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Preparation of polymer based carbon balls

A polymer and carbon sphere technology, applied in the field of polymer-based carbon sphere preparation, can solve problems such as difficult large-scale preparation, high material cost, and many surface defects, and achieve easy large-scale preparation, uniform and controllable particle size, and surface smooth effect

Inactive Publication Date: 2006-10-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Obviously, these methods generally have complex processes (requires arc discharge, plasma initiation or high temperature and high pressure reaction conditions), low yield (there are a considerable number of by-products such as carbon nanotubes, nano-onions, fullerenes, etc.) , uneven particle size, poor sphericity (many surface defects, not smooth), impurities in the material, high material cost, and difficulty in large-scale preparation, etc.

Method used

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  • Preparation of polymer based carbon balls
  • Preparation of polymer based carbon balls
  • Preparation of polymer based carbon balls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take by weighing 10 grams of polyvinyl chloride (PVC) paste resin (commercially available, the model is P450, the degree of polymerization is: 1000 ± 150, the particle diameter is 300nm and 1.2 μ m bimodal distribution, scanning electron microscope photo sees figure 1 ) and 10 grams of KOH (analytically pure, molecular weight 56.10) were put into a three-necked flask, and then 100 grams of deionized water was added. The mass ratio of polyvinyl chloride paste resin, KOH and deionized water is 1:1:10. The three-neck flask was placed in a water bath and reacted at a constant temperature of 95° C. for 3 days under constant stirring. Then the reactants were taken out, washed with deionized water until neutral and dried at 100°C, and then placed in a blast oven at 240°C for air oxidation treatment for 1 hour. Put the treated polyvinyl chloride paste resin into a carbonization furnace to raise the temperature to 1000°C at a rate of 2°C / min., and stay at this temperature for o...

Embodiment 2

[0029] The operation method is the same as in Example 1, except that the temperature of the air oxidation treatment is 180° C., and the time is 3 hours. The morphology and particle size of the carbonized polymer-based carbon spheres are the same as in Example 1.

Embodiment 3

[0031] The operation method is the same as in Example 1, except that the mass ratio of polyvinyl chloride paste resin, KOH and deionized water is 1:17:10; the three-necked flask is placed in an electric heating mantle for heating; the temperature of the alkali treatment The temperature is 130°C; the alkali treatment time is 12 hours. After carbonization at 1000°C, the carbonized polymer-based carbon spheres are spherical black carbon powders, and then graphitized at 2500°C to obtain graphitized polymer-based carbon spheres. The final product still maintains a solid spherical shape, and XRD tests show that its The degree of crystallization is improved.

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Abstract

The invention relates to a preparation method of polymer-based carbon spheres, which uses halogen-containing polymer microsphere resins of 100nm to 100 μm as raw materials, undergoes alkali treatment, oxidation treatment, and then carbonization and graphitization to obtain a particle size range of Polymer-based carbon microspheres of 100nm to 100μm; for polymer microsphere resin materials containing halogen elements less than 100nm, after alkali treatment and then carbonization and graphitization to obtain polymer-based carbon microspheres with a particle size of less than 100nm . Alkali treatment is to stir the polymer microspheres with alkali and solvent at 60-280°C for 6-72 hours, then wash and dry to obtain the precursor; the oxidation temperature of air oxidation treatment is 180-240°C, and the oxidation time is 1-3 Hour. The method of the invention has the characteristics of simple process, low preparation cost, high product purity, wide selection range of raw materials, etc., and is easy to realize large-scale preparation.

Description

technical field [0001] The invention relates to a new method for preparing polymer-based carbon spheres. The polymer spherical resin is used as a raw material, and is prepared by carbonization or graphitization after alkali treatment and oxidation treatment. Background technique [0002] Since the 1990s, the discovery of advanced carbon materials represented by fullerenes and carbon nanotubes has triggered an upsurge in research on carbon materials worldwide. Many carbon materials with different shapes, novel structures and unique properties, such as carbon nanocones, nano onions, carbon micro trees and sucrose carbon spheres, have been successively researched and developed, and have broad application prospects in the fields of electronics, energy, medicine, materials, etc. . [0003] The emergence of spherical carbon materials has aroused great interest in the chemical, material science and business circles, and is considered to be a new type of special material with broad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02C04B35/524
Inventor 宋怀河王景坤陈晓红
Owner BEIJING UNIV OF CHEM TECH