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Proton enhanced transport forward osmosis membrane, preparation method and application thereof

A forward osmosis membrane, proton technology, used in chemical instruments and methods, semi-permeable membrane separation, membranes, etc., can solve the problems of not reaching the limit of transmission efficiency, unsatisfactory proton transmission efficiency, etc., and achieve excellent ion exchange capacity, high porosity The effect of high efficiency and good compatibility

Pending Publication Date: 2022-01-28
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Forward osmosis (FO) membrane is a key component of osmotic bioelectrochemical system (OsBES) and plays an important role in proton transport. Transmission efficiency is not ideal
Because these ordinary forward osmosis (FO) membranes only have osmotic function and have no specific selectivity for protons, they can only migrate from the anode chamber to the cathode chamber with water molecules under the action of osmotic pressure difference. The transmission efficiency of protons is far from reaching the limit, and there is still a lot of room for improvement

Method used

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  • Proton enhanced transport forward osmosis membrane, preparation method and application thereof
  • Proton enhanced transport forward osmosis membrane, preparation method and application thereof
  • Proton enhanced transport forward osmosis membrane, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Prepare a proton enhanced transport forward osmosis membrane, the specific preparation method is as follows:

[0042] 1. Disperse MIL-53 (Fe) nanoparticles uniformly in N,N-dimethylformamide (DMF) solvent according to the concentration requirement of 0.1wt%, then add polysulfone particles (polysulfone particles after adding polysulfone particles The mass concentration is 5wt%), heated to 60°C and stirred for 12h, prepared to obtain a uniform and stable mixed matrix casting solution containing MIL-53 (Fe), left to defoam for 24h; then pour the above casting solution on a clean On the glass plate, adjust the height of the scraper to 150 μm, scrape the film at a constant speed, then quickly immerse the glass plate in the pure water coagulation bath for 30 minutes, take out the formed phase inversion base film from the coagulation bath, and rinse it with deionized water repeatedly to obtain protons. The self-supporting polymer base film with enhanced transport was placed in...

Embodiment 2

[0047] Prepare a proton enhanced transport forward osmosis membrane, the specific preparation method is as follows:

[0048] 1. According to the requirement that the concentration is 10wt%, the Zn 3 BDC·2BTC nanoparticles are uniformly dispersed in N,N-dimethylacetamide (DMAc) solvent, then add polyethersulfone particles (the mass concentration of polyethersulfone particles after adding polyethersulfone particles is 20wt%), heat and stir 12h, the preparation contains Zn 3 The uniform and stable mixed matrix casting solution of BDC·2BTC, let it stand for degassing for 24 hours; pour the above casting solution on a glass plate, adjust the height of the scraper to 200 μm, scrape the film at a constant speed, and then quickly immerse the glass plate in pure water to solidify After 30 minutes, remove the formed phase inversion supporting basement membrane from the coagulation bath, and rinse it repeatedly with deionized water to obtain a self-supporting polymer basement membrane w...

Embodiment 3

[0053] Prepare a proton enhanced transport forward osmosis membrane, the specific preparation method is as follows:

[0054] 1. According to the requirement that the concentration is 5wt%, the Ni-CPO-27 nanoparticles are uniformly dispersed in the N-methylpyrrolidone (NMP) solvent, and then the polyacrylonitrile particles are added (the mass of the polyacrylonitrile particles after adding the polyacrylonitrile particles Concentration is 30wt%), heated and stirred for 12h, prepared a uniform and stable mixed matrix casting solution containing Ni-CPO-27, left to stand for degassing for 24h; poured the above casting solution on a clean glass plate, and adjusted the height of the scraper to 150 μm, scrape the film at a constant speed, and then quickly immerse the glass plate in the pure water coagulation bath for 30 minutes, then take out the formed phase inversion base film from the coagulation bath, and rinse it repeatedly with deionized water to obtain a self-supporting polymer ...

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Abstract

The invention relates to a proton enhanced transport forward osmosis membrane, a preparation method and application thereof, and belongs to the technical field of osmosis membrane materials. The invention provides a preparation method of a proton enhanced transport forward osmosis membrane. The method comprises the following steps: respectively introducing metal organic framework nanoparticles into a support base membrane prepared by a phase inversion method and / or a salt intercepting layer prepared by an interfacial polymerization method so as to prepare a composite forward osmosis membrane with efficient proton transport performance. According to the invention, metal organic framework nanoparticles have ultrahigh specific surface area, high porosity and easiness in functionalization, and have good compatibility with a membrane so as to provide extra abundant proton transmission channels for the forward osmosis membrane, so that the prepared self-supporting nano-composite forward osmosis membrane has excellent ion exchange capacity, conductivity and proton transmission flux, and can effectively improve the pollutant degradation efficiency, the electricity generation amount and the water yield when being applied to an osmosis bioelectrochemical system.

Description

technical field [0001] The invention belongs to the technical field of separation membrane materials, and relates to a proton enhanced transport forward osmosis membrane and a preparation method and application thereof. Background technique [0002] Osmotic Bioelectrochemical System (Osmotic Bioelectrochemical System, OsBES) is a new wastewater treatment process developed in recent years. This new synergistic system combines the advantages of forward osmosis (Forward Osmosis, FO) and bioelectrochemical system (Bioelectrochemical System, BES). The function of recycling components such as matter, energy, and water molecules. However, since the cathode of the osmotic bioelectrochemical system (OsBES) is easily alkalized during operation, this will not only cause a negative shift in the cathode potential, resulting in an increase in the pH gradient between the cathode and the anode, resulting in problems of overpotential and voltage loss, but also The higher reverse salt flux ...

Claims

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Application Information

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IPC IPC(8): B01D61/00B01D67/00B01D69/10B01D69/12B01D71/76C02F3/00C02F3/34C08G83/00C02F101/30
CPCB01D61/002B01D69/10B01D67/0013B01D67/0016B01D69/105B01D69/125B01D67/0095B01D71/76C02F3/005C02F3/34C08G83/00B01D2325/021B01D2323/12C02F2101/30
Inventor 刘鸿田恩玲殷逢俊郑磊宋诚
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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