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Polymer/precious metal nanoparticle hybrid hollow intelligent microsphere and preparation method thereof

A technology of nanoparticles and precious metals, which is applied in the field of polymer/noble metal nanoparticle hybrid smart hollow microspheres and its preparation, can solve the problems of lack of hollow structure and single structure of hollow spheres, and achieve the effect of broad application prospects

Inactive Publication Date: 2012-06-13
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hybrid hollow spheres prepared by self-assembly technology are basically limited to two-block copolymers. The hollow spheres have a relatively simple structure and simple functions, because this technology requires that the block copolymer must have a suitable hydrophilic-lipophilic value, otherwise no hollow structure can be obtained by assembly (LiYT, Macromolecules.; 2007, 40, 8524)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Add 0.136g of initiator BMP, 0.075g of catalyst CuCl, 0.13g of complexing agent PMDETA and 15g of monomer tBA into a 25mL sealed tube. Vacuumize and fill with nitrogen in an ice-water bath, repeat 3 times, and seal the tube under vacuum. React in an oil bath at 90°C for 8h to stop the reaction. Dissolve the polymer with dichloromethane, pass through neutral Al 2 o 3 The chromatographic column removes impurities such as catalysts. Precipitate in methanol and dry in vacuo to give PtBA as a white solid;

[0023] 2. Add 2.75g initiator PtBA, 0.031g catalyst CuCl, and 0.067g complexing agent Me to a 25mL sealed tube 6 TREN, a mixed solvent of butanone / isopropanol with a volume ratio of 6:4 and the second monomer NIPAM. Vacuumize and fill with nitrogen in an ice-water bath, repeat 3 times, and seal the tube under vacuum. React in a water bath at 40°C for 48h and stop the reaction. Dissolve the polymer with dichloromethane, pass through neutral Al 2 o 3 The chromat...

Embodiment 2

[0029] 1. Using the poly-tert-butyl acrylate homopolymer described in Example 1, add 2.75g initiator PtBA, 0.031g catalyst CuCl, 0.067g complexing agent Me respectively in a 25mL sealed tube 6 TREN, 5mL DMF / H 2 O mixed solvent and the second monomer DMAEMA of 3g. Vacuumize and fill with nitrogen in an ice-water bath, repeat 3 times, and seal the tube under vacuum. React in a water bath at 40°C for 5h to stop the reaction. Dissolve the polymer with dichloromethane, pass through neutral Al 2 o 3 The chromatographic column removes impurities such as catalysts. Repeated precipitation in methanol / water, vacuum drying to obtain light yellow solid PtBA-b-PDMAEMA;

[0030] 2. Add 20 mL of dichloromethane, 1.5 g of PtBA-b-PDMAEMA and 1 mL of trifluoroacetic acid into a 50 mL Erlenmeyer flask, and stir at 20° C. for 10 h. The solvent was removed by rotary evaporation, dialyzed with water, and freeze-dried to obtain the hydrolyzate P(AA-co-tBA)-b-PDMAEMA.

[0031] 3. Dissolve 0.50...

Embodiment 3

[0034] 1. Using the poly-tert-butyl acrylate homopolymer described in Example 1, add a certain amount of 2.75g initiator PtBA, 0.031g catalyst CuCl, 0.067g complexing agent Me respectively in a 25mL sealed tube 6 TREN, 3 mL of toluene solvent and 5 g of the second monomer 4-vinylpyridine. Vacuumize and fill with nitrogen in an ice-water bath, repeat 3 times, and seal the tube under vacuum. React in a water bath at 40°C for 72h and stop the reaction. Dissolve the polymer with dichloromethane, pass through neutral Al 2 o 3 The chromatographic column removes impurities such as catalysts. Repeated precipitation in methanol / water, vacuum drying to obtain light yellow solid PtBA-b-P4VP;

[0035] 2. Add 10 mL of dichloromethane, 0.5 g of PtBA-b-P4VP and 0.6 mL of trifluoroacetic acid into a 50 mL Erlenmeyer flask, and stir at 20°C for 3 h. The solvent was removed by rotary evaporation, dialyzed with water, and freeze-dried to obtain the hydrolyzate P(AA-co-tBA)-b-P4VP.

[0036]...

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Abstract

The invention relates to a polymer / precious metal nanoparticle hybrid hollow intelligent microsphere and a preparation method thereof. The polymer / precious metal nanoparticle hybrid hollow microsphere comprises the following components in percentage by weight: 0.001 to 0.01 percent of precious metal nanoparticles and 99.99 to 99.999 percent of polymer. The experimental results of p-nitrophenol catalytic reduction tests show that the polymer / precious metal nanoparticle hybrid hollow intelligent microsphere prepared by the method has high catalytic activity at room temperature and is adjustablein catalytic activity. The hybrid hollow intelligent microsphere having novel structural characteristics and adjustable performance is hopeful to have important application in efficient selective catalysis, biomedicine and other wide fields.

Description

technical field [0001] The invention belongs to the field of polymer science and technology, in particular to a polymer / noble metal nanoparticle hybrid intelligent hollow microsphere and a preparation method thereof. Background technique [0002] Noble metal nanoparticles have unique stability related to size, small size effect, quantum effect, surface effect and biological affinity, etc. As a good classical nanomaterial, it is a research hotspot in optics, electronics, catalysis and biomedicine. Ideal noble metal nanomaterials or composites require noble metal nanoparticles with limited size and shape, modified organic and / or biomolecules on the surface, special composite structures (such as core-shell structure) and the ability to transform in 2-D or 3D. Ordered arrangements in -D space or devices, which often have different properties than individual particles and macroscopic entities. Therefore, it is a research trend in this field to synthesize noble metal nanoparticl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02B01J35/08B01J37/02B01J23/38
Inventor 陈熙
Owner TIANJIN POLYTECHNIC UNIV
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