A method for preparing a large number of uniform non-spherical janus particles

A non-spherical and uniform technology, applied in the field of colloid chemistry, can solve the problems of rough surface of particles, serious particle agglomeration phenomenon, etc., and achieve the effect of wide application range, mild conditions and simple operation.

Active Publication Date: 2020-11-17
SHAANXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few ways to prepare non-spherical particles, mainly solvent swelling and volatilization method or thermal deformation method. The former first swells spherical particles in organic solvent, and then protects one side so that the other side is placed in the air, and the other side is placed in the air. The organic solvent in half of the particles will produce asymmetric deformation during the volatilization process, but the particles produced by this method have poor uniformity and serious particle agglomeration, which cannot be mass-produced; The environment deforms the particles, but this method will destroy the structure of the particles to a certain extent, and the surface of the produced particles is rough, and the adhesion between the particles is serious

Method used

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  • A method for preparing a large number of uniform non-spherical janus particles
  • A method for preparing a large number of uniform non-spherical janus particles
  • A method for preparing a large number of uniform non-spherical janus particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add polystyrene microspheres with a particle size of 1.2 μm into a mixture of 2 mL of ethanol and 8 mL of deionized water, ultrasonically disperse for 10 min, and mix evenly, and then slowly add the resulting dispersion into a container filled with 80 mL of deionized water. In a 100mL beaker, it quickly forms a single layer of large-area close-packed polystyrene microspheres at the gas-liquid interface. Then place the beaker inside a 1000mL beaker, pour 20mL of dichloromethane into the 1000mL beaker, seal it and let it stand for 5min, the volatilized dichloromethane gas will engrave the part of the polystyrene microsphere exposed above the water surface. eclipse, get as figure 1 Non-spherical polystyrene particles are shown.

Embodiment 2

[0018] In the present embodiment, the sealing time of resting is 45min, and other steps are identical with embodiment 1, obtain figure 2 Non-spherical polystyrene particles are shown.

Embodiment 3

[0020] In the present embodiment, the sealing time of resting is 95min, and other steps are identical with embodiment 1, obtain image 3 Non-spherical polystyrene particles are shown.

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Abstract

The invention discloses a method for preparing mass uniform non-spherical Janus particles. The method is capable of, based on a gas-liquid interface, using uniform monodispersion colloid particles asa raw material, using a volatile solvent as an etching agent, and preparing the non-spherical particles in regular and various morphologies along with the time extension, wherein a size of the particles is adjusted according to a size of template particles, and a productive rate is up to 95% or more. The non-spherical particles belong to one type of Janus asymmetrical particles, can be used for the self-assembly simulation of the colloid particles, and are beneficial to know a self-assembly phenomenon of the microcosmic colloid particles by people.

Description

technical field [0001] The invention belongs to the technical field of colloid chemistry, and in particular relates to a method for asymmetrically etching colloid particles by using volatilized gas from volatile organic solvents to prepare a large number of non-spherical particles. Background technique [0002] At present, the main methods for preparing asymmetric colloidal particles are: phase separation method, microfluidic method, interface protection method (two-dimensional, three-dimensional, etc.), block copolymer self-assembly method, etc. These methods use spherical particles as templates or as products. , use chemical or physical methods to make the chemical composition or chemical structure of the spherical particle hemisphere different from the other side, and then obtain asymmetric particles with different functions. There are few ways to prepare non-spherical particles, mainly solvent swelling and volatilization method or thermal deformation method. The former f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/12C08J7/16C08L25/06C08L33/12
CPCC08J7/12C08J7/16C08J2325/06C08J2333/12
Inventor 邓字巍刘晓洋苟欣瑜郭英英
Owner SHAANXI NORMAL UNIV
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