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Dendrimer-rare earth complex/carbon nanotube composite material and its synthesis method

A technology of dendritic polymers and rare earth complexes, which is applied in the field of polymer composite materials, can solve problems such as differences in complexation selectivity, achieve good thermal stability and dispersion, and broaden the selection range

Inactive Publication Date: 2015-11-18
ANKANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different types of functional groups coordinate different types of metal ions differently, so that their complexation selectivity is significantly different

Method used

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  • Dendrimer-rare earth complex/carbon nanotube composite material and its synthesis method
  • Dendrimer-rare earth complex/carbon nanotube composite material and its synthesis method
  • Dendrimer-rare earth complex/carbon nanotube composite material and its synthesis method

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preparation example Construction

[0027] A synthetic method of a dendrimer-rare earth complex / carbon nanotube composite material, comprising the following steps:

[0028] (1) Carbon nanotubes are dissolved in tris hydrochloride buffer solution of dopamine (0.5~5g / L) at 20~35 o Disperse at C, stir at 100~300 rpm, react for 8~24 hours, wash twice with deionized water after separation, then add to the aqueous solution of propargylamine (1~3g / L), and react again under stirring at room temperature 2 to 6 hours, centrifuged and washed 4 times with deionized water, and vacuum dried at room temperature to obtain alkyne-functionalized carbon nanotubes;

[0029] (2) In the mixed solvent of pyridine and dichloromethane, add 4-diaminopyridine, 1-azido-hexanol and isopropylidene- 2,2-bis(methoxy)propionic acid, at 20~50 o After reacting for 12 to 16 hours under C conditions, add methanol and DOWEX50W-X2-200 ion exchange resin to it, continue to react at the same temperature for 4 to 8 hours, filter and evaporate the solv...

Embodiment 1

[0036] (1) Alkyne-functionalized multi-walled carbon nanotubes

[0037] In a 50mL round-bottomed flask, add 2g of multi-walled carbon nanotubes and 10mL of dopamine (1mg / mL) tris hydrochloride buffer, react at room temperature for 12 hours, then centrifuge, wash twice with deionized water, Then dispersed in an aqueous solution of propargyl amine (1 mg / mL), stirred at room temperature for 5 hours, separated and washed 4 times with deionized water, and vacuum-dried at room temperature to obtain alkyne-functionalized multi-walled carbon nanotubes.

[0038] (2) Generation 4.0 dendrimers with 16 hydroxyl groups

[0039] In 20 mL of a mixed solvent of pyridine and dichloromethane (v / v=1:1), add 4-diaminopyridine, 1-azido-hexanol and isopropylidene- 2,2-bis(methoxy)propionic acid, 25 o After C reacted for 12 hours, 30 mL of methanol and 5 g of DOWEX50WX2-200 ion exchange resin were added thereto, the reaction was continued for 8 hours at the same temperature, the filtrate was filte...

Embodiment 2

[0050] Alkyne-functionalized multi-walled carbon nanotubes, 16-hydroxyl 4.0-generation dendrimers, 16-hydroxyl 4.0-generation dendrimers modified multi-walled carbon nanotubes, 16-alkyne 4.0-generation dendrimers Molecularly modified multi-walled carbon nanotubes and multi-walled carbon nanotubes modified by 4.0 generation dendrimers of 16 carboxyl groups such as example 1 step (1), step (2), step (3), step (4) and step (5) Made.

[0051] Disperse 0.2g of 4.0 generation dendrimer-modified multi-walled carbon nanotubes with 16 carboxyl groups in 3mL of dichloromethane, add 0.1g of terbium trichloride and 0.09g of 8-hydroxyquinoline, 25 o Stirring and reacting at C for 5 hours, after separation, washing with methanol for 4 times, and vacuum drying at room temperature, the dendrimer-terbium complex / multi-walled carbon nanotube composite material was obtained.

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Abstract

The present invention relates to a dendrimer-rare earth complex / carbon nano-tube composite material and a synthesis method thereof. According to the method, a two-step click chemical reaction is adopted to sequentially modify a dendrimer and a plurality of functional groups on the surface of carbon nano-tubes, and then coordination of the functional groups on the surface of the carbon nano-tubes and one or a plurality of types of earth ions is adopted to prepare the dendrimer-rear earth complex / carbon nano-tube composite material. The nanometer composite material has good thermal stability and good dispersity in commonly used organic solvents, wherein rear earth has a certain fluorescence characteristic, such that the material can be widely used in a plurality of fields of absorption, catalysis, imaging, optoelectronic devices and the like.

Description

technical field [0001] The invention relates to a dendrimer-rare earth complex / carbon nanotube composite material, which belongs to the technical field of polymer composite materials. Background technique [0002] Carbon nanotubes have a unique structure and excellent performance. Due to their large aspect ratio and specific surface area, high elastic modulus, bending strength and excellent electrical conductivity, carbon nanotubes have been widely used in the fields of nanotechnology and nanoelectronics. important position. However, due to their inherent insolubility, carbon nanotubes are difficult to disperse well in solutions or polymer matrices, which greatly limits their application in the field of composite materials. The currently widely used modification method of carbon nanotubes is to use mixed acid treatment to introduce carboxyl groups on the surface of carbon nanotubes, and use them as active points for grafting. This method can effectively overcome the inertn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00
Inventor 陈久存罗文谦胡敏王浩东
Owner ANKANG UNIV
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