Preparation method of nanopore cellular membrane

A technology of honeycomb membrane and nanopore, applied in the field of material chemistry

Active Publication Date: 2014-07-23
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows for easy preparation of very small pores on polymer films with high precision through use of special materials called polysilene (PS). These tiny holes allow fluids or gases from one side of the film to pass into another part instead of being blocked up inside itself.

Problems solved by technology

This patented describes how it works for creating tiny holes in various types of material like ceramics, plastics, metal foils, etc., which makes them more useful because they have specific properties depending upon their intended use. To achieve this, researchers developed methods to control these small openings within certain dimensions through manipulation of molecular structures during manufacturing process steps.

Method used

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[0014] The preparation method of the nanoporous honeycomb membrane is: select a suitable solvent, configure a polymer solution with a concentration of 6 mg / mL ~ 14 mg / mL; coat the polymer solution on the surface of the substrate, and place it in a place with a relative humidity of 60%~ In 90% normal temperature atmospheric environment, let it stand for 30 seconds to 4 minutes, and after the solvent is completely volatilized, a honeycomb film with a nanopore structure is prepared, and the pore size range is 10 nanometers to 100 nanometers; the solvent is carbon disulfide, chloroform , dichloromethane or toluene; the substrate is silicon wafer, glass, gold wafer, silver wafer, polyester film or polyimide film.

[0015] The polymer described is double-terminated polystyrene, namely B-PS n -A, see structural formula I,

[0016] .

[0017] The B terminal group in the double-terminal polystyrene is hydrophobic, and it is any one of a straight-chain alkyl group containing 4 to 21...

Embodiment 1

[0021] Octafluoro-terminated / diethylene glycol amine-terminated polystyrene (polymerization degree 50, B5-PS 50 -A2) is a film-forming polymer, dissolved in carbon disulfide to prepare a homogeneous solution with a concentration of 8 mg / mL, coated on the surface of polyester film, placed in a normal temperature atmosphere with a relative humidity of 85%, and allowed to stand for 1 minute. After the solvent is completely volatilized, a honeycomb membrane with a nanoscale pore diameter is prepared, and the pore diameter is about 45 nanometers.

Embodiment 2

[0023] Octafluoro-terminated / ethanolamine-terminated polystyrene (degree of polymerization 50, B5-PS 50 -A1) is a film-forming polymer, dissolved in carbon disulfide to prepare a homogeneous solution with a concentration of 14 mg / mL, coated on the surface of the polyester film, placed in a normal temperature atmosphere with a relative humidity of 90%, and allowed to stand for 1 minute. After the solvent is completely volatilized, a honeycomb membrane with a nanoscale pore diameter is prepared, and the pore diameter is about 75 nanometers.

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Abstract

The invention discloses a preparation method of a nanopore cellular membrane. The method comprises the following steps: preparing a 6mg/mL to 14mg/mL polymer solution by selecting a proper solvent; coating the polymer solution on the surface of a substrate and standing in a normal-temperature atmospheric environment with the relative humidity of 60% to 90% for 30 seconds to 4 minutes; and obtaining the cellular membrane with a nanopore structure after the complete volatilization of the solvent, wherein the pore diameter of the cellular membrane ranges from 10nm to 100nm; the solvent is selected from carbon disulfide, chloroform, dichloromethane or toluene; and the substrate is selected from a silicon slice, glass, a gold slice, a silver slice, a polyester film or a polyimide film. According to the method disclosed by the invention, the cellular membrane with the surface-layer nanopore structure is prepared via a spirogram method by only adopting the double-end based functionalized linear polystyrene. As a result, the smallest pore is prepared up to now via the spirogram method.

Description

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Claims

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Application Information

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Owner ZHEJIANG UNIV
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