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Preparation method of superhydrophobic and super-lipophilic oil-water separation mesh membrane based on tannic acid modification

A technology for oil-water separation of omentum and tannic acid, applied in the direction of separation methods, liquid separation, semipermeable membrane separation, etc., can solve the problems of high cost, cumbersome preparation process, unsuitable for industrial production and application, and achieve simple operation and preparation The process is simple and avoids the effect of the surface microstructure construction 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, there have been many literature and patent reports on superhydrophobic and superoleophilic 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 superhydrophobic and super-lipophilic oil-water separation mesh membrane based on tannic acid modification
  • Preparation method of superhydrophobic and super-lipophilic oil-water separation mesh membrane based on tannic acid modification
  • Preparation method of superhydrophobic and super-lipophilic oil-water separation mesh membrane based on tannic acid modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Clean the 400-mesh stainless steel mesh and dry it for later use.

[0029] (2) Dissolving tannic acid in water, adjusting the pH to 8.5 to obtain a tannic acid solution with a mass percentage of tannic acid of 5%; dissolving ferric chloride in water to obtain a mass percentage of iron ions Be 1% iron ion solution; Cetylamine is dissolved in ethanol to obtain a long-chain alkylamine solution whose mass percentage of cetylamine is 8%;

[0030] (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 10 seconds, take it out and dry it; repeat this process twice; After taking it out, it was dried in a drying oven at 60° C. for 2 hours to obtain a tannic acid-modified fabric web.

[0031] (4) Soak the tannic acid-modified fabric net obtained in step (3) in the long-chain alkylamine solution, react at 60°C for 12 hours, take it out, and dry it in a drying oven at 80°C ...

Embodiment 2

[0034] (1) Clean the 300-mesh PET non-woven net and dry it for later use.

[0035] (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 10%; dissolving ferric chloride in ethanol to obtain a mass percentage of iron ions Content is the iron ion solution of 1%; Cetylamine is dissolved in ethanol, and the mass percentage composition that obtains cetylamine is the long-chain alkylamine solution of 5%;

[0036] (3) Soak the dried PET non-woven fabric 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 the process 4 times; take it out and dry it in a drying oven at 60° C. for 8 hours to obtain a tannic acid modified fabric net.

[0037] (4) Soak the tannic acid modified fabric net obtained in step (3) in the long-chain alkylamine solution, react at 60°C for 30 hours, take it out, and dry...

Embodiment 3

[0039] (1) Clean the 350-mesh copper mesh and dry it for later use.

[0040] (2) Dissolve tannic acid in water and adjust the pH to 9.0 to obtain a tannic acid solution with a mass percentage of tannic acid of 3%; dissolve ferric chloride in ethanol to obtain a mass percentage of iron ions Content is the iron ion solution of 2%; Cetylamine is dissolved in ethanol, and the mass percent composition that obtains cetylamine is the long-chain alkylamine solution of 8%;

[0041] (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 1 second, take it out and dry it; this process is repeated 5 times; After taking it out, it was dried in a drying oven at 80° C. for 8 hours to obtain a tannic acid-modified fabric web.

[0042] (4) Soak the tannic acid-modified fabric net obtained in step (3) in the long-chain alkylamine solution, react at 70°C for 20 hours, take it out, and dry it in a...

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Abstract

The invention discloses a preparation method of a superhydrophobic and super-lipophilic oil-water separation mesh membrane based on tannic acid modification. The preparation method provided by the invention adopts natural polyphenol tannic acid, long-chain alkylamine to modify a surface of a mesh membrane material, simultaneously realizes 'micro-nano structure' and 'low surface energy' of the surface of the material, prepares the superhydrophobic and super-lipophilic oil-water separation mesh membrane, avoids an additional construction process of a surface microstructure, has advantages of easily available and source-extensive raw materials and simple preparation process; and the prepared superhydrophobic and super-lipophilic oil-water separation mesh membrane has relatively good selectivepermeation for oil substances, 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 omentum, in particular to a preparation method of an oil-water separation omentum based on a tannic acid-modified super-hydrophobic and super-oleophilic oil-water separation omentum. 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...

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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