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Method for preparing polymer film with continuous nanometer pore channels

A polymer film and nanopore technology, which is applied in the field of preparing polymer films with continuous nanopores, can solve the problems of wide channel size distribution and complex process, and achieve the effect of simple steps, low cost and good prospects for large-scale production

Active Publication Date: 2010-05-12
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of complex process and wide pore size distribution in the prior art, and provide a method for preparing polymer films with continuous nanopores

Method used

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  • Method for preparing polymer film with continuous nanometer pore channels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Weigh 1 gram of polyacrylonitrile and polyacrylic acid block copolymer (polyacrylic acid volume ratio is 10%) and dissolve it in 99 grams of dimethylacetamide to obtain a solution with a polymer weight ratio of 1%;

[0022] 2) Spin-coat the prepared block copolymer solution on the glass sheet, volatilize the solvent at 60°C for 2 hours, and then vacuum dry at 60°C for 50 hours;

[0023] 3) Immerse the silicon wafer coated with the polymer film in water with pH=12 adjusted with sodium hydroxide at 40°C for 80 hours;

[0024] 4) The silicon wafer coated with the polymer film is taken out from the solvent and dried at 65° C. for 12 hours to obtain a polymer film with continuous pores. Scanning electron micrographs of the obtained thin films with continuous nano-channels are as follows: figure 1 shown.

Embodiment 2

[0026] 1) Weigh 0.6 g of a block copolymer of polymethyl styrene and polymethacrylic acid (polymethyl methacrylate volume ratio is 20%) and dissolve it in 19.4 g of dimethyl sulfoxide to obtain a polymer weight ratio is a 3% solution;

[0027] 2) Spin-coat the prepared block copolymer solution on a clean and dry glass sheet, volatilize the solvent at room temperature for 1 hour, and then vacuum dry it at 100°C for 12 hours;

[0028] 3) Immerse the glass sheet coated with the polymer film in methanol at 50°C for 5 hours;

[0029] 4) The glass sheet coated with the polymer film is taken out from the solvent and dried at 50° C. for 2 hours to obtain a polymer film with continuous pores.

Embodiment 3

[0031] 1) Weigh 1 gram of polymethylstyrene and poly(4-vinylpyridine) block copolymer (poly(4-vinylpyridine) volume ratio is 50%) and dissolve it in 99 grams of dimethylformamide , to obtain a solution with a polymer weight ratio of 1%;

[0032] 2) Immerse the polyester plastic sheet into the prepared block copolymer solution and take it out slowly. The solvent is first volatilized at 60°C for 5 hours, and then vacuum dried at 80°C for 24 hours;

[0033] 3) Immerse the polyester plastic sheet coated with the block copolymer in ethylene glycol at 60°C for 12 hours;

[0034] 4) The polyester plastic sheet coated with the block copolymer is taken out from the solvent and dried at 60° C. for 48 hours to obtain a polymer film with continuous pores.

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Abstract

The invention relates to a method for preparing polymer film with continuous nanometer pore channels, which comprises the following steps: preparing block copolymer solution in which a block copolymer consists of a block A and a block B; smearing the prepared block copolymer solution on a substrate and volatilizing solvent to form film; immersing the substrate coated with polymer film in the solvent having the effect of selectively swelling one block of the block copolymer; and taking out the substrate coated with the polymer film from the solvent, drying the substrate and obtaining the polymer film with continuous pore channels. The method has the advantages of no relation to chemical reaction, convenience, controllability, simple steps, capability of preparing porous polymer film in large area and good prospects for mass production.

Description

technical field [0001] The invention relates to a method for a polymer film, in particular to a method for preparing a polymer film with continuous nano-pore channels, and the obtained polymer porous film can be used as separation membrane material, adsorbent, catalyst carrier, tissue engineering Scaffolds and templates for the preparation of other functional porous materials, etc. Background technique [0002] Porous polymer film materials have long been widely used in membrane separation, adsorption separation, catalyst loading, cell culture substrates, and the synthesis of porous materials by template method in the fields of chemistry, chemical industry, materials, biomedical engineering and other fields. In order to improve the performance and use effect of such materials, the comprehensive performance should be improved by reducing the pore size and pore size distribution range, connecting the pores to promote mass transfer, and increasing the porosity to increase the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J9/28C08L53/00
Inventor 汪勇范益群邢卫红
Owner NANJING UNIV OF TECH
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