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Production method of highly stable and biodegradable double-network oil-water separation net membrane

A technology of oil-water separation omentum and biodegradation, which is applied in the field of preparation of oil-water separation materials, can solve the problems of the hydrophilic layer substrate falling off or being damaged, the omentum material is not easy to biodegrade, and the efficiency of oil-water separation decreases, etc., to achieve good superoleophobicity capacity, high oil/water separation efficiency, and fast filtration speed

Active Publication Date: 2018-11-30
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reported hydrogel omentum materials mainly have the following two important shortcomings: first, its hydrophilic layer is easily detached or damaged from the substrate during long-term use, resulting in a sharp drop in oil-water separation efficiency; The durability of the material is not strong; the second is that the production process uses more toxic glutaraldehyde as a cross-linking agent, and uses sodium borohydride for reduction. On the one hand, the complete cross-linking of the glutaraldehyde cross-linking agent causes the prepared omentum material Brittle, poor stability, on the other hand, the introduction of these chemicals makes the omentum material difficult to biodegrade

Method used

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  • Production method of highly stable and biodegradable double-network oil-water separation net membrane
  • Production method of highly stable and biodegradable double-network oil-water separation net membrane
  • Production method of highly stable and biodegradable double-network oil-water separation net membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0055] A kind of preparation method with high stability biodegradable double network oil-water separation omentum, comprises the following steps (as Figure 1-4 shown):

[0056] 1. Preparation of copper mesh with nano-sheet rough structure on the surface:

[0057] (1) Get a copper mesh with a diameter of 3 cm and an average aperture of 30 microns (such as figure 2 a and figure 2 As shown in b), soak the copper mesh in ethanol or acetone, place it in an ultrasonic device for 20-30 minutes, take out the copper mesh and rinse it with deionized water for 3-5 times, and then place it in ultrasonic water for 6-15 minutes;

[0058] (2) Place the cleaned copper grid in a mixed solution of 0.2mol / L sodium hydroxide and 0.1mol / L ammonium persulfate, soak for 0.5-2h;

[0059] (3) Take out the copper mesh, clean it with ultrapure water, and purge the surface of the copper mesh with nitrogen until dry, and obtain a copper mesh with a nano-sheet rough structure on the surface (such as ...

Embodiment 2

[0074] A kind of preparation method with high stability biodegradable double network oil-water separation omentum, comprises the following steps:

[0075] 1. Preparation of copper mesh with nano-sheet rough structure on the surface:

[0076] (1) Take a copper mesh with a diameter of 5 cm and an average pore size of 40 microns, soak the copper mesh in ethanol or acetone, place it in an ultrasonic device for 20-30 minutes, take out the copper mesh and rinse it with deionized water for 3- 5 times, and then washed in ultrasonic water for 6-15 minutes;

[0077] (2) Place the cleaned copper grid in a mixed solution of 0.4mol / L sodium hydroxide and 0.3mol / L ammonium persulfate, soak for 0.5-2h;

[0078] (3) Take out the copper mesh, clean it with ultrapure water, and purge the surface of the copper mesh with nitrogen until dry to obtain a copper mesh with a nano-sheet rough structure on the surface;

[0079] (1) A certain amount of chitosan is dissolved in 2wt% acetic acid aqueous ...

Embodiment 3

[0089] A kind of preparation method with high stability biodegradable double network oil-water separation omentum, comprises the following steps:

[0090] 1. Preparation of copper mesh with nano-sheet rough structure on the surface:

[0091] (1) Take a copper mesh with a diameter of 4 cm and an average pore size of 50 microns, soak the copper mesh in ethanol or acetone, place it in an ultrasonic device for 20-30 minutes, take out the copper mesh and rinse it with deionized water for 3- 5 times, and then washed in ultrasonic water for 6-15 minutes;

[0092] (2) Place the cleaned copper grid in a mixed solution of 6mol / L sodium hydroxide and 2mol / L ammonium persulfate, soak for 0.5-2h;

[0093] (3) Take out the copper mesh, clean it with ultrapure water, and purge the surface of the copper mesh with nitrogen until dry to obtain a copper mesh with a nano-sheet rough structure on the surface;

[0094] 2. Preparation of genipin partially cross-linked chitosan omentum:

[0095] (1)...

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Abstract

The invention relates to a production method of a highly stable and biodegradable double-network oil-water separation net membrane. A copper net with the surface having a nanosheet rough structure after oxidation treatment is adopted as a substrate support material, natural polyose substances sodium alginate and chitosan having the advantages of high hydrophilicity, good salt resistance and biodegradability are used as main body glue-forming materials, and an inner layer chitosan network is partially crosslinked by a natural biological cross-linking agent genipin to make the inner layer chitosan network fixed on the copper net substrate and keep the flexibility of the network structure of the chitosan; and an outer sodium alginate network is physically cross-linked and fixed by adopting divalent calcium ions, and the inner layer and the outer layer are self-assembled by electrostatic force and hydrogen bonds to form a double-layer network structure. The oil-water separation net membrane with the special double-network structure has the advantages of high oil-water separation efficiency, good resistance to oil stains, acids, alkalis and high-salt environments, high stability and good durability; and additionally, a coating layer formed by the net membrane is green and environmentally friendly, and is completely degradable.

Description

technical field [0001] The invention relates to a preparation method of an oil-water separation material, in particular to a preparation method of a biodegradable double-network oil-water separation omentum with high stability. Background technique [0002] The frequent occurrence of industrial oily wastewater discharge and marine oil spill accidents seriously threatens the improvement of human living environment and living standards, which makes the development of new oil-water separation technology very important. Traditional methods such as ultrasonic separation, air flotation, electrocoagulation, and membrane filtration have problems such as high energy consumption, low separation efficiency, and secondary pollution. Therefore, the development of efficient, environmentally friendly, and economical oil-water separation materials can be applied to extreme Complex environments are imperative. [0003] Oil / water separation is an interfacial problem, and the development of f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022C02F1/40
CPCB01D17/02C02F1/40
Inventor 张慧李玉歧卢泽湘黄六莲陈礼辉
Owner FUJIAN AGRI & FORESTRY UNIV
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