Oil-water separation net membrane as well as preparation method and application thereof

An oil-water separation omentum, oil-water separation technology, applied in the separation method, liquid separation, semi-permeable membrane separation, etc., can solve the problems of high cost, poor feasibility, cumbersome preparation process, etc., to prevent penetration, improve utilization efficiency, good The effect of hydrophilicity and lipophilicity

Active Publication Date: 2018-10-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN103111096B and the document Chemical Engineering Journal 322(2017):693-701 reported a method that can adjust the wettability of the omentum by changing conditions such as temperature and pH, but the feasibility in actual operation is poor
Chinese patent application CN107596735A reports that by growing titanium dioxide nanorods on the surface of a porous metal substrate, the material has both underwater super

Method used

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  • Oil-water separation net membrane as well as preparation method and application thereof
  • Oil-water separation net membrane as well as preparation method and application thereof
  • Oil-water separation net membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of preparation method of oil-water separation omentum, comprises the steps:

[0044] (1) Synthesizing a copolymer containing polyethylene glycol hydrophilic chain, dimethylaminoethyl hydrophobic chain and mussel biomimetic catechol group;

[0045] Synthetic route such as figure 1 As shown, in the first step, dimethylaminoethyl methacrylate (1.57g), poly(ethylene glycol) methacrylate (4.75g), pentafluorophenol acrylate (2.38g), RAFT reagent 2- (Dodecyltrithiocarbonate)-2-methylpropionic acid (0.40g) was dissolved in 30mL 1,4-dioxane, and stirred under nitrogen for 20min; adding the initiator azobisisobutyronitrile (0.04g), stirred for 10min under the protection of nitrogen to obtain the first reaction system; transferred the first reaction system to a 72°C oil bath and stirred for 3-4h to obtain the second reaction system; the second reaction system was rotary evaporated at 60°C After concentration, it was slowly dropped into n-hexane, and the product I was prec...

Embodiment 2

[0058] (1) Synthesizing a copolymer containing polyethylene glycol hydrophilic chain, dimethylaminoethyl hydrophobic chain and mussel biomimetic catechol group;

[0059] Synthetic route such as figure 1 As shown, in the first step, dimethylaminoethyl methacrylate (3.14g), poly(ethylene glycol) methacrylate (9.5g), pentafluorophenol acrylate (4.76g), RAFT reagent 2- (Dodecyltrithiocarbonate)-2-methylpropionic acid (0.20g) was dissolved in 60mL of 1,4-dioxane, and stirred for 20min under nitrogen protection; the initiator azobisiso Butyronitrile (0.02g), stirred for 10min with nitrogen gas to obtain the first reaction system; transferred the first reaction system to a 72°C oil bath and stirred for 3-4h to obtain the second reaction system; the second reaction system was rotary evaporated at 60°C After concentration, it was slowly dropped into n-hexane, and the product I was precipitated.

[0060] In the second step, the obtained product I was dissolved in 60 mL of dichlorometh...

Embodiment 3

[0070] (1) Synthesizing a copolymer containing polyethylene glycol hydrophilic chain, dimethylaminoethyl hydrophobic chain and mussel biomimetic catechol group;

[0071]In the first step, dimethylaminoethyl methacrylate (2.36g), poly(ethylene glycol) methacrylate (7.13g), pentafluorophenol acrylate (3.57g), RAFT reagent 2-(12 Alkyl trithiocarbonate group)-2-methylpropionic acid (0.40) was dissolved in 45mL1,4-dioxane, stirred for 20min under nitrogen protection; adding initiator azobisisobutyronitrile (0.04g ), stirred with nitrogen for 10 minutes to obtain the first reaction system; transferred the first reaction system to a 72°C oil bath and stirred for 3 to 4 hours to obtain the second reaction system; after the second reaction system was concentrated by rotary evaporation at 60°C, it was Slowly drop into n-hexane, the product I precipitates out.

[0072] In the second step, the obtained product I was dissolved in 45 mL of dichloromethane, added dopamine hydrochloride (5.7...

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Abstract

The invention discloses an oil-water separation net membrane as well as a preparation method and application thereof. The preparation method of the oil-water separation membrane comprises the steps ofsynthesizing a copolymer containing a polyethylene glycol hydrophilic chain, a dimethylaminoethyl hydrophobic chain, and a mussel biomimetic catechol group, and dissolving the copolymer in an aceticacid/ sodium acetate buffer solution; washing and drying the net membrane, immersing the net membrane in a dopamine-containing trihydroxymethyl aminomethane solution, taking out the net membrane, washing and drying, immersing the net membrane in the acetic acid/ sodium acetate buffer solution containing the copolymer, and washing and drying. The oil-water separation net membrane can be applied tooil-water separation. The oil-water separation net membrane contains a polymer modified with a hydrophilic and hydrophobic chain, has super-hydrophilic and super-oleophilic nature in air and super-olephobic nature under water/ super-hydrophobic nature under oil, belongs to a water removal and oil interception mode after being pre-wetted by water, belongs to an oil removal and water intercepting mode after being pre-wetted by oil, improves the utilization efficiency of the separation membrane, and has large processing capacity and high separation efficiency.

Description

technical field [0001] The invention relates to the field of polymer functional materials and surface modification of solid materials, in particular to an oil-water separation mesh and its preparation method and application. Background technique [0002] Frequent marine oil spills and a large amount of oily sewage produced in petrochemical, food, pharmaceutical, leather and other industrial productions enter water bodies, causing great harm to ecological balance and human health. In order to protect limited water resources and recover oil at the same time, effective oil-water separation of oily sewage is required. The separation method based on the difference in wettability of oil and water has become a research hotspot in the treatment of oily wastewater because it does not require the addition of chemical agents during the treatment process, is easy to operate, and has high separation efficiency. In actual operation, for different types of oily sewage, it may be necessary...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D69/02B01D67/00B01D17/022
CPCB01D17/02B01D67/0006B01D69/02B01D71/34B01D2325/36B01D2325/38
Inventor 李琳戴彩丽赵明伟孙永鹏吴一宁赵光
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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