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Preparation method of super-hydrophilic/underwater super-oleophobic separation membrane

An underwater super-oleophobic and super-hydrophilic technology, which is applied in osmosis/dialysis water/sewage treatment, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problem of low water flux, short service life and complicated preparation process and other problems, to achieve the effect of high separation efficiency, no toxic and harmful substances, and cheap and easy-to-obtain raw materials

Pending Publication Date: 2021-12-31
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the chemical instability, poor mechanical properties, short service life and low flux of organic materials such as polymer membranes and cotton fabrics, it is difficult to apply them for oil-water separation for a long time. However, there are problems such as low mechanical strength of the membrane material, complicated preparation process, high cost, and low water flux. Therefore, it is necessary to develop a mechanically stable and high-flux oil-water separation membrane.

Method used

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  • Preparation method of super-hydrophilic/underwater super-oleophobic separation membrane
  • Preparation method of super-hydrophilic/underwater super-oleophobic separation membrane
  • Preparation method of super-hydrophilic/underwater super-oleophobic separation membrane

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Embodiment 1

[0031] Embodiment one: if Figure 1-4 Shown, a kind of preparation method of superhydrophilic / underwater superoleophobic separation membrane comprises the steps:

[0032] (1) The 300-mesh stainless steel mesh was ultrasonically cleaned with acetone, ethanol, and deionized water for 20 minutes, and then dried to obtain the first basal omentum;

[0033] (2) Immerse the first basal omentum in an aqueous solution (40ml) of ammonium fluotitanate (0.9892g) and boric acid (0.617g), react at a constant temperature at 30°C for 10h in a water bath, take it out and use a deionized After washing with water, the second basal omentum was obtained after drying in air;

[0034] (3) Put the second basal omentum into a muffle furnace for heating and calcining, the heating rate is 2°C / min, the terminal temperature is 400°C, and the holding time is 2h. After the calcination is finished, take out the third base omentum supported by titania;

[0035] (4) Soak the third basal omentum in 20 ml of ...

Embodiment 2

[0037] Embodiment two: a kind of preparation method of superhydrophilic / underwater superoleophobic separation membrane comprises the following steps:

[0038] (1) The 300-mesh stainless steel mesh was ultrasonically cleaned with acetone, ethanol, and deionized water for 20 minutes, and then dried to obtain the first basal omentum;

[0039] (2) Immerse the first basal omentum in an aqueous solution (40ml) of ammonium fluotitanate (0.988g) and boric acid (0.625g), react at a constant temperature at 30°C for 10h in a water bath, take it out and use a deionized After washing with water, the second basal omentum was obtained after drying in air;

[0040] (3) The second basal omentum is put into a muffle furnace for calcination, the program is set to a heating rate of 2°C / min, a terminal temperature of 400°C, and a holding time of 2h. After the calcination is finished, take out the third base omentum supported by titania;

[0041] (4) Soak the third basal omentum in 20 ml of 3vol%...

Embodiment 3

[0043]Embodiment three: a kind of preparation method of superhydrophilic / underwater superoleophobic separation membrane comprises the following steps:

[0044] (1) The 200-mesh stainless steel mesh was ultrasonically cleaned with acetone, ethanol, and deionized water for 20 minutes, and then dried to obtain the first basal omentum;

[0045] (2) Immerse the first basal omentum in an aqueous solution (40ml) of ammonium fluotitanate (0.9895g) and boric acid (0.613g), react at a constant temperature at 30°C for 10h in a water bath, take it out and use a deionized After washing with water, the second basal omentum was obtained after drying in air;

[0046] (3) The second basal omentum is put into a muffle furnace for calcination, the program is set to a heating rate of 2°C / min, a terminal temperature of 400°C, and a holding time of 2h. After the calcination is finished, take out the third base omentum supported by titania;

[0047] (4) Soak the third basal omentum in 20ml of 3vol...

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Abstract

The invention discloses a preparation method of a super-hydrophilic / underwater super-oleophobic separation membrane. The preparation method comprises the steps: firstly depositing a layer of rough titanium dioxide on a base membrane, then introducing a reaction functional group on the surface of the base membrane by using a surfactant, finally grafting a hydrophilic polymer on the surface of the base membrane by using a solution polymerization method, and thus obtaining the super-hydrophilic / underwater super-oleophobic separation membrane. The super-hydrophilic / underwater super-oleophobic separation membrane disclosed by the invention can be applied to oil-water separation. The super-hydrophilic / underwater super-oleophobic separation membrane disclosed by the invention has super-hydrophilic properties in air and underwater super-oleophobic properties, oil can be intercepted on the separation membrane after the separation membrane is wetted by water, the water can quickly pass through meshes, and the separation membrane is large in flux and high in efficiency.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials and oil-water separation, and in particular relates to a preparation method of a superhydrophilic / underwater superoleophobic separation membrane. Background technique [0002] In recent years, industrial fields such as mining, textile, food, petrochemical and metal smelting have produced a large amount of oily wastewater, as well as frequent oil spills, resulting in serious environmental pollution and ecosystem damage. In order to protect limited water resources and recover oil, effective oil-water separation of oily wastewater is required. Oil-water separation membranes with special wettability are environmentally friendly, cost-effective, and easy to prepare, and are a solution to the above problems. Separation membranes in oil-water separation materials with special wettability can be divided into superhydrophilic membranes and superoleophilic membranes according to the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00C02F1/44C08F292/00C08F220/54
CPCB01D69/12B01D67/0079C02F1/44C08F292/00B01D2325/36B01D2325/24C08F220/54
Inventor 胡杰王佳伟周学军叶铨斌
Owner JIANGSU UNIV
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