Method for self-assembly growth of three-dimensional ordered polyporous material

A three-dimensional ordered, porous material technology, applied to ceramic products, other household utensils, household utensils, etc., can solve the problems of incomplete crystal growth, colloidal particles are not resistant to high temperature, etc., to reduce pressure, growth temperature, and boiling point Effect

Active Publication Date: 2009-05-13
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for self-assembled growth of three-dimensional ordered porous materials, which basically overcomes the inapplicability of existing methods when applied to cooperative self-assembled growth of multi-component colloidal crystals and their three-dimensional ordered porous materials. When the colloidal particles are too large or the boiling point of the solvent in the colloidal solution system is too high or the colloidal particles are not resistant to high temperature or cannot complete crystal growth, etc.

Method used

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  • Method for self-assembly growth of three-dimensional ordered polyporous material
  • Method for self-assembly growth of three-dimensional ordered polyporous material
  • Method for self-assembly growth of three-dimensional ordered polyporous material

Examples

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Effect test

Embodiment 1

[0034] Embodiment 1, the preparation of porous membrane of silicon dioxide inverse opal structure with a pore size of 451nm

[0035] On the aforementioned device, using the method of combining the characteristic infrared light assistance and reducing the pressure provided by the present invention, the three-dimensional polystyrene / silica binary colloidal crystal with an aperture of 451nm and its inverse opal structure porous silica can be self-assembled and grown. film, the specific steps are:

[0036] (1) Turn on the constant temperature heating device 2 and set the temperature at 40°C. After about 1 to 2 hours, the temperature in the constant temperature device will be uniform and stable;

[0037] (2) the monodisperse polystyrene bead (its particle diameter is 451nm) that contains content is 0.8wt% (weight percent) and content is 0.4wt% (weight percent) silica nanoparticle (its particle diameter is 7nm) aqueous solution into the growth deposition bottle 1, and then ultrason...

Embodiment 2～6

[0050] Examples 2-6. Preparation of a series of polystyrene beads / silica self-assembled binary colloidal crystals with different particle sizes and three-dimensional porous photonic crystal films

[0051]With reference to the method in Example 1, the content of silica nanoparticles (7nm in diameter) used is 0.6wt%, and the growth temperature and pressure are respectively 35°C and 5kPa, changing the polystyrene bead diameter, content, and growth time and illumination distance (as shown in Table 1), a series of three-dimensional photonic crystal films with different apertures were prepared. The transmittance spectrum of the series of photonic crystal films with inverse opal structure (111) was measured, and the measured band gap depths were all greater than 50%, which are listed in Table 1.

[0052] Table 1. Preparation parameters and optical properties of inverse opal-structured silica 3D photonic crystal films with different apertures

[0053]

[0054] Comparative examples...

Embodiment 7～11

[0064] Examples 7-11. Preparation of a series of silica spheres / polystyrene nanoparticles binary three-dimensional colloidal crystals with different particle sizes and photonic crystal films with inverse opal structure

[0065] With reference to the method in Example 1, a series of silica beads / polystyrene nanoparticles binary three-dimensional colloidal crystal films with different particle sizes were prepared, and after the silicon dioxide was removed by chemical etching, polystyrene with different pore sizes were obtained. Three-dimensional photonic crystal thin films. The diameter, content, growth temperature, pressure and light distance of silica spheres are listed in Table 1. The transmittance spectrum of the series of inverse opal photonic crystal films (111) direction incident light was measured, and the band gap positions and depths are listed in Table 4.

[0066] Table 4. Preparation parameters and optical properties of inverse opal polystyrene 3D photonic crystal f...

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Abstract

The invention relates to a method for self-assembly growth of three-dimensional orderly porous materials, which is a method for self-assembly growth of multi-component material colloid crystals with single structures or composite structures and three-dimensional orderly porous membranes by combining assistant acceleration of evaporation through characteristic infrared light and the control of the boiling temperature of a solvent by decompression. The method basically overcomes the defect that the prior method is not suitable for the situations of overlarge colloid particles, overhigh boiling point of the solvent in a colloidal solution system, no high temperature resistance of the colloid particles, incapability of completing crystal growth and so on when the prior method is applied to cooperated self-assembly growth of the multi-component colloid crystals and three-dimensional orderly porous materials of the multi-component colloid crystals. The method has the characteristics of high efficiency, easy control, simple operation and good repeatability, can grow the high-quality multi-component colloid crystals and the three-dimensional orderly porous membranes, and is suitable for self-assembly and cooperated self-assembly of multi-component colloid particle mixed systems with various particle diameters and various varieties.

Description

technical field [0001] The invention relates to a method for self-assembling and growing a three-dimensional ordered porous material, in particular to a method for growing a three-dimensional ordered porous material with the assistance of characteristic infrared light and decompression self-assembly. Background technique [0002] Ordered porous materials have great application value in many fields of chemistry, physics and biology such as photocatalysis, photoelectric devices, biosensing, molecular separation and adsorption, and photonic crystals. Therefore, its preparation and properties have been studied for a long time. received widespread attention. The preparation methods of porous materials mainly adopt micromachining etching technology, holographic interference method, and self-organized growth methods of particles such as template-filling method and cooperative self-assembly method. [0003] Among them, the preparation process of the two methods of micromachining et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00
Inventor 孟庆波郑中玉高奎意
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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