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Magnetic response type high-efficiency oil-water separation fiber membrane and preparation method thereof

A technology of oil-water separation and fiber membrane, which is applied in the field of functional micro-nano composite fiber materials, can solve problems such as high cost, complicated process steps, and limited amount of oil-water separation materials, and achieve large-scale production, simple experimental operation, and a preparation method simple effect

Inactive Publication Date: 2015-03-25
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, some traditional preparation methods still have shortcomings such as complex process steps, high cost, and limited amount of oil-water separation materials prepared at one time, which directly affect the practical application of materials.

Method used

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  • Magnetic response type high-efficiency oil-water separation fiber membrane and preparation method thereof
  • Magnetic response type high-efficiency oil-water separation fiber membrane and preparation method thereof
  • Magnetic response type high-efficiency oil-water separation fiber membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Dissolve polyvinylidene fluoride (weight-average molecular weight 170,000) in analytically pure N,N-dimethylformamide solution, and configure N,N-dimethylformamide with a mass fraction of 18% polyvinylidene fluoride base formamide solution.

[0028] (2) Place the N,N-dimethylformamide solution of polyvinylidene fluoride configured in step (1) in the electrospinning device ( figure 1 Shown) in the liquid supply syringe 1, the diameter of the metal spinneret 2 is selected to be 0.6mm, and the high voltage power supply 5 provides a power supply voltage of 20KV. Adjust the distance between the metal spinneret 2 and the receiving base 4 to be 25 cm. During the preparation process, the electrospinning solution generates a jet under electrostatic action. When the electric field force is higher than the surface tension of the N,N-dimethylformamide solution (electrospinning solution) of polyvinylidene fluoride, the electrospinning solution is stretched fine During the fall...

Embodiment 2

[0036] (1) Dissolve polystyrene (weight-average molecular weight: 230,000) in analytically pure N,N-dimethylformamide / tetrahydrofuran mixed solution, wherein the mass ratio of N,N-dimethylformamide to tetrahydrofuran is 9:1, configured as a N,N-dimethylformamide / tetrahydrofuran solution with a mass fraction of 25% polystyrene.

[0037] (2) Place the N,N-dimethylformamide / tetrahydrofuran solution of polystyrene prepared in step (1) in the liquid supply syringe of the electrospinning device, select the diameter of the metal spinneret to be 1.0mm, and apply a voltage It is 25KV. Adjust the distance between the metal spinneret and the receiving substrate at 30 cm. During the preparation process, the above-mentioned electrospinning solution generates a jet under the action of electrostatic force. When the electric field force is higher than the surface tension of the N,N-dimethylformamide / tetrahydrofuran solution of polystyrene, the solution is stretched and refined, and the falli...

Embodiment 3

[0044] (1) Polyurethane (Sigma-Aldirich) was dissolved in analytically pure N,N-dimethylformamide solution to prepare a N,N-dimethylformamide solution with a mass fraction of 35% polyurethane.

[0045] (2) The polyurethane N,N-dimethylformamide solution prepared in step (1) was placed in the liquid supply syringe of the electrospinning device, the diameter of the metal spinneret was selected to be 1.8mm, and the applied voltage was 35KV. Adjust the distance between the spinneret and the receiving substrate at 35 cm. During the preparation process, the above-mentioned electrospinning solution generates a jet under the action of electrostatic force. When the electric field force is higher than the surface tension of the N,N-dimethylformamide solution of polyurethane, the solution is stretched and refined. During the falling process, the solvent N , The volatilization of N-dimethylformamide forms a polyurethane electrospun fiber membrane. The diameter of the fibers in the electr...

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Abstract

The invention discloses a magnetic response type high-efficiency oil-water separation fiber membrane and a preparation method thereof, and belongs to the field of functional micro-nano fiber materials. The magnetic response type high-efficiency oil-water separation fiber membrane disclosed by the invention is prepared by the following steps: dissolving hydrophobic polymers, such as polyvinylidene fluoride, polyurethane or polycaprolactone, as main raw materials into an organic solvent to form a polymer solution; preparing a non-woven fiber membrane material prepared from micro-nano structure fibers by adopting an electrospinning method; forming a sticky polydopamine membrane through polymerization of polydopamine in an alkaline solution, and firmly attaching magnetic nanoparticles onto the surface of an electrospinning fiber membrane by adopting the sticky polydopamine membrane, so as to prepare the magnetic response type high-efficiency oil-water separation fiber membrane. The fiber membrane disclosed by the invention has a super-hydrophobic / super-oleophilic property in air, and has an excellent adsorptive property on a plurality of common oils; the preparation method of the high-efficiency oil-water separation fiber membrane, disclosed by the invention, is simple, low in energy consumption, and high in efficiency,and can be widely applied to the fields such as remote controllable efficient separation of oily wastewater, and the magnetic responsiveness is realized.

Description

technical field [0001] The invention belongs to the field of functional micro-nano composite fiber materials, and in particular relates to a micro-nano composite fiber membrane with high-efficiency oil absorption performance of a magnetic response oil-water system and a preparation method thereof. Background technique [0002] The indiscriminate discharge of oily sewage from industrial production and daily life, as well as frequent oil spill accidents at sea have caused great pollution to the water resources that human beings depend on for survival, and also caused energy waste. Therefore, from the perspective of sustainable development of the environment and the needs of oil recovery and water purification and reuse, effective separation of oily sewage is required. With the deepening of research and application, on the one hand, it has been found that materials with special wettability, such as superhydrophilic / superoleophobic, superhydrophobic / superoleophilic materials, co...

Claims

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Application Information

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IPC IPC(8): B01D17/022D04H1/4326D04H1/728D06M15/61D06M11/49D06M101/22D06M101/38D06M101/20D06M101/26D06M101/32
CPCB01D17/02D04H1/4326D04H1/728D06M11/49D06M15/61D06M2101/20D06M2101/22D06M2101/26D06M2101/32D06M2101/38D06M2200/12
Inventor 吴晶
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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