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Method for preparing biocompatible cellulose functionalized carbon nano tube

A technology of biocompatibility and carbon nanotubes, which is applied in the field of nanotechnology preparation, can solve the problems of occupation of hydroxyl active sites, increase of reaction steps, increase of use cost, etc., and achieve good biocompatibility and strong controllability , good water solubility effect

Inactive Publication Date: 2008-05-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] After searching the literature of the prior art, it was found that "Formylated cellulose is used to disperse and purify single-walled carbon nanotubes" published in "Japan Applied Physics" 2004, Vol. The disadvantage of using formylated modified cellulose to modify and disperse carbon nanotubes in water is that the formylated modified cellulose leads to the occupation of its hydroxyl active sites, and the increase in reaction steps increases the cost of use.

Method used

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  • Method for preparing biocompatible cellulose functionalized carbon nano tube

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Embodiment 1

[0028] Using single-walled carbon nanotubes prepared by chemical vapor deposition as the initial raw material, in the ionic liquid reaction phase, cellulose molecules are functionalized onto the surface of single-walled carbon nanotubes through non-covalent physical coating to obtain biocompatibility cellulose-functionalized carbon nanotubes.

[0029] Step a: Add 0.60 mol of methylimidazole to a single-necked round-bottomed flask equipped with a magnetic stirring rotor, seal it with an inversion rubber stopper, then repeatedly pump argon gas three times, and inject it with a syringe under magnetic stirring at room temperature. Add 0.65mol butyl bromide to the flask in 5 batches, then bring the oil bath to 50°C, continue magnetic stirring for 12h, add the product into 200mL ethyl acetate, shake, wash, and separate liquids, repeat 5 times, and statically dissolve in 200mL of acetonitrile Place, recrystallize, and obtain ionic liquid 1-butyl-3-methylimidazole bromide ([BMIM]Br) a...

Embodiment 2

[0035]Using single-walled carbon nanotubes prepared by catalytic pyrolysis as the initial raw material, in the ionic liquid reaction phase, the cellulose molecules are functionalized onto the surface of single-walled carbon nanotubes through non-covalent physical coating to obtain biocompatibility cellulose-functionalized carbon nanotubes.

[0036] Step a: Add 0.90 mol of methylimidazole to a single-necked round-bottomed flask equipped with a magnetic stirring rotor, seal it with a rubber stopper, pump and fill it with argon gas repeatedly for 3 times, and inject it with a syringe under magnetic stirring at room temperature. Add 1.20mol chlorobutane to the flask in 10 batches, then bring the oil bath to 70°C, continue magnetic stirring for 18h, add the product into 200mL ethyl acetate, shake, wash, and separate liquids, repeat 5 times, and statically dissolve in 200mL of acetonitrile Place, recrystallize, obtain ionic liquid chloride 1-butyl-3-methylimidazole ([BMIM]Cl) after ...

Embodiment 3

[0040] Using single-walled carbon nanotubes prepared by catalytic pyrolysis as the initial raw material, in the ionic liquid reaction phase, the cellulose molecules are functionalized onto the surface of single-walled carbon nanotubes through non-covalent physical coating to obtain biocompatibility cellulose-functionalized carbon nanotubes.

[0041] Step a: Add 0.5 mol of methylimidazole to a single-necked round-bottomed flask equipped with a magnetic stirring rotor, seal it with an inversion rubber stopper, then repeatedly pump argon gas three times, and inject it with a syringe under magnetic stirring at room temperature. Add 0.75mol chlorohexane in 2 batches to the flask, then bring the oil bath to 75°C, continue magnetic stirring for 20h, add the product into 200mL ethyl acetate, shake, wash, and separate liquids, repeat 5 times, and statically dissolve in 200mL of acetonitrile Place, recrystallize, and obtain ionic liquid chloride 1-hexyl-3-methylimidazole ([HMIM]Cl) afte...

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Abstract

The invention relates to a biocompatible cellulose functionalized carbon nanotube and a preparation method thereof in the technical field of chemical industry. Purified carbon nanotubes are ultrasonically dispersed in ionic liquids; then the ionic liquid solution of cellulose is added to functionalize the cellulose molecules on the surface of carbon nanotubes through non-covalent physical interactions to obtain biocompatible cellulose and carbon nanotube composites. The preparation method is simple and easy to control, and the obtained product can be stably dispersed in water for a long time, and exhibits good biocompatibility, can be used as a substrate for cell culture, and has a wide range of applications in the biological field.

Description

technical field [0001] The invention relates to a preparation method in the field of nanotechnology, in particular to a preparation method of biocompatible cellulose functionalized carbon nanotubes. Background technique [0002] Carbon nanotube (CNT for short) is a new type of carbon structure discovered in recent years. It is a seamless hollow carbon tube formed by curling graphene sheets formed by carbon atoms. It is a one-dimensional quantum material with a highly delocalized π-electron conjugated system. Carbon nanotubes are classified into single-walled carbon nanotubes (SWNTs) and multi-walled carbon nanotubes (MWNTs). The walls of carbon nanotubes are smooth and highly polarizable, and they are easy to agglomerate into bundles under the action of strong van der Waals force. They are almost insoluble in water and various organic solvents, and difficult to disperse. Their applications in many fields are greatly limited. Therefore, the functional modification of carbon...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82B3/00C09C1/44C09C3/10
Inventor 伏传龙孟令杰张晓科路庆华
Owner SHANGHAI JIAO TONG UNIV
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