Multi-component Janus composite nanometer material and preparation method thereof

A composite nanomaterial and nanomaterial technology, which is applied in the field of multi-component Janus composite nanomaterial and its preparation, can solve the problems of strict division of chemical composition, fine control of microstructure, and low solid content, etc.

Inactive Publication Date: 2018-09-14
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: the currently prevailing method of preparing streptosphere-like Janus polymer colloidal particles is mainly block copolymer crosslinking, that is, through intramolecular crosslinking of a certain block in the block copolymer to obtain the coexistence of nanocolloids and polymer single chains. Janus composite material, but this method has the disadvantage of low solid content (≤1%) (S.Mavila, O.Eivgi, I.Berkovich, N.G.Lemcof.Chem.Rev.2016,116,878-961.)
The methods that are easy to mass-produce are phase separation and interfacial nucleation, but it is difficult to achieve strict partitioning of chemical composition and fine control of microstructure in the prepared Janus materials (T.Tanaka.Langmuir 2010,26,11732-11736.)
Therefore, the complexity of the structure and function of Janus materials leads to the limitations of its preparation methods. How to quickly and easily realize the strict partitioning of the chemical composition and the fine regulation of the microstructure of Janus materials has been of great concern to researchers but has not been well resolved. issues that require further research

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  • Multi-component Janus composite nanometer material and preparation method thereof
  • Multi-component Janus composite nanometer material and preparation method thereof
  • Multi-component Janus composite nanometer material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0054] The preparation method of the above-mentioned multi-component Janus composite nanomaterial provided by the invention may further comprise the steps:

[0055] Step 1) Based on Janus nanoparticles composed of polymer single chains and nanoparticles, reactive groups are introduced into the nanoparticles in the above-mentioned Janus nanoparticles, and composite functional substances are grown to obtain Janus particles with partially grown composite functional substances. nanoparticles; and / or,

[0056] Step 2) Using free radical polymerization method, the polymer single chain part in the Janus nanoparticles of composite functional substances grown on the above-mentioned nanoparticles is grafted with polymer molecular brushes to obtain multi-component Janus composite nanomaterials.

[0057] The step 2) may also include the step of introducing a reactive functional group before the polymer single-chain part is grafted to the polymer molecular brush; the reactive functional gr...

Embodiment

[0108] Below in conjunction with specific embodiment, further set forth the present invention, should understand that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, should understand in addition, after having read the content taught by the present invention, those skilled in the art can Various changes or modifications are made to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0109] The experimental methods used in the following examples are conventional methods unless otherwise specified.

[0110] The materials and reagents used in the following examples can be obtained from commercial sources unless otherwise specified.

[0111] The two sides used in the following example are poly(p-methylstyrene) single chain and poly(4-chloromethylstyrene) single chain respectively, and the middle is the nanoparticle of ...

Embodiment 1

[0121] [Example 1] Preparation of a multi-component Janus composite nanomaterial

[0122] Step 1) The two sides of 0.6g are respectively poly(p-methylstyrene) single chain and poly(4-chloromethylstyrene) single chain, and the middle is polystyrene, polydivinylbenzene nanoparticles. Janus nanoparticles (Mn=10.6k) with a chain / sphere / chain model were dissolved in 50mL of toluene, 240mg of azobisisobutyronitrile and 1.2mL of thioglycolic acid were added to the reaction system, and stirred at 70°C for 15h under nitrogen protection . After the reaction, the reaction solution was precipitated and washed with absolute ethanol, and the sample was freeze-dried for characterization. Characterization of its composition by Fourier transform infrared spectroscopy, 1720cm -1 The characteristic absorption peak of the carboxyl group appears at the figure 2 ). Demonstrate the successful use of click reactions to introduce carboxyl groups on crosslinked nanoparticles. Dissolve 0.3 g of Ja...

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Abstract

The invention relates to a multi-component Janus composite nanometer material and a preparation method thereof. Based on Janus nanoparticle consisting of a polymer single chain and nanoparticles, themulti-component Janus composite nanometer material is prepared by growing part of composite functional materials on the nanoparticles or grafting a polymer molecular brush on the polymer single chainpart. The Janus composite nanometer particles consisting of the polymer single chain and the nanoparticles are prepared through ionic polymerization; and the structural model can be selected from anyone of polymer single chain and spherical nanoparticle connecting sequence any combination arrangement models. The functional materials are selected from metal, metal compounds and non-metallic compounds. Controllable preparation of the Janus composite nanometer material capable of accurately regulating and controlling composition and structure is realized, the excellent properties of the composite material and the nanometer material are combined, and important significance in the fields of catalysis, medicine controlled release, enzyme fixation, pollutant treatment and the like is achieved.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a multi-component Janus composite nanomaterial and a preparation method thereof. Background technique [0002] Janus comes from ancient Roman mythology, a god with two faces, one looking at the past and the other facing the future. In 1991, in his Nobel acceptance speech, de Gennes first used the word Janus to describe anisotropic particles (P.G.de Gennes.Rev.Mod.Phys.1992,64,645-648.). Janus materials are anisotropic materials with different compositions and properties (A.Perrro, S.Reculusa, S.Ravaine, E.Bourgeat-Lamic, E.Duguet.J.Mater.Chem.2005,15,3745-3760 .). In the past 20 years, Janus materials have developed rapidly, showing many novel properties and attractive application prospects, although important progress has been made in the preparation methods and performance research of related materials (F.X.Liang, C.L.Zhang, Z.Z.Yang.Adv.Mater .2014,26,6944-6949.), but the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/02C08F220/54C08F220/34C08F220/18C08K3/22C08K3/08C08K3/36C08F283/10
CPCC08F257/02C08F283/10C08K3/08C08K3/22C08K3/36C08K2003/0831C08K2003/2275C08K2201/011C08F220/54C08F220/34C08F220/18
Inventor 杨振忠杨雯智贾凡姜秉寅井静云姚晓辉
Owner INST OF CHEM CHINESE ACAD OF SCI
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