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Preparation method of monodisperse three-dimensional ordered porous material and prepared material

A technology for three-dimensional ordered and porous materials, which is applied in the field of preparation methods and materials prepared therefrom, can solve the problems of unsatisfactory hollow sphere shape, high cost, and inability to effectively and accurately control the macroscopic size of hollow spheres.

Active Publication Date: 2021-05-14
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hard template method has the disadvantages of cumbersome post-processing procedures, high cost, and the size of the prepared hollow spheres is often not uniform.
The surfactant used in the soft template method is highly toxic and expensive, and the prepared hollow spheres have disadvantages such as unsatisfactory morphology, poor monodispersity of the microspheres, uneven shell thickness, and disordered partial pores.
In addition, the traditional method cannot effectively and accurately control the macroscopic size of the hollow sphere

Method used

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preparation example Construction

[0042] According to the first aspect of the present invention, there is provided a method for preparing a monodisperse three-dimensional ordered porous material, comprising the following steps: the oil phase O and optionally the water phase W1, optionally the water phase W2 through a microfluidic method Obtaining O droplets, O / W2 droplets or W1 / O / W2 droplets, the droplets are solidified, template particles are removed and dried to obtain a monodisperse three-dimensional ordered porous material;

[0043] The oil phase O is obtained by uniformly mixing template particles, polymers and organic solvents to remove oxygen, or the oil phase O is obtained by uniformly mixing template particles, polymer monomers, photoinitiators and organic solvents to remove oxygen;

[0044] Both the water phase W1 and the water phase W2 independently include a dispersant.

[0045] Microfluidics refers to the way of controlling, manipulating and detecting complex fluids at microscopic scale.

[0046]...

Embodiment 1

[0092] A method for preparing monodisperse three-dimensional ordered porous hollow spheres, comprising the following steps:

[0093] (1) Mix silica microspheres with a particle size of 625nm with PS and toluene to remove oxygen evenly to obtain oil phase O, water phase W1 is 1% sodium lauryl sulfate aqueous solution, and water phase W2 is 1% polyvinyl alcohol aqueous solution;

[0094] (2) Pass the oil phase O and the water phases W1 and W2 through the microfluidic channel to obtain W1 / O / W2 droplets with a droplet size of 1000 μm;

[0095] (3) Heating the prepared W1 / O / W2 droplets in a water bath to evaporate the solvent and solidify them to obtain 845 μm hollow microspheres;

[0096] (4) Immerse the solidified hollow microspheres in a HF solution with a mass concentration of 15%, etch the silica microspheres and perform vacuum drying at room temperature to obtain monodisperse three-dimensional ordered porous hollow spheres.

[0097] Among them, the mass ratio of silica micr...

Embodiment 2

[0099] A method for preparing monodisperse three-dimensional ordered porous hollow spheres, comprising the following steps:

[0100](1) Mix silica microspheres with a particle size of 220nm with PS and toluene to remove oxygen evenly to obtain oil phase O, water phase W1 is 1% sodium lauryl sulfate aqueous solution, and water phase W2 is 1% polyvinyl alcohol aqueous solution;

[0101] (2) Pass the oil phase O and the water phases W1 and W2 through the microfluidic channel to obtain W1 / O / W2 droplets with a droplet size of 200 μm;

[0102] (3) heating the prepared W1 / O / W2 droplets in a water bath to volatilize the solvent and solidify to obtain hollow microspheres;

[0103] (4) Immerse the solidified hollow microspheres in an HF solution with a mass concentration of 3 wt %, etch the silica microspheres and perform vacuum drying at room temperature to obtain monodisperse three-dimensional ordered porous hollow spheres.

[0104] Among them, the mass ratio of silica microspheres ...

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Abstract

The invention discloses a preparation method of a monodisperse three-dimensional ordered porous material and the prepared material. The preparation method comprises the following steps: using the oil phase O and optionally the water phase W1, optionally the water phase W2 to obtain O droplets, O / W2 droplets or W1 / O / W2 droplets through a microfluidic method, the droplets After curing, removing template particles and drying, a monodisperse three-dimensional ordered porous material is obtained; the oil phase O is obtained by uniformly mixing template particles, polymers and organic solvents to remove oxygen, or the oil phase O is template particles, polymer monomers , a photoinitiator and an organic solvent are uniformly mixed to remove oxygen; both the water phase W1 and the water phase W2 independently include a dispersant. The preparation method realizes precise control of the macroscopic size and microscopic internal pores of the porous material, and can customize the size, pore size and pore distribution of the porous material. The monodisperse three-dimensional ordered porous material prepared by the invention has the advantages of uniform pore size, high pore monodispersity, orderly pore distribution and the like.

Description

technical field [0001] The invention relates to the technical field of ordered porous materials and microfluidics, in particular to a method for preparing a monodisperse three-dimensional ordered porous material and the prepared material. Background technique [0002] The uniform and ordered pore structure is an important development direction and frontier in the field of porous materials. Porous and ordered films and hollow spheres are currently the most common research. Traditionally, template methods can be used to prepare ordered porous films, such as templates such as colloidal crystals, emulsion droplets, biological bacteria, and filter membranes. It is difficult to obtain thin films with tunable size or monodisperse structure. [0003] The microscopic pore structure of the polymer hollow spherical shell is an important factor that determines the various properties of the microsphere. In ICF (Inertial confinement fusion, inertial confinement fusion) research, the por...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/26C08J5/18C08L25/06C08L25/02C08L35/02
CPCC08J5/18C08J9/26C08J2201/044C08J2325/02C08J2325/06C08J2335/02
Inventor 邵婷杨春罗炫方瑜杨睿赣蒋晓东
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS