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A preparation method for large-scale preparation of gold nanorods with controllable size and dispersion

A large-scale preparation technology of gold nanorods, applied in nanotechnology, bulk chemical production, etc., can solve problems such as difficult to achieve precise control of nanoparticle size, difficult large-scale preparation, and uneven nanostructure

Active Publication Date: 2020-01-17
郑州科斗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (1) It is difficult to achieve precise control of the size of nanoparticles;
[0010] (2) The separation and purification process is complicated and difficult to prepare on a large scale;
[0011] (3) The preparation conditions are harsh;
[0012] (4) The prepared nanostructure is not uniform;

Method used

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  • A preparation method for large-scale preparation of gold nanorods with controllable size and dispersion
  • A preparation method for large-scale preparation of gold nanorods with controllable size and dispersion
  • A preparation method for large-scale preparation of gold nanorods with controllable size and dispersion

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Embodiment 1

[0029] Example 1 ( figure 1 ) The present invention will be further described below in conjunction with embodiment, but content of the present invention is not limited thereto.

[0030] (1) Preparation and classification of ATRP macroinitiator cellulose-bromoisobutyrate based on cellulose molecules: In a 250mL single-necked flask, add 10g of natural cellulose, dissolve in 100mL ionic liquid 1-allyl chloride -In 3-methylimidazole (AMIMCl), when it is completely dissolved, add 10mL of anhydrous DMF and 10mL of NMP respectively as diluent and acid absorbent, slowly add 50mL of 2-bromoiso Butyryl bromide modifies the hydroxyl group on the modified cellulose chain, making it a macromolecular initiator that can be used for ATRP. Then the temperature was naturally raised to room temperature (25° C.), and the reaction was carried out at room temperature for 24 hours. Finally, 500 mL of deionized water was used as a precipitating agent to precipitate the final product. Then, 50 mL o...

Embodiment 2

[0036] Example 2 ( Image 6 ) Preparation of water-dispersible gold nanorods.

[0037] (1) Preparation of brush-shaped block polymers: using cellulose-bromoisobutyrate as a macromolecular initiator, comprehensively utilizing the experimental method of combining ATRP technology with "link" chemistry, modifying the end group as an alkyne group The monofunctional polyethylene glycol mPEG is the precursor of the outermost block, and a series of brush-like diblock polymers with the outermost PEG are prepared: cellulose-g-[polyacrylic acid-b-polyethylene glycol ].

[0038] (a) Preparation of mPEG whose end group is alkynyl: by nucleophilic substitution reaction, the preparation of mPEG whose end group is alkynyl (i.e. mPEG-propargyl, methoxypolyethylene glycol propargyl), two molecular weights used mPEG (for Mn=5,000 and Mn=10,000 respectively). The specific steps are as follows: In a 250mL three-necked flask, add 10g of dry mPEG (10.0g, 2.0mmol) whose terminal group is a hydroxy...

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Abstract

The invention discloses a preparation method of gold nanorods with large-scale preparation and controllable sizes and dispersibility, and belongs to the multidisciplinary field of polymeric activity polymerization methods, functional polymer molecular design, inorganic crystal growth, etc. The method comprises the steps: (1) taking ionic liquid AMIMCl as solvents, and anhydrous dimethylformamide and N-Methyl pyrrolidone (NMP) as diluents and acid absorbents separately, applying 2-bromoisobutyryl bromide to hydroxyls on a cellulose chain, and converting the hydroxyls into macroinitiators whichcan be used for atom transfer radical polymerization (ATRP); (2) preparing a series of brushy two-block polymers: cellulose-g-[PAA-b-PS] and cellulose-g-[PAA-b-PEG] with a continuous ATRP technology,a technology of combination of ATRP and Click Chemistry and other technologies by taking cellulose-Br as the macroinitiators; and (3) preparing the gold nanorods with oil dispersibility and water dispersibility based on a solution phase synthesis method by taking a certain amount of the brushy two-block polymers as monomolecular templates, chloroauric acid (HAuCl4.3H2O) as precursor compounds andtert-butylamine boron (TBAB) as reducing agents.

Description

technical field [0001] The invention relates to a preparation method capable of large-scale preparation of gold nanorods with controllable size and dispersion, which belongs to the interdisciplinary fields of polymer living polymerization method, functional polymer molecular design and inorganic crystal growth. In particular, it relates to a method for preparing a series of gold nanorods with controllable size, controllable aspect ratio and controllable dispersion by using a bottlebrush-like functional polymer as a single-molecule template through in-situ crystal growth. Background technique [0002] Since German scientist Gleiter first prepared nanocrystals of copper, iron, and palladium in 1984, the study of nanomaterials has gradually become a research hotspot. Generally speaking, materials with a dimension of 1 to 100 nm are called nanomaterials. Normally, a large number of free electrons in the inside and surface of precious metals such as gold and silver will form a f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00C08F293/00C08F2/44B82Y40/00
CPCY02P20/54
Inventor 庞新厂国金龙裴东杰王乐张志林周地广
Owner 郑州科斗科技有限公司
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