Multi-level structure oil-water separation material with pH responsiveness and preparation method thereof
An oil-water separation and responsive technology, which is applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of cumbersome preparation methods, complex synthesis of polymer P, poor oil repellency, etc., and achieve good separation effect, Effects with simple synthesis steps
Active Publication Date: 2021-02-12
HARBIN ENG UNIV
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Problems solved by technology
However, its preparation method is cumbersome, and the step-by-step construction of surface roughness and low free energy make its operation complicated. Importantly, there are few reports on oil-water separation of oil / water / oil three-phase complex systems.
Chinese patent CN106243271A discloses a method for preparing a pH-responsive ester copolymer P, in which the material is soaked in a mixed solution of the polymer P and silica for oil-water separation, but the synthesis of the polymer P is complicated and the sponge The absorbed organic solvent needs to be extruded by external force, and the oil repelling effect is not good
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[0040] Weigh 1.61g of perfluorooctanoic acid (PFOA) into a 100mL beaker, add 30mL of deionized water to it, measure 1mL of aniline monomer and add it to the above PFOA solution, then place it in a constant temperature water bath at 25°C and stir for 30min to make it evenly mixed . Cut a 3cm×3cm polyester screen, wash it repeatedly with ethanol and deionized water, dry it, and then immerse it in the above mixed solution for 10 minutes. Weigh 2.74g of ammonium persulfate (APS) and dissolve it in 30mL of deionized water, ultrasonically shake until completely dissolved, and add the APS solution drop by drop into the beaker at a constant speed while keeping stirring. When the APS was added, the stirring was continued for 5 min, and then the stirring was stopped. The whole system was left to react for 24 hours in a constant temperature water bath at 25°C. After the reaction, the polyaniline / polyester mesh composite material was washed with absolute ethanol until it was colorless a...
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Abstract
The invention provides a pH-responsive multi-stage structure oil-water separation material and a preparation method thereof. Aniline is used as a monomer, perfluorooctanoic acid is used as a dopant, ammonium persulfate is used as an oxidant, and polyester mesh, porous sponge, cotton Fabric, cotton, etc. are used as substrates, and polyaniline composite materials with micro / nano multi-level structures are synthesized by in-situ chemical oxidation polymerization. The present invention has a large number of micro interlaced polyaniline fibers in the overall network structure. In the invention, polyaniline and sponge are compounded to form a novel material with super-hydrophobic / super-oleophilic properties. Using aniline in-situ chemical oxidation polymerization to synthesize polyaniline composite materials in one step for oil-water separation, the synthesis process is simple, and the raw materials are easy to obtain; the invention is universal and can be applied to the surface of various substrates; the material can be adjusted by adjusting the pH value Carry out oil-water separation of oil / water / oil three-phase system, absorb different organic solvents in water, and discharge them without external force in alkaline solvents.
Description
technical field [0001] The invention relates to an oil-water separation material and a preparation method thereof, in particular to a pH-responsive multi-level structure oil-water separation material and a preparation method thereof, belonging to the synthesis of micro / nano multi-level structure composite materials. Background technique [0002] With the increasing demand for offshore oil extraction and the rapid development of modern industry, oil field leakage incidents and improper discharge of organic matter in industrial production occur frequently, causing serious pollution to natural water resources and soil, disrupting the balance of the ecosystem, and even Threats to human health, but also a waste of energy. Traditional oil-water separation technologies such as filtration, adsorption, and centrifugation have high costs and low separation efficiency. Traditional oil-water separation materials such as activated carbon and clay have low recycling rates, poor separation...
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IPC IPC(8): B01D17/022C02F1/40C08G73/02
CPCB01D17/0202C02F1/40C08G73/0266
Inventor 李瑞琦王景风张国立王鹏理沙志强
Owner HARBIN ENG UNIV
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