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Method for preparing amphipathic nature block polymer decorated nanometer-carbon tube

An amphiphilic block, carbon nanotube technology, applied in the field of materials, can solve problems such as affecting the performance of carbon nanotubes, destroying carbon nanotubes, etc., achieving good application value and avoiding complex steps.

Inactive Publication Date: 2008-03-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the strong oxidation process of the acidification treatment will destroy the structure of the carbon nanotubes and cut off the carbon nanotubes, which will affect the performance of the carbon nanotubes themselves; [4] , Carbene [5] , anionic polymerization [6] ,Radical Polymerization [7] , electrochemical reduction [8] , electron transfer method [9] and so on to realize the chemical modification of the surface of carbon nanotubes

Method used

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  • Method for preparing amphipathic nature block polymer decorated nanometer-carbon tube

Examples

Experimental program
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Effect test

Embodiment 1

[0050] MWNT-g-polyethylene glycol monomethyl ether 750 (PEG 750 ,M n =750)-b-polystyrene (PS, M n =3400) preparation

[0051] a) Preparation of vinyl functionalized multi-walled carbon nanotubes

[0052] With 100mg hydroxylated multi-walled carbon nanotubes (produced by Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences, pipe diameter less than 8nm, purity ≥ 95%, directly used), 30ml acetone, 30ml chloroform and 0.5g inhibitor hydroquinone Add it into a 250ml three-neck flask, ultrasonically oscillate for 1 hour, add 5ml of acryloyl chloride, then place the flask in a 40°C constant temperature water bath, magnetically stir, condense and reflux for 24 hours, then add 25ml of absolute ethanol, and react for 3 hours. After the reaction, add 200ml Dilute the reaction solution with anhydrous ethanol, oscillate ultrasonically for 5 minutes, filter it with a polyvinylidene fluoride membrane with a pore size of 0.22 μm, and wash it repeatedly with anhydrous ethanol, a...

Embodiment 2

[0060] MWNT-g-polyethylene glycol monomethyl ether 750 (PEG 750 ,M n =750)-b-polymethyl methacrylate (PMMA, M n =4500) preparation

[0061] a) Preparation of vinyl functionalized multi-walled carbon nanotubes

[0062] With 100mg hydroxylated multi-walled carbon nanotubes (produced by Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences, diameter less than 8nm, purity ≥ 95%, directly used), 1g acrylic acid, 0.12g p-toluenesulfonic acid, 0.5g p-benzoquinone and 50ml Add cyclohexanone to a 250ml three-neck flask, ultrasonically oscillate at 20°C for 2h, then place the flask in a constant temperature oil bath at 100°C, magnetically stir, condense and reflux for 18h, after the reaction is complete, add 200ml of absolute ethanol to dilute the reaction solution , after ultrasonic oscillation for 5 minutes, filter with a polyvinylidene fluoride membrane with a pore size of 0.45 μm, and wash repeatedly with absolute ethanol and deionized water, and dry the finally obtain...

Embodiment 3

[0070] SWNT-g-polyethylene glycol monomethyl ether 750 (PEG 750 ,M n =750)-b-poly tert-butyl methacrylate (PtBMA, Mn =4600) preparation

[0071] a) Preparation of vinyl-functionalized single-walled carbon nanotubes

[0072] 100mg of hydroxylated single-walled carbon nanotubes (produced by Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences, diameter 0.8 ~ 1.6nm, purity ≥ 90%, used directly), 3g maleic anhydride, 0.12g p-toluenesulfonic acid, 0.5 Add g hydroquinone and 60ml cyclohexanone into a 250ml three-neck flask, ultrasonically oscillate at 25°C for 3h, then place the flask in a constant temperature oil bath at 110°C, magnetic stirring, condensing and reflux for 12h, after the reaction, add Dilute the reaction solution with 300ml of absolute ethanol, oscillate ultrasonically for 5 minutes, filter it with a polyvinylidene fluoride membrane with a pore size of 0.3 μm, and wash it repeatedly with absolute ethanol and deionized water, and dry the finally obtaine...

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Abstract

The present invention belongs to the material technology field, in particular relates to a preparation method of carbon nano tube decorated by amphiphilic block copolymer. The detail steps are that the double bonds are led into the surface of the carbon nano tube by making use of a hydroxylation carbon nano tube and any of acyl chloride, anhydride or amide with double bonds; a water-soluble polymer macromolecular initiator, the end group of which is provided with atom transfer radical polymerization initiating groups is composed by making use of signal hydroxyl terminated water-soluble polyether and alpha-halogenated acyl halide and then a hydrophobic monomer is initiated to carry through ATRP reaction. One end of the amphiphilic block copolymer acquired is a halogen atom; reactions are carried through on the amphiphilic block copolymer the end group of which is the halogen atom and the nano tube with double bonds on the surface thereby grafting the polymer on the surface of the carbon nano tube. The invention makes use of an atom transfer addition method to carry through polymer graft on the carbon nano tube and avoids the damage to the carbon nano tube wall and carbon nano tube cutting caused by acid treatment thereby being able to acquire a water-soluble full carbon nanon tube.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of carbon nanotubes modified by amphiphilic block copolymers. Background technique [0002] Carbon nanotubes have excellent physical, chemical and mechanical properties, and they have great potential application value in many aspects. The preparation of carbon nanotube / polymer composite materials can improve the mechanical properties of polymers, prepare photoelectric functional materials, lubricating additives, etc. At present, polymer / carbon nanotube composites have become the main research and application direction of carbon nanotubes. However, carbon nanotubes with a micron-scale length are insoluble in water and organic solvents, and are usually mixed with a polymer solution to form a suspoemulsion state. In the final composite material, there is an undesirable aggregation state, and the intertwined carbon nanotube coils are not formed. C...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82B3/00
Inventor 王国建王可伟邱军
Owner TONGJI UNIV
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