Method used

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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

Examples

Experimental program
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Example Embodiment

[0017] Specific embodiment 1: This embodiment is a method for preparing magnetic porous carbon balls by a microfluidic method, which is specifically carried out according to the following method:

[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 dispersion 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~ 4): 20; the 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, and use two jet pumps to control the advancing speed of the two syringes. The outlets of the two syringes are connected to a three-way two Two inlets are connected, and the outlet of the tee is connected to the polypropylen...

Example Embodiment

[0021] Specific embodiment two: this embodiment is different from specific embodiment one in that the preparation method of the polystyrene microspheres described in step one is as follows:

[0022] Load the two ports of the three-necked flask with a reflux condenser and a mechanical stirring paddle respectively. Add 500mL of deionized water, 50mL of styrene and 5mL of methacrylic acid to the three-necked flask. The remaining one port is sealed at 300rpm. Stir under the condition of 80℃ and temperature. After the reaction system is refluxed and stabilized, add 0.5g of potassium persulfate, continue to stir at 300rpm and temperature of 80℃ for 2h to obtain the product after centrifugation to obtain a solid , The solid is washed and dried to obtain polystyrene microspheres. Others are the same as the first embodiment.

Example Embodiment

[0023] Specific embodiment three: This embodiment is different from specific embodiment one in that: the polystyrene microspheres described in step one are non-crosslinked polystyrene microspheres with a particle size of 50nm to 500nm. Others are the same as 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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