Preparation method capable of achieving large-scale preparation of Fe3O4@Aucore@shell structured nanorods with controllable size and dispersion

A large-scale preparation and nanorod technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve problems such as the difficulty of synthesizing superparamagnetic Fe, and achieve high grafting density

Active Publication Date: 2018-01-09
郑州科斗科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main method used to prepare two different inorganic crystal hybrid core@shell nanostructures is the epitaxial crystal growth method, but this method has strict requirements on the matching of the lattice constants of the two cry

Method used

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  • Preparation method capable of achieving large-scale preparation of Fe3O4@Aucore@shell structured nanorods with controllable size and dispersion
  • Preparation method capable of achieving large-scale preparation of Fe3O4@Aucore@shell structured nanorods with controllable size and dispersion
  • Preparation method capable of achieving large-scale preparation of Fe3O4@Aucore@shell structured nanorods with controllable size and dispersion

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Embodiment 1

[0023] Example 1 ( figure 1 ).

[0024] The present invention will be further described below in conjunction with the examples, but the content of the present invention is not limited thereto.

[0025] (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 ...

Embodiment 2

[0032] Example 2 ( Figure 5 ): Water-dispersible superparamagnetic Fe with core@shell structure 3 o 4 Preparation of @Au nanorods.

[0033] (1) Preparation of brush-shaped triblock polymers containing two-phase template structural units: using hydroxyl-modified cellulose cellulose-Br as a macromolecular initiator, comprehensively utilizing the experimental method of ATRP technology combined with "link" chemistry, A series of brush-like two-block polymers with PEG as the outermost segment were prepared by using the monofunctional polyethylene glycol mPEG modified with an alkyne group as the precursor of the outermost block: cellulose- g -[P4VP- b -P t BA- b -PEG].

[0034] (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 250...

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Abstract

The invention discloses a preparation method capable of achieving large-scale preparation of super-paramagnetic Fe3O4@Au-core@shell structured nanorods with controllable size and dispersion, and belongs to the field of intersection of multiple subjects such as macromolecular living polymerization methods, functional polymer molecule design and inorganic crystal growth. The method comprises the following steps that (1), cellulose used for modifying hydroxide radical serves as a macromolecular initiator, and by means of a continuous polymerization ATRP technology and a linked chemical reaction,a series of brush-shaped triblock polymers cellulose-g-[P4VP-b-PAA-b-PS] and cellulose-g-[P4VP-b-PAA-b-PEG] are prepared separately, wherein the triblock polymers each comprise two template structureunits; (2), a solution-phase synthesis method serves as a basis, a certain quantity of the above-mentioned prepared brush-shaped triblock polymers serves as a monomolecular template, first section P4VP serves as a template phase, FeCl2.4H2O, FeCl3.6H2O and NH3.H2O serve as a precursor compound system, and then super-paramagnetic Fe3O4 nanorods are firstly prepared to serve as cores; and (3), similarly, a Fe3O4 nanorod system with the surface coated with a second template phase PAA serves as the monomolecular template, chloroauric acid serves as a precursor compound, tert-butylamine boron serves as a reducing agent, and then the gold nanorod shell structure is prepared.

Description

technical field [0001] The invention relates to a large-scale preparation of Fe with controllable size and dispersibility 3 o 4 The preparation method of nanorods with @Au core@shell structure belongs to polymer living polymerization method, functional polymer molecular design and Fe 3 o 4 Crystal, and Au crystal growth and other interdisciplinary fields. In particular, it relates to a method of using bottlebrush-like functional polymers as unimolecular templates, the unimolecular micellar templates contain two independent template phase units, and through in-situ crystal growth methods, the core material Fe 3 o 4 and the shell material Au are independently grown on their respective template phases to prepare a series of Fe with controllable size, aspect ratio and dispersibility. 3 o 4 @Au core@shell structured nanorods. Background technique [0002] Generally speaking, materials with a dimension of 1-100nm or more are called nanomaterials. Normally, a large number o...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y30/00B82Y40/00C08F293/00C08F226/06C08F220/18C08F212/08
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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