Oily sewage separation membrane with flower-like structure, and preparation method thereof

A flower-like structure, oily water technology, applied in the separation method, immiscible liquid separation, liquid separation, etc., can solve the problems of high porosity of specific surface area and so on

Inactive Publication Date: 2020-04-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal-organic framework compounds have the advantages of ultra-high specific surface area, high porosity, regular pore channels, and adjustable pore size. However, they are rarely used in the separation of oily wastewater.

Method used

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  • Oily sewage separation membrane with flower-like structure, and preparation method thereof
  • Oily sewage separation membrane with flower-like structure, and preparation method thereof
  • Oily sewage separation membrane with flower-like structure, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1, 0.526 g of polyacrylonitrile and 0.263 g of polyethyleneimine were weighed and added to 5 ml of dimethylformamide solution, and magnetically stirred at room temperature for 12 hours to obtain a polyacrylonitrile / polyethyleneimine precursor solution. Draw the polyacrylonitrile / polyethyleneimine precursor solution with a 5 ml syringe, and install a No. 21 needle; put the syringe into the syringe pump of the electrospinning equipment; adjust the advance speed of the syringe pump to 1 ml per hour; Set the translation distance to 10 cm; adjust the distance from the needle to the receiver to 12 cm; cover the roller receiver with a layer of tinfoil, and adjust the receiver rotation speed to 60 rpm; connect the positive high voltage of the high voltage power supply to the syringe Needle, adjust the voltage to 12 kV; connect the negative high voltage of the high-voltage power supply to the roller receiver, adjust the voltage to -2 kV; start the syringe pump system, and...

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Abstract

The invention relates to an oily sewage separation membrane with a flower-like structure, and a preparation method thereof. According to the preparation method, a fiber membrane with a filament diameter of about 500 nm and extremely high porosity is prepared by using polyacrylonitrile and polyethyleneimine as raw materials through an electrostatic spinning technology; an MIL-53-OH metal organic framework compound with a flower-like structure grows on the surface of the fiber membrane through a hydrothermal synthesis method; by using the adsorption effect of the amino on the polyethyleneimine chain and the hydroxyl and the carboxyl on the MIL-53-OH to water, and the synergistic effect of the MIL-53-OH nanoflower-like structure, the efficient separation of oil-water emulsion and an organic dye is achieved, wherein the separation flux (4260 L / m<2>.h) achieves ten times the separation flux of the traditional commercial separation membrane, and the separated water can achieve the national sewage discharge standard; and the fiber membrane has excellent acid resistance and excellent alkali resistance, and has good application prospect in actual industrial production.

Description

technical field [0001] The invention relates to an oil-water separation material, in particular to an oily sewage separation membrane with a flower-like structure and a preparation method thereof, belonging to the technical field of new materials. Background technique [0002] During the exploitation, transportation and use of oil products and people's daily life, a large amount of oily sewage is often produced. According to preliminary statistics, the global discharge of oily sewage reached 10 billion tons in 2012, and it is still rising year by year. Oily sewage has high chemical oxygen consumption and is directly discharged into the environment, causing serious pollution to soil, rivers and oceans. In addition, rapid population and economic growth has led to an ever-increasing demand for clean water. Therefore, it is of great significance to treat oily sewage quickly and efficiently. [0003] Membrane separation technology has the advantages of low energy consumption, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022
CPCB01D17/02
Inventor 祝磊李晖薛庆忠李小芳朱旭马超尹莹莹
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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