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Hyperbranched star-shaped polyion liquid as well as preparation method and application thereof

A technology of polyionic liquid and hyperbranched poly, applied in hyperbranched star-shaped polyionic liquid HPG-PVBR+A- and its preparation, the application field of HPG-PVBR+A- in the preparation of uniform particle size gold nanoparticles, It can solve the problems of unsatisfactory stabilization of metal nanoparticles, complex synthesis methods of pure linear polymers, aggregation of metal nanoparticles, etc., and achieve the effects of preventing agglomeration, good water solubility, and uniform particle size

Inactive Publication Date: 2018-03-23
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis method of pure linear polymer is complicated and not suitable for preparation, and the stabilization effect on metal nanoparticles is not satisfactory, which easily leads to the aggregation of metal nanoparticles

Method used

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  • Hyperbranched star-shaped polyion liquid as well as preparation method and application thereof
  • Hyperbranched star-shaped polyion liquid as well as preparation method and application thereof
  • Hyperbranched star-shaped polyion liquid as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Synthesis of Hyperbranched Polyglycidol Macromolecular Chain Transfer Reagent HPG-CTA

[0050] Take 5.0 g of hyperbranched polyglycidol (branching degree: 0.61, molecular weight: 5000), 0.02 g of 4-dimethylaminopyridine in a 250 mL single-necked bottle, add 50 mL of anhydrous pyridine to dissolve. After dissolving 2.3g chain transfer agent 2-(butyl trithiocarbonate group)-2-methylpropionic acid and 1.8g dicyclohexylcarbodiimide in 30ml of anhydrous pyridine, slowly drip it into the above-mentioned hyperbranched Polyglycidol mixed solution, and then react at room temperature for 48h. The product was dropped into a large amount of diethyl ether to precipitate, and the product was vacuum-dried at 50° C. for 24 hours to obtain the macromolecular chain transfer reagent HPC-CTA.

[0051] Synthesis of Hyperbranched Star Copolymer HPG-PCMS

[0052] Add 0.5g of HPG-CTA, 0.010g of initiator azobisisobutyronitrile, and 1.5g of p-chloromethylstyrene into a 20mL polymer reaction b...

Embodiment 2

[0056] Preparation of Hyperbranched Star Polyionic Liquid Reduced Gold Nanoparticles

[0057] Under the action of magnetic stirring, slowly drop 1mL of chloroauric acid aqueous solution (1mg / mL) into 1mL of HPG-PVBMM + Cl - In an aqueous solution (5 mg / mL), the reaction was stirred and reacted for 2 days at a temperature of 40° C. in the dark to obtain an aqueous dispersion of gold nanoparticles.

Embodiment 3

[0059] Au nanoparticle composites with different particle sizes were prepared by adjusting the N / Au ratio.

[0060] Take N / Au=10 as an example: under magnetic stirring, add 1mL of chloroauric acid aqueous solution (1mg / mL) dropwise to 1mL of HPG-PVBMM+Cl- aqueous solution (5mg / mL), and then avoid light at 40°C After 2 days of reaction, a stable aqueous dispersion of gold nanoparticles was obtained.

[0061] Similarly, take N / Au=40 as an example: under magnetic stirring, add 0.25mL aqueous chloroauric acid (1mg / mL) dropwise to 1mL HPG-PVBMM + Cl - aqueous solution (5 mg / mL), and then reacted in the dark at 40° C. for 2 days to obtain a stable aqueous dispersion of gold nanoparticles.

[0062] Gold nanoparticle dispersions with different N / Au molar ratios were prepared by referring to the above experimental procedures. like Figure 4 As shown, the particle size and distribution of the prepared gold nanoparticles can be effectively controlled by adjusting the N / Au molar ratio...

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Abstract

The invention discloses a hyperbranched star-shaped polyion liquid as well as a preparation method and an application thereof. The hyperbranched star-shaped polyion liquid takes hyperbranched polyglycerol as the core and a polyion liquid as the arm and is prepared as follows: firstly, hyperbranched polyglycerol and a chain transfer agent 2-(butyl trithiocarbonate)-2-methylpropinate are subjected to a condensation reaction, a macromolecular chain transfer agent is synthesized, then, the macromolecular chain transfer agent is used for initiating RAFT polymerization of a 4-halogenated methyl styrene monomer, a hyperbranched star-shaped copolymer is obtained, finally, the hyperbranched star-shaped copolymer and a nitrogen-containing heterocyclic compound react, and the hyperbranched star-shaped polyion liquid is synthesized. The hyperbranched star-shaped polyion liquid is used as a reductant and a stabilizer during preparation of gold nanoparticles, and the gold nanoparticles with good stability and uniform particle size distribution are prepared under the mild condition.

Description

technical field [0001] The invention relates to a functional polymer material, in particular to a hyperbranched star polyionic liquid HPG-PVBR + A - And preparation method thereof, especially relate to HPG-PVBR + A - The application in the preparation of gold nanoparticles with uniform particle size belongs to the field of functional polymer materials. Background technique [0002] Hyperbranched polymers are a class of highly branched macromolecules with irregular structures. Compared with traditional linear polymers, it has many internal cavities and a large number of terminal functional groups. It has received extensive attention from scientific researchers in the fields of pharmaceutical carriers and coatings. Ionic liquids, which are liquids at room temperature, consist only of ions. At present, ionic liquids are mainly used in chemical reaction, electrochemistry, catalytic reaction and other fields. Polyionic liquids are products obtained by polymerizing ionic li...

Claims

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Application Information

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IPC IPC(8): C08F293/00C08F212/14C08F8/30B22F9/24
CPCB22F9/24B22F2009/245C08F8/30C08F212/14C08F293/005
Inventor 孙晓毅胡丙申李娟
Owner CENT SOUTH UNIV
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