A kind of high flux composite membrane, its preparation method and application

A composite membrane, high-throughput technology, applied in chemical instruments and methods, membrane technology, life-saving equipment, etc., can solve the problems of portable products, inability to meet the standards of direct access to surface water for purification and drinking, and inability to remove them at the same time. achieve light weight

Active Publication Date: 2022-04-12
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Nevertheless, none of the above methods can be made into portable, light-weight, and fast water purification products to carry with you, or cannot meet the standards for direct drinking and purification of various surface waters. The core difficulty lies in the inability to remove pathogenic bacteria in surface water at the same time , organic molecules such as microparticles, heavy metal ions, dyes, and antibiotics; and high permeability, which meets the amount of water that an ordinary adult can flow through after sucking

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  • A kind of high flux composite membrane, its preparation method and application
  • A kind of high flux composite membrane, its preparation method and application
  • A kind of high flux composite membrane, its preparation method and application

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[0036] As an aspect of the technical solution of the present invention, it relates to a method for preparing a high-throughput composite membrane, which includes:

[0037] Uniformly disperse the conductive polymer porous material and silicon-based porous material in the polymer gel precursor to form a mixed solution;

[0038] Forming the mixed solution into a membrane structure, and performing a cross-linking treatment to form a composite gelled film;

[0039] The composite gelled film is subjected to directional freeze-thaw treatment, and then dried to obtain a high-throughput composite film.

[0040] In some preferred embodiments, the preparation method specifically includes:

[0041] (1) Dispersing conductive polymer porous micropowder and silicon-based porous powder in polymer gel precursor;

[0042] (2) After the above solution is stirred evenly, it is printed into a film, cross-linked, and forms a composite gelled film;

[0043] (3) Directly freeze-thaw the above-ment...

Embodiment 1

[0082] (1) Preparation of composite precursor: 1 g polypyrrole airgel micropowder (diameter range 500 nm-300 microns, specific surface area 1000 m 2 / g) and 99g mesoporous silica powder (size 1-500 micron, specific surface area 1200m 2 / g) dispersed in 200g polytetrafluoroethylene solution, mechanically stirred and mixed.

[0083] (2) Preparation of composite gelled film: Mix the above mixture evenly, prepare a composite film with a thickness of 500 μm by roller printing method, cure and cross-link at 120° C. to obtain a composite gelled film.

[0084] (3) The composite gelled film was spread on a metal freezing platform, frozen at -20°C for 5 hours, and then thawed, and repeated twice. Then use supercritical carbon dioxide to dry (the drying temperature is 35° C., and the drying pressure is 9 MPa), and dry for 10 hours to obtain a high-flux composite membrane. figure 1 It is a schematic diagram of the synthetic route of the high-flux composite membrane, figure 2 The scann...

Embodiment 2

[0086] (1) Preparation of composite precursor: 20g of polyaniline foam micropowder (diameter range 100nm-100micron, specific surface area 100m 2 / g) and 80g silica airgel powder (size 100-1000nm, specific surface area 820m 2 / g) was dispersed in 100 g of polystyrene toluene solution, and mixed by mechanical stirring.

[0087] (2) Preparation of composite gelled film: Mix the above mixture evenly, prepare a composite film with a thickness of 412 μm by roller printing method, cure and cross-link at 80° C. to obtain a composite gelled film.

[0088] (3) The composite gelled film was spread on a metal freezing table, frozen at -40°C for 1 hour, and then thawed, and repeated 4 times. Drying under reduced pressure (at a drying temperature of 40° C.) for 60 minutes was then used to obtain a high-flux composite membrane. figure 1 It is a schematic diagram of the synthetic route of the high-flux composite membrane, image 3 The scanning electron microscope image of the obtained high...

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Abstract

The invention discloses a high-flux composite membrane, its preparation method and application. The preparation method includes: uniformly dispersing the conductive polymer porous material and the silicon-based porous material in the polymer gel precursor to form a mixed solution; making the mixed solution form a membrane structure, and performing cross-linking treatment to form a composite A gelled film; performing directional freezing-thawing treatment on the composite gelled film, followed by drying to obtain a high-throughput composite film. The water flux of the high-flux composite membrane obtained by the present invention is greater than 500L / m 2 hPa, the permeation pressure is 0.01-100Pa, water can quickly pass through the composite membrane under its own gravity, can filter more than 99.99% of pathogenic bacteria, and absorb more than 99.9% of heavy metal ions, dyes, antibiotics and mustard gas, Sarin and other toxic gases, etc. The high-throughput composite membrane of the present invention is folded and packaged, and can be used to prepare portable and fast-purifying water cups, water pipes, and anti-virus respiratory nasal masks.

Description

technical field [0001] The invention relates to a high-flux composite membrane, a preparation method thereof, and an application of the high-flux composite membrane, belonging to the technical field of membrane preparation. Background technique [0002] In order to make the water quality meet the standards specified by the relevant departments, some physical, chemical or biological means can be used to treat the water. At present, the commonly used water purification methods mainly include sediment filtration, distillation, reverse osmosis, ultrafiltration, solar evaporation, adsorption, etc. The sediment filtration method can remove the suspended particulate matter or colloidal matter in the water source. This is the oldest and simplest water purification method, but it cannot block the ions dissolved in the water. Distillation is also an ancient but effective water treatment method. It can remove any non-volatile impurities, but it can do nothing for volatile pollutants. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00A62B23/06A47G19/22C02F1/44
CPCB01D69/12B01D67/0079A62B23/06A47G19/2211C02F1/44
Inventor 王锦李清文
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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