Method for preparing hollow carbon balls

A carbon sphere and hollow technology is applied in the field of preparation of hollow carbon spheres, which can solve the problem of high cost and achieve the effects of low cost, simple and easy method and uniform size.

Inactive Publication Date: 2009-12-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the inorganic template method, this method reduces the subsequent template removal process and improves the...

Method used

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  • Method for preparing hollow carbon balls
  • Method for preparing hollow carbon balls
  • Method for preparing hollow carbon balls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) 0.22g sodium lauryl sulfate and 0.1g potassium persulfate are dissolved in 150ml ethanol aqueous solution (the volume ratio of ethanol and deionized water is 5: 2), add 9ml styrene (decompression distillation removes polymerization inhibitor), Stir evenly at high speed under nitrogen flow, polymerize at 70°C for 8 hours, after the polymerization is completed, cool the reaction system to room temperature, and centrifuge to obtain white powder, namely polystyrene microspheres, and dry at 60°C;

[0023] 2) Add 3 g of dried polystyrene microspheres to 30 ml of concentrated sulfuric acid with a mass fraction of 98%, disperse by ultrasonic vibration, and react at 40° C. for 2 hours, and use the obtained sulfonated polystyrene microsphere template with Washed with absolute ethanol, dried;

[0024] 3) Take 0.1 g of the dried sulfonated polystyrene microsphere template, ultrasonically disperse it in 20 ml of absolute ethanol, and under stirring, drop into 20 ml of absolute et...

Embodiment 2

[0027] 1) with embodiment 1 step 1);

[0028] 2) Add 3 g of dried polystyrene microspheres to 30 ml of concentrated sulfuric acid with a mass fraction of 98%, disperse by ultrasonic vibration, and react at 40° C. for 3 hours, wash the obtained product with absolute ethanol, and dry;

[0029] 3) with embodiment 1 step 3);

[0030] 4) Same as step 4) of Example 1.

Embodiment 3

[0032] 1) with embodiment 1 step 1);

[0033] 2) Add 3 g of dried polystyrene microspheres to 30 ml of concentrated sulfuric acid with a mass fraction of 98%, disperse by ultrasonic vibration, and react at 40° C. for 4 hours, wash the obtained product with absolute ethanol, and dry;

[0034] 3) with embodiment 1 step 3);

[0035] 4) Same as step 4) of Example 1.

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Abstract

A method for preparing hollow carbon balls belongs to the field of novel carbon material. The existing preparation method for hollow carbon balls has the problems such as use of strongly corrosive substances, high cost and the like. The invention obtains the product hollow carbon balls by 1) preparing polystyrene micro ball template with uniform diameters; 2) adding the polystyrene micro ball template into concentrated sulphuric acid for sulfonation to obtain polystyrene micro ball template with different sulfonation degrees by controlling sulfonation time; 3) using phenolic resin and sulfonated polystyrene micro ball template to prepare polystyrene/phenolic resin composite balls; and 4) carbonizing the composite balls. The method of the invention is simple, convenient and easy to execute, uses no corrosive substances, has low production cost, can be used as electrode material, energy and hydrogen storage material, lubricant, catalyst carrier and the like.

Description

technical field [0001] The invention belongs to the field of novel carbon materials, and in particular relates to a preparation method of hollow carbon spheres. Background technique [0002] The rapid development of modern science and technology has promoted the rapid advancement of the field of materials. Carbon materials have complex and changeable bonding forms, such as sp, sp2 and sp3 hybridization, which can form a variety of structural forms, showing great application prospects. As an important branch of material science, carbon materials have attracted widespread attention, especially after the discovery of fullerenes and carbon nanotubes. Hollow carbon spheres have excellent chemical and thermal stability, light weight and good compression resistance, so they are widely used in electrode materials, energy storage and hydrogen storage materials, adsorption materials, lubricants and catalyst carriers, etc. Emphasis on both academic and industrial aspects. Template m...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 张学军张智勇
Owner BEIJING UNIV OF CHEM TECH
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