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Preparation method of hybridized metal nano-particle

A technology of metal nanoparticles and hybridization, which is applied in the field of preparation of hybrid metal nanoparticles, can solve the problems of reduced particle size controllability, widened size distribution, loss of block copolymer micelles, etc.

Inactive Publication Date: 2005-10-26
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] During the filling of block copolymer micelles with reactants and the reaction process, due to the introduction of metal salts or metal ions, the fluctuation of reactant concentration during the reaction, etc., changes in the aggregation state of block copolymers will be caused, which will cause nanoreactors These changes will reduce the size controllability and broaden the size distribution of the particles in the product metal colloid, thus losing some of the theoretical advantages of block copolymer micelles as nanoreactors

Method used

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  • Preparation method of hybridized metal nano-particle

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Synthesis of macromolecular styrene initiator:

[0060] In a refluxed 250ml three-necked flask, nitrogen was introduced to replace oxygen, and 0.726g catalyst CuBr, 36ml styrene, 1.06ml N, N, N, 'N,'N"-pentamethyldiethylenetriamine were added, And start to stir, until solution becomes homogeneous phase.Inject 0.6ml initiator benzyl bromide with syringe at last.90 ℃, in nitrogen atmosphere, react 8 hours, stop reaction by quick cooling, and add 120ml tetrahydrofuran to dissolve, add 110 gram aluminum oxides to remove Copper ions are added to a mixed precipitant with a volume ratio of 1:1 methanol and water, and the product obtained by suction filtration is a macromolecular styrene initiator with a C-Br bond end group.

[0061] Synthesis of block copolymer PS-b-PtBA:

[0062] In a refluxed 250ml three-neck flask, replace the air with high-purity nitrogen, add 9.4g of the above-mentioned macromolecular styrene initiator, 0.38g of catalyst CuBr, 40ml of tert-butyl acrylate...

Embodiment 2

[0075] "Synthesis of hybrid nanoparticles in micelles" stage in Example 1, N 2 h 4 The weight dosage and AgNO 3 Be 5: 1 all the other are the same as embodiment 1.

[0076] TEM photographs of hybrid Ag nanoparticles (AgNO 3 :N 2 h 4 =1:5) see Figure 4 .

Embodiment 3

[0078] In the "synthesis of block copolymer PS-b-PtBA" stage in embodiment 1, the charging capacity of tert-butyl acrylate is 60ml, and all the other are the same as in embodiment 1.

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Abstract

A process for preparing the nanoparticles of hybrid metal includes such steps as controllable polymerizing reaction to synthesize the block copolymer which is suitable to be assembled in the selective dispersing medium to become micelles, adding metal salts or their ions to osmosize them in the micells, adding reducer, and reaction on said metal salts or their ions to obtain the nanoparticles.

Description

technical field [0001] The invention relates to a preparation method of hybrid metal nanoparticles, through the assembly of block copolymers to form nanomicelles that can be used as microreactors, so that metal salts and ions can penetrate into the micelles and enrich them, and can be stored stably after reduction. Hybrid metal nanoparticles with controllable morphology, size and distribution. technical background [0002] Nanotechnology has attracted widespread attention in many scientific fields and has become the focus of material science research. In recent years, there has been a strong interest in nano-metal nanoparticles. Due to the huge surface, unusual activity and quantum effects, metal nanoparticles have some specific properties. As catalysts, they have better selectivity and directional catalytic ability. By changing and controlling the size of magnetic particles in metal nanoparticles, the magnetic properties of materials can be fundamentally changed. Nano-met...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 周晓东温丽谭李炼林群芳
Owner EAST CHINA UNIV OF SCI & TECH
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