Preparation method of super hydrophilic/underwater super oleophobic self-cleaning paper towel fibrous membrane

An underwater super-oleophobic and self-cleaning technology, applied in separation methods, chemical instruments and methods, immiscible liquid separation, etc., can solve the problem that the surface is easily polluted or blocked by oil, cannot be recycled multiple times, and shortens the service life and other problems, to achieve good anti-fouling and recycling performance, excellent regenerative ability, and strong anti-fouling effect

Active Publication Date: 2019-01-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of superhydrophobic and superoleophilic materials is easily polluted or blocked by oil, or even damaged by oil, so they cannot be recycled many times.
In view of the above, superhydrophilic / underwater superoleophobic materials have been widely used in oil-water separation, including PVDF membranes modified by hydrophilic substances, sponges, stainless steel mesh, etc. The surface of these membrane materials allows Water passes through to repel oil, which can effectively prevent oil pollution; but on the other hand, although these superhydrophilic / underwater superoleophobic materials have antifouling properties, they have the disadvantages of high cost and high toxicity, which limits their Applications
At the same time, in the long-term oil-water separation process, the surface of the membrane will inevitably be polluted by a small amount of oil and the service life will be shortened

Method used

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  • Preparation method of super hydrophilic/underwater super oleophobic self-cleaning paper towel fibrous membrane
  • Preparation method of super hydrophilic/underwater super oleophobic self-cleaning paper towel fibrous membrane
  • Preparation method of super hydrophilic/underwater super oleophobic self-cleaning paper towel fibrous membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) First, disperse 3g of P-25 powder in 100mL of 10M NaOH solution, stir for 10min, then transfer the mixed solution to a polytetrafluoroethylene reactor and heat it in an oven for 18h. After naturally cooling to room temperature, the collected product was washed with deionized water to neutrality, immersed in 50mL, 0.1M nitric acid solution, and dried to obtain titanic acid; finally, the titanic acid was heat-treated in air at a temperature of 500°C, The heating rate is 5°C / min, and the maintenance time is 3h to obtain TiO 2 Nanowires.

[0033] (2) First, 0.06g of TiO 2 Nanowires were dispersed in 50mL deionized water, ultrasonicated for 10min, and stirred for 30min to form a suspension; at the same time, 0.5g of paper towel was added to 50mL of deionized water, stirred for 30min, and then the paper towel dispersion was poured into TiO 2 In the suspension, 0.1211g of tris(hydroxymethyl)aminomethane and 0.2g of dopamine were added to the mixture at the same time, sti...

Embodiment 2

[0035] (1) First, disperse 3g of P-25 powder in 100mL of 10M NaOH solution, stir for 10min, then transfer the mixed solution to a polytetrafluoroethylene reactor and heat it in an oven for 20h, then cool it naturally After reaching room temperature, the collected product was washed with deionized water until neutral; immersed in 100mL, 0.1M nitric acid solution to obtain titanic acid; finally, the titanic acid was heat-treated in air at a temperature of 500°C and a heating rate of 5 ℃ / min, hold time is 3h, obtain TiO 2 Nanowires.

[0036] (2) 0.04g of TiO 2 Nanowires were dispersed in 50mL deionized water, sonicated for 10min, stirred for 30min to form a suspension; at the same time, 0.3g of paper towel was added to 50mL of deionized water, stirred for 30min, and then the paper towel dispersion was poured into TiO 2 In the suspension, 0.1211g of tris(hydroxymethyl)aminomethane and 0.2g of dopamine were added to the mixture at the same time, stirred for 6h, vacuum filtered, a...

Embodiment 3

[0038] (1) First, disperse 3g of P-25 powder in 100mL of NaOH solution with a concentration of 10M, stir for 10min, then transfer the mixed solution to a polytetrafluoroethylene reactor and heat it in an oven for 22h; After cooling to room temperature, the collected product was washed with deionized water until neutral, and then the sample was immersed in 150 mL of 0.1M nitric acid to obtain titanic acid; finally, the titanic acid was heat-treated in air at 500 °C, and the temperature was raised to The rate is 5°C / min, and the maintenance time is 3h to obtain TiO 2 Nanowires.

[0039](2) 0.02g of TiO 2 The nanowires were dispersed in 50mL deionized water for 10min and stirred for 30min to form a suspension. At the same time, 0.1g paper towel was added to 50mL deionized water and stirred for 30min. Then, the paper towel dispersion was poured into TiO 2 In the suspension, 0.1211g tris(hydroxymethyl)aminomethane and 0.2g dopamine were added to the mixture and stirred for 3 hour...

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PUM

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Abstract

The invention belongs to the technical field of environmental functional material preparation, and specifically relates to a preparation method of a super hydrophilic / underwater super oleophobic self-cleaning paper towel fibrous membrane. The preparation method specifically comprises the following steps: firstly, preparing titanium dioxide nanowires, adding the titanium dioxide nanowires to deionized water, and performing ultrasonic treatment and stirring to form a titanium dioxide suspension; and then adding paper towel to deionized water, performing stirring to form dispersion liquid, addingthe dispersion liquid to the titanium dioxide suspension, then adding tris(hydroxymethyl)aminomethane and dopamine, and performing stirring, vacuum suction filtration and vacuum drying to obtain theself-cleaning paper towel fibrous membrane. The prepared self-cleaning paper towel fibrous membrane has structural stability, high separation efficiency, dirt resistance and high reproducibility. Theused precursor material is the paper towel which has rich sources and low price; and a preparation process is simple, economic, environment-friendly and broad in application prospects.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental functional materials, and in particular relates to a preparation method of a superhydrophilic / underwater superoleophobic self-cleaning paper towel fiber film. Background technique [0002] The ever-increasing oil spills and the production of industrial oily wastewater have caused serious ecological crises. If oil floats on the water surface, it will spread rapidly to form an airtight oil film, which will hinder the reoxygenation of the water body, resulting in the lack of oxygen in the water body and affecting the planktonic environment. Biological growth destroys the ecological balance; moreover, non-decomposable waste oil may also produce other toxic substances, further polluting the ecological environment and affecting human safety. Traditional oily wastewater treatment methods mainly include centrifugation, sedimentation, filtration and flotation, but due to low separation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022
CPCB01D17/02
Inventor 陈阳阳谢阿田戴江栋崔久云李春香闫永胜
Owner JIANGSU UNIV
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