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A kind of janus material of polymer single chain/nanoparticle composite structure and its cationic-initiated double-bond polymerization preparation method

A technology of cationic polymerization and polymer chain, which is applied in the field of Janus material and its cation-initiated double bond polymerization preparation, which can solve the problems of lack of controllable and high solid content batch preparation of composite Janus materials.

Inactive Publication Date: 2019-04-09
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

There is still a lack of controllable and high-solid-content batch preparation of functional composite Janus materials that can achieve precise composition and structure control and size at the nanoscale

Method used

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  • A kind of janus material of polymer single chain/nanoparticle composite structure and its cationic-initiated double-bond polymerization preparation method
  • A kind of janus material of polymer single chain/nanoparticle composite structure and its cationic-initiated double-bond polymerization preparation method
  • A kind of janus material of polymer single chain/nanoparticle composite structure and its cationic-initiated double-bond polymerization preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0055] The preparation of embodiment one ball model Janus material

example 1

[0057] Add boron trifluoride ether solution (25μl) into dichloromethane (5ml), mix well, add styrene monomer (0.05ml), stir and react at room temperature for 15min, add pre-mixed volume ratio 9:1 ​​3-formylstyrene, divinylbenzene monomer (0.5ml), continue to react at room temperature for 15min, stop the reaction solution with absolute ethanol, precipitate, wash, and freeze-dry the sample. Solid content 11%. Transmission electron microscopy showed that there were about 2nm nanoparticles; dynamic light scattering showed that there was a single peak (about 5nm).

example 2

[0059] Add boron trifluoride ether solution (25μl) into dichloromethane (5ml), mix well, add p-methylstyrene monomer (0.05ml), stir and react at room temperature for 15min, then add pre-mixed Styrene and divinylbenzene monomers (1.0ml) with a good volume ratio of 9:1, after continuing to react at room temperature for 15 minutes, the reaction solution was terminated with absolute ethanol, precipitated, washed, and the sample was freeze-dried. Solid content 21%. TEM ( figure 1 ) shows the presence of about 2nm nanoparticles; dynamic light scattering ( figure 2 ) characterizes the presence of a single peak (about 5nm); the infrared spectrum shows that the characteristic peak of polystyrene appears.

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Abstract

The invention provides a Janus material with a polymer sinlge-chain / nanoparticle composite structure, and a cationic initiation double-bond polymerization preparation method thereof. The Janus nanometer material is prepared by initiating a monomer containing double bonds by cation to perform polymerization; the structure model can be selected from any combined arrangement of connecting sequences of chain and ball structure units and at least contains one ball structure; the chemical composition and the polymerization degree of polymer single chain can be adjusted; and the chemical composition and the size of the nanoparticles are controllable. The Janus material with multiple potential functionalities and with accurately controlled composition and structures can be prepared quickly in batches; and the material combines excellent properties of the polymer single chain and the nanoparticles, and has important significance in the fields of catalysis, oil-water separation, water body purification, cell identification and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a Janus material with a polymer single chain / nanoparticle composite structure and a preparation method for cationic-initiated double-bond polymerization. Background technique [0002] Janus originated from the double-faced god of ancient Roman mythology. In 1991, de Gennes first proposed the term Janus to describe those particles with dual properties in structure or composition (de Gennes, P.G. SoftMatter. Science. 1992, 256(5056), 495-497). Janus materials with dual properties are a new class of materials with unique microstructure and functionality, and have important application prospects in many fields. There are still many problems in the existing methods of preparing Janus materials. The most commonly used interface protection method (Wang, B. Amphiphilic Janus Gold Nanoparticles via Combining "Solid-State Grafting-to" and "Grafting-from" Methods. Jo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F212/08C08F212/14C08F212/36C08F212/12C08F230/08C08F216/12
CPCC08F212/08C08F212/12C08F212/14C08F212/36C08F216/12C08F230/08C08F293/00
Inventor 杨振忠井静云姜秉寅
Owner INST OF CHEM CHINESE ACAD OF SCI
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