Magnetic nanoparticle/macromolecular Janus microparticle and preparation method and application thereof

A technology of magnetic nanoparticles and high molecular polymers, applied in the field of magnetic nanoparticle/polymer composite Janus particles and its preparation, which can solve the problems of restricting the application research of Janus particle related properties, difficult to control the morphology and properties of particles, and monodisperse particles Poor performance and other problems, to achieve the effect of common equipment, good monodispersity and powerful functions

Active Publication Date: 2016-04-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These existing methods have problems such as low yield, poor monodispersity of the prepared particles, and difficulty in controlling the morphology and properties of the particles, which limits the research and further application of Janus particles.

Method used

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  • Magnetic nanoparticle/macromolecular Janus microparticle and preparation method and application thereof
  • Magnetic nanoparticle/macromolecular Janus microparticle and preparation method and application thereof
  • Magnetic nanoparticle/macromolecular Janus microparticle and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] 1) 0.7 mg of Fe with a particle size of 10 nm 3 o 4 Nanoparticles, 13 mg of polystyrene with a weight average molecular weight of 3500 and 13 mg of polypyrrolidone with a weight average molecular weight of 8000 were dissolved in 10 mL of dichloromethane, and the resulting mixed solution was used as a dispersed phase;

[0045] The continuous phase was a 0.20 wt% aqueous solution of sodium dodecylsulfonate.

[0046] The dispersed phase and the continuous phase were injected into different channels of the microfluidic chip, the injection rate of the dispersed phase was 100uL / min; the injection rate of the continuous phase was 5mL / min; the dispersed phase was sheared by the continuous phase in the microfluidic chip Cut into highly monodisperse magnetic monoemulsion droplets of 5 µm.

[0047] 2) The single emulsion droplet system obtained in step 1) was left to stand at room temperature for 40 minutes, and then the droplets were placed in a 450G magnetic field for 30 minut...

Embodiment 2

[0050] 1) 0.7 mg of Fe with a particle size of 10 nm 3 o 4 Nanoparticles, 13 mg of polystyrene with a weight average molecular weight of 3500 and 13 mg of polylactic acid with a weight average molecular weight of 7000 were dissolved in 10 mL of methylene chloride, and the resulting mixed solution was used as a dispersed phase;

[0051]The continuous phase is a 0.25 wt% aqueous solution of sodium dodecylsulfonate.

[0052] The dispersed phase and the continuous phase were injected into different channels of the microfluidic chip, the injection rate of the dispersed phase was 100uL / min; the injection rate of the continuous phase was 5mL / min; the dispersed phase was sheared by the continuous phase in the microfluidic chip Highly monodisperse magnetic monoemulsion droplet system cut into 10 microns.

[0053] 2) The single emulsion droplet system obtained in step 1) was left to stand at room temperature for 40 minutes, and then the droplets were placed in a 350G magnetic field fo...

Embodiment 3

[0056] 1) 0.7 mg of Fe with a particle size of 10 nm 3 o 4 Nanoparticles, 0.01 mmol green fluorescein (purchased from Sigma-Aldrich Company), 13 mg of polystyrene with a weight average molecular weight of 3500, and 13 mg of polylactic acid with a weight average molecular weight of 7000 were dissolved in 10 mL of dichloromethane to obtain The mixed solution is used as the dispersed phase;

[0057] The continuous phase is a 0.25 wt% aqueous solution of sodium dodecylsulfonate.

[0058] The dispersed phase and the continuous phase were injected into different channels of the microfluidic chip, the injection rate of the dispersed phase was 100uL / min; the injection rate of the continuous phase was 5mL / min; the dispersed phase was sheared by the continuous phase in the microfluidic chip Cut into highly monodisperse magnetic monoemulsion droplets of 9 µm.

[0059] 2) The single emulsion droplet system obtained in step 1) was left to stand at room temperature for 50 minutes, and th...

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Abstract

The invention discloses a magnetic nanoparticle / macromolecular Janus microparticle and a preparation method and application thereof. The method comprises the following steps: (1) respectively charging a dispersion phase and a continuous phase into different passages in a micro-fluidic chip, finally mixing the dispersion phase with the continuous phase, and obtaining a single-emulsion-drop system on the other end of the micro-fluidic chip, wherein the dispersion phase is prepared from magnetic nanoparticles, a macromolecular polymer and an organic solvent, and the continuous phase is an aqueous solution of a surface active agent; (2) standing the single-emulsion-drop system obtained in the step (1) at room temperature, then standing in a magnetic field, after the standing is completed, heating to remove the organic solvent in the system, and washing with water. The method is novel, simple in process, common in equipment, good in operability and powerful in functions. The obtained microparticle is good in single monodispersion and has magnetism; and other functional materials can be added, so that integration of multiple functions of the material is realized.

Description

technical field [0001] The invention belongs to the field of inorganic-organic composite materials, and relates to a magnetic nanoparticle / polymer composite Janus particle and a preparation method and application thereof. Background technique [0002] Janus particles refer to having two completely different regions in the same particle system, integrating different chemical components, polarity, functions or other properties. Compared with particles with symmetrical structures, Janus particles exhibit many special properties due to their unique anisotropy, for example: Janus particles are easy to be asymmetrically modified; Janus particles have strong adsorption properties on the interface; each The anisotropic structure makes Janus particles have a special aggregation behavior, which is very easy to self-assemble and further assemble into large aggregates with multi-level structures or new functional materials. These characteristics of Janus particles provide an ideal scie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/42C08J3/12B01J13/06
CPCB01J13/06C08J3/12C08J2325/06C08J2339/04C08J2367/04C08J2425/06C08J2439/04C08J2467/04H01F1/42
Inventor 姚立王秀瑜
Owner INST OF CHEM CHINESE ACAD OF SCI
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