A preparation method of an underwater superoleophobic oil-water separation membrane based on tannic acid modification

An oil-water separation mesh membrane, underwater superoleophobic technology, applied in separation methods, liquid separation, semi-permeable membrane separation and other directions, can solve the problems of cumbersome preparation process, high cost, unsuitable for industrial production and application, etc. Simple, easy to operate, low processing cost

Active Publication Date: 2021-05-25
刘云晖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of oil-water separation materials, there have been some literature and patent reports on superhydrophilic / underwater superoleophobic bionic functional surfaces based on dopamine surface modification, but there are still problems such as cumbersome preparation process, high cost, and unsuitability for industrial production and application.

Method used

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  • A preparation method of an underwater superoleophobic oil-water separation membrane based on tannic acid modification
  • A preparation method of an underwater superoleophobic oil-water separation membrane based on tannic acid modification
  • A preparation method of an underwater superoleophobic oil-water separation membrane based on tannic acid modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Clean the 400-mesh stainless steel mesh and dry it for later use.

[0030] (2) Dissolving tannic acid in water, adjusting the pH to 8.3, to obtain a tannic acid solution with a mass percentage of tannic acid of 3%; dissolving ferric chloride in water to obtain the mass percentage of iron ions It is a 1% iron ion solution; N,N-dimethyl-1,3-diaminopropane is dissolved in water, and the mass percentage of N-dimethyl-1,3-diaminopropane is 5% The tertiary amine modified solution of 1,3-propane sultone was dissolved in methanol to obtain a zwitterion modified solution with a mass percentage of 1,3-propane sultone of 2%.

[0031] (3) Soak the dried stainless steel mesh in tannic acid solution, soak it for 10 seconds, take it out to dry; then soak it in iron ion solution, soak it for 5 seconds, take it out and dry it; repeat this process 6 times; After taking out, it is dried in a drying oven at 80°C for 6 hours to obtain a tannic acid modified fabric web;

[0032] (4) Im...

Embodiment 2

[0036] (1) Clean the 300-mesh stainless steel mesh and dry it for later use.

[0037] (2) Dissolving tannic acid in water, adjusting the pH to 8, to obtain a tannic acid solution with a mass percentage of tannic acid of 4%; dissolving ferric chloride in water to obtain the mass percentage of iron ions It is a 0.5% iron ion solution; N,N-dimethyl-1,3-diaminopropane is dissolved in ethanol, and the mass percentage of N-dimethyl-1,3-diaminopropane obtained is 2 % tertiary amine modification solution; dissolve 1,3-propane sultone in ethanol to obtain a zwitterion modified solution with a mass percentage of 1,3-propane sultone of 2%.

[0038] (3) Soak the dried stainless steel mesh in tannic acid solution, soak it for 1 hour, then take it out to dry; then soak it in iron ion solution, soak it for 20 seconds, then take it out to dry; this process is repeated 4 times; After taking out, it is dried in a drying oven at 60°C for 6 hours to obtain a tannic acid-modified fabric web;

[...

Embodiment 3

[0042] (1) Clean the 100-mesh copper mesh and dry it for later use.

[0043] (2) Dissolving tannic acid in ethanol, adjusting the pH to 9.0 to obtain a tannic acid solution with a mass percentage of tannic acid of 0.1%; dissolving ferric chloride in ethanol to obtain a mass percentage of iron ions Iron ion solution with a content of 0.01%; Dissolve N,N-dimethyl-1,3-diaminopropane in ethanol to obtain the mass percentage of N-dimethyl-1,3-diaminopropane 0.01% tertiary amine modification solution; dissolving γ-butyrolactone in ethanol to obtain a zwitterion modification solution with a mass percentage of γ-butyrolactone of 0.01%.

[0044] (3) Soak the dried copper mesh in the tannic acid solution, soak for 30 seconds, take it out and dry it; then soak it in the iron ion solution, soak it for 30 seconds, take it out and dry it; repeat this process 15 times; After taking it out, dry it in a drying oven at 50°C for 0.5 hour to obtain a tannic acid modified fabric net;

[0045] (4...

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Abstract

The invention discloses a preparation method of an underwater super-oleophobic oil-water separation membrane based on tannic acid modification. The preparation method uses tannic acid to modify the surface of the omentum material, and then connects the biomimetic zwitterionic compound substance on the surface of the omentum material through the reaction with the catechol group of tannic acid and its derivative group, so as to realize super The preparation of the hydrophilic / underwater superoleophobic oil-water separation omentum has a simple preparation process and low preparation cost, and is suitable for industrial production. The raw materials of the present invention are easy to obtain and have wide sources. The prepared super-hydrophobic and super-oleophilic oil-water separation mesh has good selective permeation to water, low processing cost, simple and convenient operation, and can be recycled for many times.

Description

technical field [0001] The invention relates to a preparation method of an oil-water separation omentum, in particular to a preparation method of an underwater superoleophobic oil-water separation omentum based on tannic acid modification. Background technique [0002] With the massive discharge of oily sewage in production and life and the frequent occurrence of crude oil spills at sea, oil pollution in water has become a major problem endangering human health and environmental safety. In order to maintain a good ecological environment and human health, and protect limited water resources, the effective separation of oily sewage has become an urgent problem to be solved. At present, there are many methods for treating water pollution caused by the leakage of toxic organic solvents or petroleum products. Traditional oil-water separation methods include gravity separation, oil skimming, centrifugation and flotation, etc., which have good effects on oil-water separation, but a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/06B01D69/02B01D67/00B01D17/022
CPCB01D17/085B01D67/0079B01D69/02B01D71/06B01D2325/38
Inventor 彭新艳刘云鸿刘云晖
Owner 刘云晖
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