Method for preparing quantum point with hyperbranched polymer supermolecule nano-reactor

A technology of hyperbranched polymers and nanoreactors, applied in chemical instruments and methods, luminescent materials, etc.

Inactive Publication Date: 2009-01-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After complexing hyperbranched polymers and long-chain fatty acids, they can self-assemble into amphiphilic supramolecular nanomicelles. However, the method of using this supramolecular nanomicelles to prepare quantum dots with uniform size in the water-oil two-phase system has not been reported so far. See the report

Method used

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  • Method for preparing quantum point with hyperbranched polymer supermolecule nano-reactor
  • Method for preparing quantum point with hyperbranched polymer supermolecule nano-reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: Add 197 mg of palmitic acid to a 100 ml reaction bottle, add 40 ml of chloroform to dissolve it, then add 117 mg of hyperbranched amidoamine polymer, and stir for 12 hours at room temperature.

[0021] The second step: add 8 mg of Cd(AC) to the chloroform solution obtained above 2 5 ml of aqueous solution, sealed with a glass stopper, and stirred at room temperature for 48 hours.

[0022] Step 3: Store in a separatory funnel, and separate the chloroform solution in the lower layer into a reaction bottle. Nitrogen for 10-15 minutes, then add 2 ml, the concentration is 0.39mg / ml, and the Na after deoxygenation 2 Put the aqueous solution of S into the reaction bottle, continue to pass nitrogen gas for 10 minutes, and continue stirring at normal temperature for about 1 hour. Static separation can give clear light yellow CdS chloroform solution.

[0023] Such as figure 1 As shown, the ultraviolet-visible spectrum of the CdS quantum dots prepared in this example s...

Embodiment 2

[0025] Step 1: Add 235 mg of palmitic acid to a 100 ml reaction bottle, then add 40 ml of chloroform to dissolve it, then add 120 mg of hyperbranched polyethyleneimine, and stir for 12 hours at room temperature.

[0026] The second step: add 8 mg of Cd(ClO) to the chloroform solution obtained above 4 ) 2 5 ml of aqueous solution, sealed with a glass stopper, and stirred at room temperature for 48 hours.

[0027] Step 3: Store in a separatory funnel, and separate the chloroform solution in the lower layer into a reaction bottle. Nitrogen gas for 10-15 minutes, then add 2 ml, the concentration is 0.98 mg / ml, and the Na after deoxygenation 2 Put the aqueous solution of S into the reaction bottle, continue to pass nitrogen gas for 10 minutes, and continue stirring at normal temperature for about 1 hour. Static separation can give clear light yellow CdS chloroform solution.

[0028] The transmission electron microscope image of the prepared CdS quantum dots is as follows figu...

Embodiment 3

[0030] Step 1: Add 142 mg of palmitic acid to a 100 ml reaction bottle, then add 40 ml of chloroform to dissolve it, then add 124 mg of hyperbranched sulfone-amine polymer, and stir at room temperature for 12 hours.

[0031] The second step: add 8 mg of Cd(NO) to the chloroform solution obtained above 3 ) 2 5 ml of aqueous solution, sealed with a glass stopper, and stirred at room temperature for 48 hours.

[0032] Step 3: Store in a separatory funnel, and separate the chloroform solution in the lower layer into a reaction bottle. Nitrogen for 10-15 minutes, then add 2 ml, the concentration is 1.17 mg / ml, and the Na after deoxygenation 2 Put the aqueous solution of S into the reaction bottle, continue to pass nitrogen gas for 10 minutes, and continue stirring at normal temperature for about 1 hour. The light yellow chloroform solution of CdS quantum dots can be obtained by static separation.

[0033] The properties of the product obtained in this example were tested by ult...

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Abstract

The invention relates to a preparation method for quantum dot by using an ultra-branch type polymer supermolecule nano-reactor, which belongs to the chemical field. The method of the invention adopts a principle that the assembling precedes the sealing, the ultra-branch type polymer and long chain fatty acld can become amphiphilic supermolecule nano-micelle by self-assemble after compounding, and then quantum dots with homogeneous dimensions can be prepared by using the supermolecule nano-micellse in an oil-water biphasic system. The synthetic CdS quantum dots of the invention are provided with a narrow size distribution and a good stability. Because the dimensions of ultra-branch type polymer and long chain fatty acld are adjustable, the dimension and the shape of the obtained supermolecule nano-micelle are easy to be controlled, so that the supermolecule nano-micelle can be used for preparing quantum dots with various dimensions and shapes. In addition, the supermolecule nano-micelle is provided with invertibility, the micelle can be destroyed through adding spasmolytol or adjusting pH value, thus the CdS quantum dots synthesized in an organic system can be transferred into an aqueous phase system.

Description

technical field [0001] The invention relates to a preparation method in the technical field of chemical engineering, in particular to a method for preparing quantum dots using a hyperbranched polymer supramolecular nanoreactor. Background technique [0002] The hyperbranched polymer molecule has an irregular three-dimensional quasi-spherical structure, and the molecule contains linear, branched and terminal structural units. Some functional groups are located on the surface of the molecule, and some exist in the interior of the molecule; the hyperbranched polymer has good solubility and is small solution and melt viscosity, with a large number of terminal functional groups and intramolecular voids, etc. In addition, the synthesis process of hyperbranched polymers is simple and can be synthesized by one-step method. Hyperbranched polymers have good application prospects in drug carriers, polymer catalysts, curing agents, solvent-free coatings and polymer processing aids, etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/56
Inventor 石云峰屠春来朱琦朱新远颜德岳
Owner SHANGHAI JIAO TONG UNIV
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