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Method for constructing functional ordered porous membrane by taking honeycomb-shaped porous membrane as template

A porous membrane and honeycomb-shaped technology, which is applied in the field of preparation of functional ordered porous composite membranes, can solve problems such as difficult to meet complex applications, limit the application of ordered porous membranes, and do not have composite functional materials, so as to achieve selective induction The effect of distribution, short preparation cycle and simple technical process

Active Publication Date: 2014-12-10
YANGZHOU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the above two ordered porous membranes are polymer membranes with the same material and single function, which do not have the properties of composite functional materials, and it is difficult to meet the needs of complex applications, which limits the application of ordered porous membranes.

Method used

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  • Method for constructing functional ordered porous membrane by taking honeycomb-shaped porous membrane as template
  • Method for constructing functional ordered porous membrane by taking honeycomb-shaped porous membrane as template
  • Method for constructing functional ordered porous membrane by taking honeycomb-shaped porous membrane as template

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preparation example Construction

[0029] The preparation method of the porous membrane in the present invention is as follows: the polymer is dissolved in an organic solvent to form a solution with a certain concentration, and the solution is allowed to stand. Take 10~100μL of polymer solution on a clean glass slide with a micro-sampler, and blow the surface of the solution with water-saturated moist air. After the solvent and water are volatilized, a honeycomb porous membrane is obtained. The pore size of the porous membrane can be adjusted by changing the concentration of the solution, the humidity and the amount of liquid added to obtain a porous membrane with a diameter of 200nm~10μm and a monodisperse pore size. The change in pore size is shown in Figure 1.

[0030] The principle of preparing porous membrane by this method is [μ. H. F. Bμnz, Advanced Materials 18, 973-989(2006)]: after the polymer solution is poured onto the substrate, the solvent volatilizes, causing the solution membrane and the surroun...

Embodiment 1

[0038]Take a certain amount of polymer polystyrene / acrylic block copolymer and dissolve it in chloroform, let it fully dissolve, and prepare a solution with a concentration of 1 wt%. Then take 100 μL of the polymer solution on a clean glass slide with a micro-sampler, and blow the surface of the solution with water-saturated moist air. After the solvent and water are volatilized, a honeycomb porous membrane is obtained. Take it out and observe the quality of the porous membrane with an optical microscope or a field emission scanning electron microscope.

[0039] Then immerse the ordered porous membrane in the aqueous dispersion of 2 mg / mL ceria nanoparticles and let it stand for 24 hours, finally take out the porous membrane and dry it to obtain a functional ordered porous composite membrane. The effect of selective distribution of nanoparticles was observed with scanning electron microscopy.

Embodiment 2

[0041] Take a certain amount of polymer polystyrene / acrylic block copolymer and dissolve it in chloroform, let it fully dissolve, and prepare a solution with a concentration of 5wt% for later use. Then use a micro-sampler to take 50 μL of the polymer solution on a clean glass slide, and blow the surface of the solution with water-saturated moist air. After the solvent and water are volatilized, a honeycomb porous membrane is obtained. Take it out and observe the quality of the porous membrane with an optical microscope or a field emission scanning electron microscope.

[0042] Then immerse the ordered porous membrane in a 5 mg / mL aqueous dispersion of ceria nanoparticles and let it stand for 20 hours, and finally take out the porous membrane and dry it to obtain a functional ordered porous composite membrane. The effect of selective distribution of nanoparticles was observed with scanning electron microscopy.

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Abstract

The invention relates to a new method for preparing a functional ordered porous composite membrane by virtue of a honeycomb-shaped porous membrane with assistance of nanoparticles. The new method for preparing the functional ordered porous composite membrane comprises the following steps: preparing a highly ordered porous membrane by utilizing a water drop templating method; then immersing the ordered porous membrane into water or other dispersion liquids of nanoparticles with given size and charges on the surfaces, realizing directed self-assembly of different nanoparticles on the surface of the porous membrane by utilizing hydrophility and hydrophobility of the honeycomb-shaped porous membrane and the effect of the honeycomb-shaped porous membrane of screening inorganic or organic nanoparticles with different surface charges, and realizing highly ordered selective distribution of the nanoparticles on the porous membrane under the action of electrostatic adsorption; and finally taking out the porous membrane, and airing, so that the functional ordered porous composite membrane is obtained. The new method for preparing the functional ordered porous composite membrane is simple in technology, short in preparation period, high in efficiency, easy in control and good in repeatability, multiple functional ordered porous composite membranes can be grown, and the new method for preparing the functional ordered porous composite membrane is applicable to highly ordered selective distribution of nanoparticles in multiple particle sizes and kinds.

Description

technical field [0001] The invention relates to the field of material chemistry, in particular to a method for preparing a functional ordered porous composite membrane. Background technique [0002] Ordered porous materials have important application prospects in the fields of catalyst loading, gas sensor devices, photoelectric devices, cell culture substrates, adsorption or separation media, etc. A series of methods for preparing ordered porous materials have been developed, such as lithography, etching, templating, self-assembly, and water droplet templating. Among many methods, the water droplet template method has attracted extensive attention from researchers at home and abroad because of its advantages such as simple process, mild experimental conditions, and regular and controllable structure. After the previous methodological system research, new development trends and hotspots have appeared in the research of the water droplet template method in recent years, mainl...

Claims

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Application Information

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IPC IPC(8): C08J7/00C08J9/28C08J5/18C08K7/18C08K3/36C08K3/22
Inventor 张明陈海燕朱婷徐维超
Owner YANGZHOU UNIV
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