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Polyether sulfone ultrafiltration membrane with tea polyphenol and polyvinyl alcohol as additives and preparation method thereof

A polyethersulfone ultrafiltration membrane and polyvinyl alcohol technology, applied in ultrafiltration, chemical instruments and methods, membranes, etc., can solve the problems of poor interception effect, poor anti-pollution ability, low permeation flux, etc., and increase hydrophilicity , increase permeation flux, improve the effect of interception rate

Inactive Publication Date: 2022-02-18
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, polyethersulfone is used as an ultrafiltration membrane matrix material, often due to its hydrophobicity, resulting in low permeation flux during application, poor retention effect and membrane anti-fouling ability, and the contradiction between permeation flux and rejection rate. Relationship (trade-off effect)

Method used

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  • Polyether sulfone ultrafiltration membrane with tea polyphenol and polyvinyl alcohol as additives and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) 12-hour polyether sulfone 15g, polyvinylpyrrolidone 2g, dissolved into dimethyl sulfoxide at room temperature; magnetic stir;

[0029] (2) Add 0.1 g of tea polyphenol, 0.4 g of polyvinyl alcohol, ultrasonic dispersion for 30 min, and stirred at 90 degrees Celsius, and dissolve uniform, dehydrate 3 h, to obtain a polyether sulfone cast film solution;

[0030] (3) Pour the cast film onto the glass plate, and scratch it on a clean glass plate with a glass rod in a room temperature environment of a relative humidity, and after 30 seconds in the air, the polyethersulfone cast film fluid is placed. The glass plate is slowly immersed in the room temperature in deionized water, soaking for 3 days, replacement of deionized water every 12 hours to obtain a polyether sulfone film;

[0031] (4) After the obtained PES membrane is taken out, it is hanging in a dust-free room temperature environment, which is a tea polyphenol-polyvinyl alcohol-polyether sulfone ultrafiltration membran...

Embodiment 2

[0039] (1) 12-hour polyether sulfone 15g, polyvinylpyrrolidone 2g, dissolved into dimethyl sulfoxide at room temperature; magnetic stir;

[0040] (2) 0.2 g of tea polyphenols, 0.4 g of polyvinyl alcohol, ultrasonic dispersion of 30 min, stirred at 90 degrees Celsius, and dissolve uniform, dehydrated for 3 hours, to obtain a polyether sulfone cast film fluid;

[0041] (3) Pour the cast film onto the glass plate, and scratch it on a clean glass plate with a glass rod in a room temperature environment of a relative humidity, and after 30 seconds in the air, the polyethersulfone cast film fluid is placed. The glass plate is slowly immersed in the room temperature in deionized water, soaking for 3 days, replacement of deionized water every 12 hours to obtain a polyether sulfone film;

[0042] (4) After the obtained PES membrane is taken out, it is hanging in a dust-free room temperature environment, which is a tea polyphenol-polyvinyl alcohol-polyether sulfone ultrafiltration membrane....

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Abstract

The invention discloses a polyether sulfone ultrafiltration membrane with pure natural green tea extract tea polyphenol and polyvinyl alcohol as additives and a preparation method thereof. The preparation method comprises the following steps: forming a hydrophilic functional layer on the surface of hydrophobic polyethersulfone by utilizing hydrogen-bond interaction of tea polyphenol and polyvinyl alcohol to perform hydrophilic modification on the polyethersulfone ultrafiltration membrane, drying polyethersulfone and polyvinylpyrrolidone, dissolving the polyethersulfone and polyvinylpyrrolidone in dimethyl sulfoxide, adding tea polyphenol and polyvinyl alcohol, uniformly dispersing in an ultrasonic dispersion instrument, heating to 90 DEG C, and fully stirring and dissolving to prepare a membrane casting solution a; standing and defoaming the prepared membrane casting solution a, reversely scraping a membrane from the membrane casting solution, standing in air, then putting into a deionized water coagulating bath to form a membrane, and soaking with deionized water to obtain the tea polyphenol and polyvinyl alcohol modified polyethersulfone ultrafiltration membrane. According to the invention, the membrane is prepared by adopting a phase inversion method, and pollutants in water are intercepted by the tea polyphenol-polyethersulfone ultrafiltration membrane by taking a static pressure difference as a driving force and a pore size screening theory as a filtering mechanism, so that the aim of primarily purifying water is fulfilled; the hydrophilicity of the polyethersulfone is improved, the permeation flux of the membrane is increased, and the retention rate is improved.

Description

Technical field [0001] The present invention relates to the preparation of ultrafiltration membranes, and more particularly to a polyether sulfone ultrafiltration membrane having a tea polyphenol and polyvinyl alcohol as an additive and a preparation method thereof. Background technique [0002] The ultrafiltration membrane has an important role in the purification, concentration, filtration, and separation of solutes in pharmaceutical, dairy products, biotechnology industrial and wastewater treatment. The ultrafiltration membrane is a pressure-driven film with a static pressure difference as a pressing force. Ultrafiltration technology has a relatively broad intercepting section (500-200000), the main principle of separation is the aperture screening theory, so the ultrafiltration can pass the material The molecular weight between the molecular weight is separated. It is now widely used as a polyamide, polyolefin, polyary ether, polyalbone, and other organic polymer materials su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D67/00B01D61/14C02F1/44
CPCB01D71/68B01D69/02B01D67/0002B01D61/145C02F1/444B01D2323/12B01D2325/36
Inventor 孙德刘浩天李冰冰葛彦侠王广增
Owner CHANGCHUN UNIV OF TECH