Preparation method of underwater super-oleophobic oil-water separation mesh membrane based on tannic acid modification

A technology of oil-water separation omentum and underwater super-oleophobic, applied in separation methods, liquid separation, semi-permeable membrane separation, etc., can solve the problems of unsuitable for industrial production and application, high cost, cumbersome preparation process, etc., to achieve the best choice Sexual penetration, easy operation, and simple preparation process

Active Publication Date: 2019-04-26
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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  • Preparation method of underwater super-oleophobic oil-water separation mesh membrane based on tannic acid modification
  • Preparation method of underwater super-oleophobic oil-water separation mesh membrane based on tannic acid modification
  • Preparation method of underwater super-oleophobic oil-water separation mesh 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 a mass percentage of iron ions It is a 1% iron ion solution; dissolving N,N-dimethyl-1,3-diaminopropane in water to obtain 5% by mass of N-dimethyl-1,3-diaminopropane tertiary amine modification solution; 1,3-propane sultone was dissolved in methanol to obtain a zwitterionic modification solution with a mass percentage of 1,3-propane sultone of 2%.

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

[0032] (4) Soak t...

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 a mass percentage of iron ions 0.5% iron ion solution; dissolving N,N-dimethyl-1,3-diaminopropane in ethanol to obtain N-dimethyl-1,3-diaminopropane with a mass percentage of 2 % tertiary amine modification solution; 1,3-propane sultone was dissolved in ethanol to obtain a zwitterionic modification solution with a mass percentage of 1,3-propane sultone of 2%.

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

[0039] (4) ...

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 mesh membrane based on tannic acid modification. The preparation method utilizes tannic acid to modify a surface of a mesh membrane material, and attaches a bionic zwitterionic compound substance to the surface of the mesh membrane material by reaction with a catechol group of tannic acid and a derivative group thereof, thereby preparing the super-hydrophilic / underwater super-oleophobic oil-water separation mesh membrane. The preparation method is simple in preparation process, low in preparation cost, suitable for industrial production, easily available in raw material and extensive in source of the raw materials; and the prepared superhydrophobic and super-lipophilic oil-water separation mesh membrane has relatively good selective permeation for water, low treatment cost, simple operation, recyclability and usability for multiple times.

Description

technical field [0001] The invention relates to a preparation method of an oil-water separation membrane, in particular to a preparation method of an underwater super-oleophobic oil-water separation membrane based on tannic acid modification. Background technique [0002] With the massive discharge of oily sewage in production and life and the frequent occurrence of oil spill accidents at sea, oil pollution in water has become a major problem that endangers 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 ways to control water pollution caused by toxic organic solvents or leakage of petroleum products. Traditional oil-water separation methods include gravity separation, oil skimming, centrifugation, and flotation, etc., which have a good effect on oil-water separation, but...

Claims

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Application Information

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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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