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Preparation method of novel super-oleophylic and super-hydrophobic separation membrane

A separation membrane and super-lipophilic technology, applied in separation methods, liquid separation, semi-permeable membrane separation, etc., to achieve the effects of easy amplification, high integration, and improved lipophilicity and hydrophobicity

Inactive Publication Date: 2016-07-13
WUXI LVZHIXING ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing treatment methods for oily wastewater and watery sewage oil have their own advantages and disadvantages, and it is imperative to develop new and efficient treatment methods

Method used

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  • Preparation method of novel super-oleophylic and super-hydrophobic separation membrane
  • Preparation method of novel super-oleophylic and super-hydrophobic separation membrane
  • Preparation method of novel super-oleophylic and super-hydrophobic separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 150 g of hexafluorobutyl acrylate and 250 g of hexafluorobutyl methacrylate, add 0.4 g of azobisisobutyronitrile, add 200 g of toluene, and pass nitrogen gas for 30 minutes, then heat the reaction at 70°C for 5 hours. Take it out, deposit it in deionized water, and dry it in vacuum to obtain a hydrophobically modified polymer.

[0029] The hydrophobically modified polymer was dissolved in tetrahydrofuran to prepare a 5% hydrophobically modified solution. Take a flat polypropylene separation membrane with a separation pore diameter of 10 μm, soak the separation membrane in the hydrophobic modification solution for 20 minutes, take it out, dry it, and repeat the process 3 times. A hydrophobically modified polypropylene separation membrane is obtained. The water contact angle of the hydrophobically modified membrane was 155°, and the oil contact angle was 0°.

[0030] The aqueous crude product is taken for filtration. The filtration pressure is 0.2MPa, and the wate...

Embodiment 2

[0032] Take 350 g of 2,2,2-trifluoroethyl methacrylate and 250 g of dodecafluoroheptyl methacrylate, add 0.5 g of azobisisoheptanonitrile, add 400 g of dimethyl phthalate, and pass in nitrogen gas 30min, then heated for reaction at 75°C, reacted for 4.5h, took it out, deposited it in deionized water, and dried it in vacuum to obtain a hydrophobically modified polymer.

[0033] The hydrophobically modified polymer was dissolved in chloroform to make a 5% hydrophobically modified solution. Take a flat polyacrylonitrile separation membrane with a separation pore diameter of 20 μm, soak the separation membrane in the hydrophobic modification solution for 20 minutes, take it out, dry it, and repeat it twice. A hydrophobically modified polypropylene separation membrane is obtained. The water contact angle of the hydrophobically modified membrane was 150°, and the oil contact angle was 0°.

[0034] The aqueous crude product is taken for filtration. The filtration pressure is 0.2MP...

Embodiment 3

[0036] Take 350g of dodecafluoroheptyl acrylate and 250g of styrene respectively, add 0.5g of azobisisoheptanonitrile, add 400g of dimethyl phthalate, pass nitrogen gas for 30min, and then heat the reaction, the heating temperature is 75°C, the reaction After 10 hours, it was taken out, deposited in deionized water, and vacuum-dried to obtain a hydrophobically modified polymer.

[0037] The hydrophobically modified polymer was dissolved in chloroform to make a 5% hydrophobically modified solution. Take a flat polysulfone separation membrane with a separation pore diameter of 0.5 μm, soak the separation membrane in the hydrophobic modification solution for 20 minutes, take it out, dry it, and repeat the process 3 times. A hydrophobically modified polypropylene separation membrane is obtained. The water contact angle of the hydrophobically modified membrane was 157°, and the oil contact angle was 0°.

[0038] The aqueous crude product is taken for filtration. The filtration p...

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Abstract

The invention relates to a preparation method of a novel super-oleophylic and super-hydrophobic separation membrane. The preparation method comprises steps as follows: (1) hydrophobic monomers are polymerized through free radical polymerization, precipitated in water and subjected to vacuum drying, and a hydrophobic modified polymer is obtained; (2) the hydrophobic modified polymer is dissolved in a solvent I, and a modified solution is obtained; (3) the modified solution is applied to the surface of a separation membrane and inner sides of membrane pores, and a hydrophobic membrane surface is obtained after the solvent is evaporated. The preparation method is simple and facilitates industrial production and amplification, and the separation membrane has great oil and water separation performance.

Description

technical field [0001] The invention relates to a preparation method of a separation membrane, in particular to a method for preparing a hydrophobic polymer separation membrane by surface modification. Background technique [0002] Water and oil are incomparably precious natural resources. Water is the source of life, human beings depend on it for survival and it is non-renewable. "Oil" is a general term for liquids that are immiscible with water at room temperature, and generally refers to vegetable oils, animal oils, mineral oils and essential oils used in our lives. Oil is an important chemical raw material and the main source of energy for vehicles, airplanes and other tools. It can be said that water is the guarantee of human life, and oil is the cornerstone of human civilization. [0003] At present, common dirty oil includes lubricating oil and mechanical oil pollution during mechanical processing; oil production fluid and produced water produced in oil and gas exp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D67/00B01D63/14B01D17/022B01D69/02
CPCB01D71/82B01D17/02B01D63/14B01D67/0006B01D69/02B01D2325/38
Inventor 汤荣南
Owner WUXI LVZHIXING ENVIRONMENTAL PROTECTION CO LTD
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