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Method for preparing material of Nano carbon tube grafted by azobenzene in light responsibility

A technology of carbon nanotubes and photoresponsiveness, which is applied in the preparation of photoresponsive azobenzene grafted carbon nanotube materials, electrical and energy conversion materials, and optical fields, and can solve the problems that do not involve photoresponsive azobenzene organic materials. Molecularly grafted carbon nanotube material preparation, light control and its optical and electrical properties, etc., to achieve the effects of adjustable optical and electrical properties, high electrical conductivity, and good film-forming properties

Inactive Publication Date: 2005-10-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are no reports or patents related to the preparation of photoresponsive azobenzene organic molecule grafted carbon nanotube materials, photocontrol and its photoelectric and electrical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1) Acidification of CNTs: Add 6.0g of multi-walled CNTs to 200mL of nitric acid and sulfuric acid in a 3:1 mixed acid to prepare a 0.03g / mL solution, heat it to boiling state and reflux for 70min, filter and wash until weak Acidic, vacuum dried for 48h.

[0014] 2) Preparation of acyl chloride CNTs: Disperse 4.8 g of acidified CNTs obtained in step 1) in SOCl 2 Prepare a 0.01g / mL solution in 70°C for 48 hours, centrifuge and pour off the SOCl 2 , and then poured into anhydrous 200mLTHF for ultrasonic vibration, then centrifuged, washed repeatedly three times, and the product was dried in a vacuum desiccator to obtain carbon nanotubes CNT-(COCl)n with acid chloride functional groups.

[0015] 3) Preparation of 4,4'hexamethylenediamine-p-amide azobenzene: Dissolve 10.0g of p-nitrobenzoic acid and zinc powder in 150mL of 30% sodium hydroxide, add 1.25g of zinc powder and mix, and reflux at 80°C After reacting for 24 hours, the mixture was diluted with 200 mL of water, an...

Embodiment 2

[0018] 1) Acidification of CNTs: Add multi-walled CNTs to a 3:1 mixed acid of nitric acid and sulfuric acid to prepare a 0.03g / mL solution, heat it to boiling state and reflux for 70min, filter, wash to weak acidity, and vacuum dry 48h.

[0019] 2) Preparation of acid chlorinated CNTs: disperse the acidified CNTs obtained in step 1) in SOCl 2 Prepare a 0.01g / mL solution in 70°C for 48 hours, centrifuge and pour off the SOCl 2 , and then poured into anhydrous 200mLTHF for ultrasonic vibration, then centrifuged, washed repeatedly three times, and the product was dried in a vacuum desiccator to obtain carbon nanotubes CNT-(COCl)n with acid chloride functional groups.

[0020] 3) Preparation of 4,4'octyldiamine-p-amide azobenzene: Dissolve 10.0g of p-nitrobenzoic acid and zinc powder in 150mL of 30% sodium hydroxide, add 1.25g of zinc powder and mix, and reflux at 80°C After reacting for 24 hours, the mixture was diluted with 200 mL of water, and 3.0 g of zinc powder was added f...

Embodiment 3

[0023] 1) Acidification of CNTs: Add single-walled CNTs to a 3:1 mixed acid of nitric acid and sulfuric acid to prepare a 0.03g / mL solution, heat it to boiling state and reflux for 70min, filter, wash to weak acidity, and vacuum dry 48h.

[0024] 2) Preparation of acid chlorinated CNTs: disperse the acidified CNTs obtained in step 1) in SOCl 2 Prepare a 0.01g / mL solution in 70°C for 48 hours, centrifuge and pour off the SOCl 2, and then poured into 200 mL of anhydrous THF for ultrasonic vibration, centrifuged again, washed repeatedly three times, and the product was dried in a vacuum desiccator to obtain carbon nanotubes CNT-(COCl)n with acid chloride functional groups.

[0025] 3) Preparation of 4,4'hexamethylenediamine-p-amide azobenzene: Dissolve 10.0g of p-nitrobenzoic acid and zinc powder in 150mL of 30% sodium hydroxide, add 1.25g of zinc powder and mix, and reflux at 80°C After reacting for 24 hours, the mixture was diluted with 200 mL of water, and 3.0 g of zinc powd...

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Abstract

The present invention discloses a preparation method of photoresponsibility azobenzene graft carbon nano tube material, belonging to preparation technology of optical, electric and energy-transducing material. Said preparation process includes the following steps: adding multiwall or single-wall carbon nano tube into mixed acid formed from nitric acid and sulfuric acid to make acidification, dispersing acidified carbon nano tube in the SOCl2 solution to make reaction to obtain carbon nano tube with acyl chloride function group; mixing nitrodracylic acid and zinc powder in sodium hydroxide to obtain para-dihydroxyazobenzene, then mixing it and sulphoxide dichloride in chloroform to obtain p-4,4'-amide linear alkylamine azobenzene, adding p-4,4'-amide linear alkylamine azobenzene and nano tube with acyl chloride function group into tetrahydrofuran, heating and reacting for above 96h, dewatering, evaporating to obtain paste-like material, dispersing it in chloroform, filtering and drying so as to obtain the invented product.

Description

technical field [0001] The invention relates to a preparation method of a light-responsive azobenzene-grafted carbon nanotube material, which belongs to the preparation technology of light, electricity and energy conversion materials. Background technique [0002] Azo polymers are one of the research hotspots in the field of photoresponsive materials. Azo polymers refer to polymers containing azobenzene chromophores in the molecular chain (at present, the synthesized azo polymers are mainly flexible polymers such as polyesters and polyurethanes containing azobenzene groups). It uses the photo-induced cis-trans isomerization effect of the azo chromophore in the polymer to change the structure and properties of the polymer through the change of configuration or dipole moment. The degree of conjugation of the azo polymer can be controlled by controlling the frequency, intensity and irradiation time of the irradiated light (Kun Huang, Hongjin Qiu, and Meixiang Wan, Macromolecul...

Claims

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Application Information

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IPC IPC(8): C08G83/00
Inventor 封伟冯奕钰
Owner TIANJIN UNIV
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