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Preparation method of gold nanorods with large-scale preparation and controllable sizes and dispersibility

A technology for large-scale preparation of gold nanorods, applied in nanotechnology, bulk chemical production, etc., can solve the problems of difficult to achieve precise control of nanoparticle size, complex separation and purification process, and harsh preparation conditions.

Active Publication Date: 2018-01-09
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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  • Preparation method of gold nanorods with large-scale preparation and controllable sizes and dispersibility
  • Preparation method of gold nanorods with large-scale preparation and controllable sizes and dispersibility
  • Preparation method of gold nanorods with large-scale preparation and controllable sizes and dispersibility

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Embodiment 1

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

[0030] (1) Preparation and classification of ATRP macroinitiator (cellulose-Br) based on cellulose molecules: In a 250mL single-necked flask, add 10g of natural cellulose, dissolve it in 100mL of ionic liquid 1-allyl-3-methylimidazolium chloride (AMIMCl ), when completely dissolved, add 10mL anhydrous DMF and 10mL NMP respectively as diluent and acid absorbent, slowly add 50mL 2-bromoisobutyryl bromide dropwise within 1 hour under the condition of cooling to zero degree, the modified cellulose The hydroxyl group on the chain is modified to convert it into a macromolecular initiator that can be used for ATRP. Then naturally warmed to room temperature (25 o C), react at room temperature for 24 hours. Finally, 500 mL of deionized water was used as a precipitating agent to precipitate the final p...

Embodiment 2

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

[0037] (1) Preparation of brush-shaped block polymers: using cellulose-Br as a macromolecular initiator, comprehensively utilizing the experimental method of combining ATRP technology and "linkage" chemistry, modifying the terminal group into a monofunctional polyethylene with alkyne group The diol mPEG is the precursor of the outermost block, and a series of brush-like two-block polymers with the outermost segment of PEG are prepared: cellulose- g -[PAA- b -PEG].

[0038] (a) Preparation of mPEG whose end group is alkynyl group: through nucleophilic substitution reaction, prepare mPEG whose end group is alkynyl group (ie mPEG-propargyl), and use two kinds of molecular weight mPEG (referred to as mn =5,000 and mn =10,000). The specific steps are as follows: In a 250mL three-necked flask, add 10g of dry mPEG (10.0 g, 2.0mmol) whose terminal group is a hydroxyl group, and then add 150ml of dr...

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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 1-100nm or more 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...

Claims

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Application Information

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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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