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Carbon or carbon composite hollow ball and preparation thereof

A carbon composite, hollow sphere technology, applied in the field of hollow sphere materials, can solve the problem of not mentioning further preparation of carbon or carbon composite hollow spheres, etc., and achieve the effect of simple process

Inactive Publication Date: 2008-12-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN1772363A discloses the method for preparing hollow spheres and composite hollow spheres by template method, this method only relates to the polymer hollow sphere template of double-shell structure, and the above documents do not mention the method for further preparing carbon or carbon composite hollow spheres

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Example 1 Preparation of cross-linked polystyrene hollow sphere-1

[0095] Linear polystyrene hollow spheres (Rohm and Haas, ROPAQUE TM ULTRAE), the outer diameter is 380nm, and the thickness of the shell is 80nm. 5g of linear polystyrene emulsion (20wt%) was dispersed under stirring (speed: 100rpm) in a mixture containing emulsifier: sodium lauryl sulfate (amount of 0.01wt% of linear polystyrene hollow spheres) and stabilizer: polystyrene Vinyl alcohol (the amount used is 50 wt% of the linear polystyrene hollow sphere) in 50 g of aqueous solution. Then monomer: styrene (consumption is 20wt% of linear polystyrene hollow sphere), crosslinking agent: divinylbenzene (consumption is 50wt% of linear polystyrene hollow sphere), initiator: benzyl peroxide Acyl (the amount used is 10wt% of the linear polystyrene hollow sphere) was added to the above system. Swell at 60°C for 24 hours. Raise the temperature to 80°C and react for 24 hours. Centrifugal separation to obtain c...

Embodiment 2

[0097] Example 2 Preparation of cross-linked polystyrene hollow sphere-2

[0098] Linear polystyrene hollow spheres (Rohm and Haas, OP301) have an outer diameter of 170 nm and a shell thickness of 35 nm. 5g of linear polystyrene emulsion (30wt%) is dispersed under stirring (speed: 500rpm) in containing emulsifier: sodium lauryl sulfate (consumption is 20wt% of linear polystyrene hollow sphere) and stabilizer: polyethylene Alcohol (amount is 30wt% of the linear polystyrene hollow sphere) in 50g aqueous solution. Then monomer: styrene (consumption is 30wt% of linear polystyrene hollow sphere), crosslinking agent: divinylbenzene (consumption is 30wt% of linear polystyrene hollow sphere), initiator: azobisiso Butyronitrile (the amount used is 10 wt% of the linear polystyrene hollow sphere) was added to the above system. Swell at 40°C for 4 hours. Raise the temperature to 65°C and react for 6 hours. Centrifugal separation to obtain cross-linked polystyrene hollow spheres.

[0...

Embodiment 3

[0101] Example 3 Preparation of cross-linked polystyrene hollow sphere-3

[0102] Linear polystyrene hollow spheres (Rohm and Haas, OP303B) have an outer diameter of 250 nm and a shell thickness of 60 nm. 5g of linear polystyrene emulsion (40wt%) is dispersed under stirring (speed: 300rpm) in containing emulsifier: sodium lauryl sulfate (consumption is 10wt% of linear polystyrene hollow sphere) and stabilizer: polyethylene Alcohol (amount is 20wt% of the linear polystyrene hollow sphere) in 50g aqueous solution. Then monomer: styrene (consumption is 20wt% of linear polystyrene hollow sphere), crosslinking agent: divinylbenzene (consumption is 50wt% of linear polystyrene hollow sphere), initiator: azobisiso Butyronitrile (the amount used is 10 wt% of the linear polystyrene hollow sphere) was added to the above system. Swell at 30°C for 12 hours. Raise the temperature to 75°C and react for 18 hours. Centrifugal separation to obtain cross-linked polystyrene hollow spheres.

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Abstract

The invention belongs to the hollow sphere material field, in particular to a carbon hollow sphere or a carbon composite hollow sphere, and a preparing method thereof; the invention adopts gel crosslinking polystyrene hollow sphere as a template to prepare the carbon hollow sphere or the carbon composite hollow sphere; as the template with crosslinking structure is adopted, the shape of sphere can be kept to be complete; besides, the method has simple technique, and can carry out capacity production. The carbon hollow sphere or the carbon composite hollow sphere of the invention consists of carbon and a composite or consists of the composite containing the carbon completely; wherein, the carbon accounts for 6.12 to 100 percent and the carbon crystal type is amorphous type or graphite type. The carbon hollow sphere or the carbon composite hollow sphere of the invention not only has good dispersity, but also has good intensity and size stability; the size of the carbon hollow sphere or the carbon composite hollow sphere can be adjusted in the range of 10nm to 8Mum and the composition and the thickness of the shell can be controlled.

Description

technical field [0001] The invention belongs to the field of hollow sphere materials, and in particular relates to carbon hollow spheres or carbon composite hollow spheres and a preparation method thereof. Background technique [0002] Hollow sphere material is a functional material with a special structure, which has great application prospects in the fields of catalysis, drug delivery, artificial cells, lightweight fillers, insulating materials, low dielectric materials, and photonic crystals. Among the above-mentioned hollow spheres, carbon hollow spheres are known as catalyst supports (G.S.Chai, S.B.Yoon, J.H.Kim, J.S.Yu, "Spherical carbon capsules with hollow macroporous core and mesoporous shell structures as a highly efficient catalyst support in the direct methanol fuel cell" , Chem.Commun.2004; 2766.), lithium ion secondary battery anode material (K.T.Lee, Y.S.Jung, S.M.Oh, "Synthesis of tin-encapsulated spherical hollow carbon for anodematerial in lithium secondary...

Claims

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Application Information

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IPC IPC(8): C01B31/00
Inventor 杨振忠丁书江
Owner INST OF CHEM CHINESE ACAD OF SCI
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