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Preparation method of super-hydrophilic/underwater super-oleophobic visible-light-driven anti-fouling membrane

An underwater superoleophobic and visible light technology, which can be used in osmotic/dialysis water/sewage treatment, separation methods, chemical instruments and methods, etc., and can solve the problems of reducing the service life of membrane materials, reducing separation efficiency, and pore blocking and hydrophobicity. , to achieve the effect of stable performance, high separation efficiency and strong antifouling

Inactive Publication Date: 2019-04-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these superhydrophobic materials are not suitable for separating water-rich oil-water mixtures due to their lipophilicity, which can easily cause pore clogging and decrease in hydrophobicity, thereby reducing the service life of membrane materials; currently, in superhydrophilic / underwater superhydrophobic materials Rapid development has been made in oil-water separation. Existing literature studies have reported PVDF membranes, sponges, and stainless steel mesh membranes modified by hydrophilic substances. These materials allow water to pass through while repelling oil on the membrane surface, thereby Effectively prevent the membrane from being polluted by oil; however, there are still many deficiencies, because a small amount of oil is still attached to the surface of the membrane during the oil-water separation process, resulting in reduced separation efficiency and reduced flux

Method used

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  • Preparation method of super-hydrophilic/underwater super-oleophobic visible-light-driven anti-fouling membrane
  • Preparation method of super-hydrophilic/underwater super-oleophobic visible-light-driven anti-fouling membrane
  • Preparation method of super-hydrophilic/underwater super-oleophobic visible-light-driven anti-fouling membrane

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Effect test

Embodiment 1

[0029] (1) First, disperse 20mL of N,N-dimethylformamide in 20mL of isopropanol and stir for 15min, then add 1mL of tetratintrum titanate, stir for 15min, then add 16mg of cobalt chloride hexahydrate, get mixed solution;

[0030] (2) Move the mixed solution to a polytetrafluoroethylene reactor, add carbon cloth, the area of ​​the carbon cloth is 2.5cm x 3cm, heat the reaction, the temperature is 180°C, and the time is 18h. After cooling to room temperature naturally, take out the carbon cloth The composite was rinsed with deionized water, and dried in an oven at 60° C. for 12 hours to obtain a superhydrophilic / underwater superoleophobic visible light-driven antifouling film.

Embodiment 2

[0032] (1) First, disperse 10mL of N,N-dimethylformamide in 30mL of isopropanol and stir for 15min, then add 2mL of tetratintrum titanate, stir for 15min, then add 32mg of cobalt chloride hexahydrate, get mixed solution;

[0033] (2) Move the mixed solution to a polytetrafluoroethylene reaction kettle, add carbon cloth, the area of ​​the carbon cloth is 2.5cm x 3cm, heat the reaction, the temperature is 200°C, and the time is 20h. After cooling to room temperature naturally, take out the carbon cloth The composite was rinsed with deionized water, and dried in an oven at 60° C. for 12 hours to obtain a superhydrophilic / underwater superoleophobic visible light-driven antifouling film.

Embodiment 3

[0035] (1) First, disperse 30mL of N,N-dimethylformamide in 40mL of isopropanol and stir for 15min, then add 3mL of tetratintrum titanate, stir for 15min, then add 48mg of cobalt chloride hexahydrate, get mixed solution;

[0036] (2) Move the mixed solution to a polytetrafluoroethylene reaction kettle, add carbon cloth, the area of ​​the carbon cloth is 2.5cm x 3cm, heat the reaction, the temperature is 220°C, and the time is 22h. After cooling to room temperature naturally, take out the carbon cloth The composite was rinsed with deionized water, and dried in an oven at 60° C. for 12 hours to obtain a superhydrophilic / underwater superoleophobic visible light-driven antifouling film.

[0037] 2, the present invention will be further described below in conjunction with specific implementation examples:

[0038] In the present invention, the separation performance evaluation of the specific embodiment is carried out according to the following method: first, the prepared membrane...

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Abstract

The invention belongs to the technical field of environmental functional materials, and particularly relates to a preparation method of a super-hydrophilic / underwater super-oleophobic visible-light-driven anti-fouling membrane. The preparation method specifically comprises the following steps: firstly, dispersing N, N-dimethylformamide in isopropanol; adding tetrabutyl titanate; stirring and thenadding cobalt chloride hexahydrate; stirring to obtain a mixed solution; then, immersing carbon cloth in the mixed solution; transferring the mixed solution to a polytetrafluoroethylene reaction kettle for heating reaction; naturally cooling to room temperature after the reaction is finished; and washing and drying to obtain the super-hydrophilic / underwater super-oleophobic visible-light-driven anti-fouling membrane. The super-hydrophilic / underwater super-oleophobic visible-light-driven anti-fouling membrane prepared in the invention has high separation efficiency which is up to 99% or more, stable performance, strong fouling resistance and excellent regeneration performance.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials, and in particular relates to a preparation method of a superhydrophilic / underwater superoleophobic visible light-driven antifouling film. Background technique [0002] With the continuous occurrence of frequent oil spills and the continuous discharge of oily industrial wastewater, a serious ecological crisis has been caused. A large amount of oily sewage enters the water environment, which not only seriously pollutes precious water resources, but also causes huge economic losses and affects social development. Therefore, finding an effective method for treating oily wastewater has become a top priority. Traditional oil-water separation methods include biological methods, adsorption methods and ultrasonic methods, but due to their low separation efficiency, difficult operation, and complicated separation process, the effect of separating oil-water mixtures is not ideal....

Claims

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Application Information

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IPC IPC(8): B01D69/02B01D71/02B01D67/00C02F1/44B01D17/022
CPCB01D17/02B01D67/0044B01D69/02B01D71/021B01D2325/36C02F1/44
Inventor 陈阳阳谢阿田戴江栋崔久云郎集会李春香闫永胜
Owner JIANGSU UNIV
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