Method for preparing large-area orderly porous membrane

A porous membrane, large-area technology, applied in the field of preparation of large-area ordered porous membranes, can solve the problems of inability to take into account the preparation of porous membranes with nano-scale pore size and micro-scale pore size, inability to achieve large areas, and increased production costs, etc. Simple structure, improved stability and cost saving effect

Active Publication Date: 2016-07-20
CHANGZHOU SHICHUANG ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the water droplet template method commonly used at present, most of the polymers must have a specific molecular structure, and there are problems such as difficult synthesis, complicated preparation, and high cost.
[0003] Some literatures have also mentioned the use of simple-structured and cheap polymers to form honeycomb-shaped regular and ordered membranes, but due to the rough process and the backwardness of the corresponding equipment, it is impossible to achieve a large area and can only be prepared in the laboratory. The small area of ​​the membrane hinders the application of this method in practical production
[0004] And the general preparation process route of ordered porous membrane can only prepare porous membrane with nanoscale pore size, or can only prepare porous membrane with micron pore size, and cannot take into account the preparation of nanoscale pore size and micron pore size porous membrane through one process route.
When enterprises produce porous membranes with different pore sizes, they need to change the process route, which increases the production cost

Method used

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  • Method for preparing large-area orderly porous membrane
  • Method for preparing large-area orderly porous membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Dissolve polystyrene, polyvinylpyrrolidone, polyethylene glycol and cocamidopropyl betaine in carbon disulfide to prepare a polymer solution with a polymer concentration of 10mg / ml;

[0036] (2) Drop the prepared polymer solution onto the surface of the single crystal silicon wafer and place it in a closed container;

[0037] (3) Pour steam into the closed container from below the monocrystalline silicon wafer, and adjust the relative humidity in the closed container by controlling the flow rate and temperature of the steam, control the relative humidity at 80%, and keep the monocrystalline silicon wafer in a stable state Let stand for 10 minutes in a humidity atmosphere of 5%; the steam is generated by the gas passing through the liquid environment; the gas is high-purity (90% or 95% purity) nitrogen; the liquid environment contains deionized water, methanol, and isopropanol ,Isobutanol;

[0038] (4) Take out the monocrystalline silicon wafer from the humidity atmosphere...

Embodiment 2

[0041] (1) Dissolve polylactic acid-glycolic acid copolymer and betaine citrate in chloroform to prepare a polymer solution with a polymer concentration of 25mg / ml;

[0042] (2) Drop the prepared polymer solution onto the surface of the glass sheet and place it in a closed container;

[0043] (3) Pass steam into the closed container from under the glass sheet, and adjust the relative humidity in the closed container by controlling the flow rate and temperature of the steam, control the relative humidity at 60%, and keep the glass sheet in a stable humidity atmosphere Let stand for 20 minutes; the steam is generated by the gas passing through a liquid environment; the gas is high-purity (100% purity) nitrogen; the liquid environment contains deionized water, ethanol, ethylene glycol, and isobutanol;

[0044] (4) Remove the glass sheet from the humidity atmosphere and dry it to obtain an ordered porous film.

[0045] The pore size of the ordered porous membrane obtained in this example ...

Embodiment 3

[0047] (1) Dissolve polystyrene, polyethylene glycol and decyl diphenyl sulfonate in a mixed solvent of carbon disulfide and tetrahydrofuran to prepare a polymer solution with a polymer concentration of 20 mg / ml;

[0048] (2) Drop the prepared polymer solution onto the surface of the polyester film and place it in a closed container;

[0049] (3) Pass steam into the closed container from below the polyester film, and adjust the relative humidity in the closed container by controlling the flow rate and temperature of the steam. The relative humidity is controlled at 60%, and the humidity of the polyester film in a stable state Let stand in the atmosphere for 30 minutes; the steam is generated by the gas passing through the liquid environment; the gas is compressed air; the liquid environment contains deionized water, isopropanol, ethylene glycol, and isobutanol;

[0050] (4) Take out the polyester film from the humidity atmosphere and dry it to obtain an ordered porous film.

[0051] T...

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Abstract

The invention discloses a method for preparing a large-area orderly porous membrane. The method comprises the following steps: (1) dissolving a polymer and a surfactant into a solvent so as to prepare a polymer solution; (2) dropwise adding the prepared polymer solution to the surface of a substrate, and putting the substrate into a closed container; (3) introducing steam into the closed container from the downside of the substrate, controlling relative humidity to a stable state, and carrying out standing on the substrate for a certain time in a stable-state humidity atmosphere; (4) taking the substrate out of the humidity atmosphere, and drying the substrate, thereby obtaining the orderly porous membrane. According to the method, the preparation of nanoscale-pore-size and micron-scale-pore-size porous membranes can be taken into account by one process route, and the process route is not required to be changed during the production of the porous membranes of different pore sizes, so that the production cost is reduced; the large-area orderly porous membrane with high stability can be prepared.

Description

Technical field [0001] The invention relates to a method for preparing a large-area ordered porous membrane. Background technique [0002] The existing common water drop template method is a dynamically controllable templated self-assembly method that can be widely applied to polymers and nanomaterials. Different from the cumbersome steps of the conventional template method, the water drop template method uses water as a medium to achieve a one-step preparation process, and has huge application potential in the fields of chemistry, biology, optics, and microelectronics. However, in the commonly used water drop template method, most of the polymers must have a specific molecular structure, which has problems such as difficulty in synthesis, complicated preparation, and high cost. [0003] Some documents have also mentioned the use of simple and inexpensive polymers to form honeycomb-like regular and ordered membranes. However, due to the rough process and backward equipment, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L25/06C08L39/06C08L67/04C08L71/02
CPCC08J9/28C08J2325/06C08J2339/06C08J2367/04C08J2371/02
Inventor 刁华鑫杨立功
Owner CHANGZHOU SHICHUANG ENERGY CO LTD
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