PH-responsive oil-water separation material and preparation method and application thereof

An oil-water separation and responsive technology, which is applied in the direction of separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of large energy consumption of high-voltage electrostatic fields, environmental pollution of separation membranes, complex preparation processes, etc., and achieve high-efficiency separation and raw materials. Inexpensive and simple preparation process

Active Publication Date: 2018-12-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the separation membrane obtained by this method has great pollution to the environment.
[0005] Most of the stimuli-responsive materials in the existing technologies often use expensive raw materials such as gold and silver, or highly polluting substances containing fluorine, which severely limit their practical applications due to high cost and high pollution.
Chinese invention patent application CN107881649A adds silver nanoparticles to electrospinning and spins under a high-voltage electrostatic field. Although this technology successfully prepares a photothermal-responsive oil-water separation material, on the one hand, the price of silver is high, and the high-voltage electrostatic field consumes On the other hand, the preparation process is complicated, which makes it difficult to promote this method in a large area in practice.

Method used

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  • PH-responsive oil-water separation material and preparation method and application thereof
  • PH-responsive oil-water separation material and preparation method and application thereof
  • PH-responsive oil-water separation material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A preparation method of a pH-responsive oil-water separation material, comprising the steps of:

[0039] (1) The cotton cloth is ultrasonically cleaned with deionized water and ethanol in turn, and dried for later use;

[0040] (2) Prepare 100ml of Tris buffer solution with a pH value of 6 and a concentration of 20mM, and dissolve 0.02g of dopamine into the acid-base buffer (Tris buffer solution) to obtain a dopamine-Tris buffer solution;

[0041](3) Soak the cotton cloth in the dopamine-Tris buffer solution and shake it. After 24 hours, obtain a cotton cloth with uniform deposition of polydopamine, then wash it with deionized water 10 times, soak it in the aqueous solution overnight, and then dry it;

[0042] (4) Prepare a pH value of 8 and a concentration of 10 mM Tris buffer solution, dissolve cystamine dihydrochloride in the Tris buffer solution, and control the concentration to 0.05mol / L to obtain cystamine dihydrochloride solution ;

[0043] (5) Soak the cotton ...

Embodiment 2

[0053] A preparation method of a pH-responsive oil-water separation material, comprising the steps of:

[0054] (1) The stainless steel filter screen is ultrasonically cleaned with deionized water and ethanol in turn, and dried for later use;

[0055] (2) Prepare 100ml of sodium dihydrogen phosphate-citric acid buffer solution with a pH value of 8 and a concentration of 30mM, and dissolve 0.06g of 2-hydroxyphenylalanine into the acid-base buffer solution (sodium dihydrogen phosphate-citric acid buffer solution), obtain 2-hydroxyphenylalanine / sodium dihydrogen phosphate solution;

[0056] (3) Soak the stainless steel filter in 2-hydroxyphenylalanine-sodium dihydrogen phosphate solution and shake it. After 18 hours, a stainless steel filter with uniform deposition of 2-hydroxyphenylalanine is obtained, and then wash it with deionized water Multiple times, soak in aqueous solution overnight and then dry;

[0057] (4) Prepare a pH value of 8, a concentration of 15mM sodium dihyd...

Embodiment 3

[0064] A preparation method of a pH-responsive oil-water separation material, comprising the steps of:

[0065] (1) Clean the copper grid with deionized water and ethanol ultrasonically in turn, and dry it for later use;

[0066] (2) Prepare 100ml of Tris buffer solution with a pH value of 8.5 and a concentration of 10mM, and dissolve 0.05g of dopamine in the acid-base buffer solution to obtain a dopamine-Tris buffer solution;

[0067] (3) Soak the copper grid in the dopamine-Tris buffer solution and shake it. After 12 hours, the copper grid with uniform deposition of polydopamine was obtained, and then washed with deionized water several times, soaked in the aqueous solution overnight and then dried;

[0068] (4) Prepare a Tris buffer solution with a pH value of 8.5 and a concentration of 5mM, and dissolve cystine hydrochloride in the Tris buffer solution with a concentration of 0.05mol / L;

[0069] (5) Soak the copper mesh dried in step (3) in cystine hydrochloride solution ...

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Abstract

The invention discloses a pH-responsive oil-water separation material and a preparation method and application thereof. The preparation method is as follows: first pretreating a substrate, preparing an amine monomer solution, and soaking the substrate in the amine monomer solution; preparing a cystamine solution, soaking the treated substrate in the cystamine solution, washing, drying, and soakingthe substrate in a reducing solution; dissolving a functional monomer containing an unsaturated bond and a pH-responsive monomer containing an unsaturated bond in an organic solvent, adding a photoinitiator to obtain a mixed monomer solution, immersing the obtained substrate in the mixed monomer solution, illuminating under ultraviolet light, washing and drying. The material exhibits superhydrophobic / superlipophilic properties when being acidic and neutral; when pH=12, the material changes from superhydrophobic / superlipophilic to superhydrophilic / underwater superoleophobic. The pH-responsiveoil-water separation material realizes controllable separation of heavy oil, water and light oil, and has application prospects in sewage treatment, oil-water separation and treatment of deep sea oilleakage.

Description

technical field [0001] The invention relates to the technical field of oil-water separation, in particular to a pH-responsive oil-water separation material, a preparation method and an application method thereof. Background technique [0002] The development of industrialization and the oily wastewater discharged randomly in people's daily life are affecting the living environment of human beings. At the same time, a large number of toxic substances are endangering human health through the food chain. Therefore, research and production of functional materials for oil-water separation that efficiently treat oily sewage and improve oil quality are of great significance to social development. Traditional oil-water treatment technologies, such as combustion method, centrifugal separation method, flotation method, electrolysis method, physical adsorption method, etc., but these methods have many defects, some of which are high in energy consumption, high in cost, and somewhat ine...

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 文秀芳杨康铨曾新娟皮丕辉徐守萍程江
Owner SOUTH CHINA UNIV OF TECH
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