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A kind of oil-water separation omentum and its preparation method and application

A technology for oil-water separation omentum and oil-water separation, applied in separation methods, liquid separation, semi-permeable membrane separation, etc., can solve the problems of poor feasibility, high cost, cumbersome preparation process, etc., and achieve improved utilization efficiency, good hydrophilic Oily, anti-penetration effect

Active Publication Date: 2020-10-09
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-oleophobic properties and super-hydrophobic properties under oil, but the fine structure of nanorods is easily destroyed, and the practical application performance is limited.
CN107893218A reports a composite film of titanium dioxide / sulfonated graphene oxide / silver nanoparticles, which has the properties of super-oleophobic underwater and super-hydrophobic under oil, but its preparation process is very cumbersome and costly

Method used

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  • A kind of oil-water separation omentum and its preparation method and application
  • A kind of oil-water separation omentum and its preparation method and application
  • A kind of oil-water separation omentum and its preparation method and application

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Embodiment 1

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

[0044] (1) Synthesis of copolymers containing polyethylene glycol hydrophilic chains, dimethylaminoethyl hydrophobic chains and mussel biomimetic catechol groups;

[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, stirred for 20min under nitrogen gas; adding the initiator azobisisobutyronitrile (0.04g), stirred for 10 min 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 3-4 h to obtain the second reaction system; the second reaction system was spun at 60 °C After evaporation and concentration, it was slowly dropped into n-hexane, and the product I...

Embodiment 2

[0058] (1) Synthesis of copolymers containing polyethylene glycol hydrophilic chains, dimethylaminoethyl hydrophobic chains and mussel biomimetic catechol groups;

[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 60 mL of 1,4-dioxane, stirred for 20min under nitrogen protection; the initiator azobis Isobutyronitrile (0.02g), stirred with nitrogen gas for 10min 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 spun at 60°C After evaporation and concentration, it was slowly dropped into n-hexane, and the product I was precipitated.

[0060] In the second step, dissolve the obtained product I in 60 mL of dichloromethane...

Embodiment 3

[0070] (1) Synthesis of copolymers containing polyethylene glycol hydrophilic chains, dimethylaminoethyl hydrophobic chains and mussel biomimetic catechol groups;

[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 45 mL 1,4-dioxane, stirred for 20 min under nitrogen protection; adding initiator azobisisobutyronitrile ( 0.04g), stirred with nitrogen for 10 min to obtain the first reaction system; transferred the first reaction system to a 72°C oil bath and stirred for 3-4 h to obtain the second reaction system; the second reaction system was concentrated by rotary evaporation at 60°C Afterwards, it was slowly dropped into n-hexane, and the product I was precipitated.

[0072] In the second step, dissolve the obtained product I in 45mL of dichloromethane, add dopamine hydrochloride (5.70g...

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Abstract

The invention discloses an oil-water separation omentum, a preparation method and application thereof. The preparation method of the oil-water separation omentum is by synthesizing a copolymer containing polyethylene glycol hydrophilic chain, dimethylaminoethyl hydrophobic chain and mussel bionic catechol group, and dissolving the copolymer in acetic acid / In sodium acetate buffer solution; wash and dry the omentum, soak in tris solution containing dopamine, take out the omentum, wash and dry, soak in acetic acid / sodium acetate buffer solution containing copolymer, wash and dry Instantly. The oil-water separation mesh of the present invention can be applied to oil-water separation. The oil-water separation membrane of the present invention is modified by polymers containing hydrophilic and hydrophobic chains at the same time. It has the properties of superhydrophilic and superoleophilic in the air, and superoleophobic under water / superhydrophobic under oil. The water cut-off mode, after being pre-wetted by oil, belongs to the oil removal and water cut-off mode, which improves the utilization efficiency of the separation membrane, with 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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Patent Type & Authority Patents(China)
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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