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A kind of ion-selective nano channel membrane and preparation method thereof

An ion-selective, nano-channel technology, applied in the field of energy, can solve problems such as failure to meet expectations and restrict application development, and achieve the effects of reducing transmembrane impedance, promoting ion diffusion and the generation of diffusion potential, and increasing open circuit voltage

Active Publication Date: 2020-09-04
BEIJING SCITECH NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ion flux and selectivity of the currently prepared ion channel membranes are far from expected due to the limitations of their own thickness and functional groups, which also restricts their application development.

Method used

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  • A kind of ion-selective nano channel membrane and preparation method thereof
  • A kind of ion-selective nano channel membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 Shown, a kind of preparation method of ion-selective nanochannel membrane, described method comprises the steps:

[0038] 1) forming a sacrificial layer on a solid substrate to obtain a solid substrate coated with a sacrificial layer;

[0039] Suspension-coat sodium polystyrene sulfonate with a mass fraction of 5% on a silicon wafer at a rotational speed of 1600 r / s for 120 s.

[0040] 2) The block copolymer 1 is dissolved in the selective solvent 1, and a film is formed on a solid substrate coated with a sacrificial layer to form a block copolymer 1 film;

[0041] A poly(ethylene oxide-methacrylate) toluene solution with a mass fraction of 4% was suspended-coated on the silicon wafer coated with the sacrificial layer of sodium polystyrene sulfonate at a rotational speed of 1600 r / s for 60 s.

[0042] 3) heat treatment and light treatment of the block copolymer 1 film;

[0043] Vacuum treatment at a high temperature of 80 degrees Celsius for 4 hours...

Embodiment 2

[0052] Such as figure 1 Shown, a kind of preparation method of ion-selective nanochannel membrane, described method comprises the steps:

[0053] 1) forming a sacrificial layer on a solid substrate to obtain a solid substrate coated with a sacrificial layer;

[0054] Suspension-coat sodium polystyrene sulfonate with a mass fraction of 5% on a silicon wafer at a rotational speed of 1600 r / s for 120 s.

[0055] 2) The block copolymer 1 is dissolved in the selective solvent 1, and a film is formed on a solid substrate coated with a sacrificial layer to form a block copolymer 1 film;

[0056] A poly(ethylene oxide-methacrylate) toluene solution with a mass fraction of 4% was suspended-coated on the silicon wafer coated with the sacrificial layer of sodium polystyrene sulfonate at a rotational speed of 1600 r / s for 60 s.

[0057] 3) heat treatment and light treatment of the block copolymer 1 film;

[0058] Vacuum treatment at a high temperature of 80 degrees Celsius for 4 hours...

Embodiment 3

[0067] Such as figure 1 Shown, a kind of preparation method of ion-selective nanochannel membrane, described method comprises the steps:

[0068] 1) forming a sacrificial layer on a solid substrate to obtain a solid substrate coated with a sacrificial layer;

[0069] Suspension-coat sodium polystyrene sulfonate with a mass fraction of 5% on a silicon wafer at a rotational speed of 1600 r / s for 120 s.

[0070] 2) The block copolymer 1 is dissolved in the selective solvent 1, and a film is formed on a solid substrate coated with a sacrificial layer to form a block copolymer 1 film;

[0071] A poly(ethylene oxide-methacrylate) toluene solution with a mass fraction of 4% was suspended-coated on the silicon wafer coated with the sacrificial layer of sodium polystyrene sulfonate at a rotational speed of 1600 r / s for 60 s.

[0072] 3) heat treatment and light treatment of the block copolymer 1 film;

[0073] Vacuum treatment at a high temperature of 80 degrees Celsius for 4 hours...

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Abstract

An ion-selective nanochannel membrane and a preparation method therefor. The ion-selective nanochannel membrane comprises two layers of membranes bonded together, one layer being a segmented copolymer 1 membrane and the other layer being a segmented copolymer 2 membrane. The nanochannel membrane has submicron-order thickness, has a regular nano-scale channel distribution and high porosity, the channel diameter being below 25 nm, and the two membranes having different surface charge distributions. The membrane has ultra-high ion flux, superior ion selectivity, and submicron-order thickness, displaying excellent osmotic energy conversion performance.

Description

technical field [0001] The invention belongs to the field of energy technology, in particular, the invention relates to an ion-selective nano-channel membrane and a preparation method thereof. Background technique [0002] With the rapid development of human society, non-renewable fossil energy is on the verge of exhaustion. Facing the energy crisis worldwide, people must use new methods and technologies to find and utilize renewable clean energy that exists widely in nature. Osmotic energy is a kind of chemical potential difference energy existing in water systems with different concentrations. At present, the traditional osmotic energy harvesting device (ie, reverse electrodialysis device) is composed of a series of staggered anion exchange membranes and cation exchange membranes. The steric hindrance encountered in the ion transport process is relatively large, which greatly The energy output density of energy conversion equipment is limited; in addition, the expensive m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L53/00
CPCC08J5/18C08J2353/00C08L53/00C08J5/20C08J5/22
Inventor 闻利平张振江雷
Owner BEIJING SCITECH NANOTECH CO LTD
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