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Efficient oil and water separation composite fiber film and preparation method thereof

A composite fiber membrane, oil-water separation technology, used in fiber treatment, spinning solution preparation, textiles and papermaking, etc., can solve the problems of reduced absorption selectivity and efficiency, limited amount of oil-water separation materials, complex process steps, etc. High performance, good separation and removal effect, and simple preparation method

Inactive Publication Date: 2014-06-18
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only leads to the reduction of absorption selectivity and efficiency, but also brings great difficulties to the recovery of absorbed oil and used materials.
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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  • Efficient oil and water separation composite fiber film and preparation method thereof
  • Efficient oil and water separation composite fiber film and preparation method thereof
  • Efficient oil and water separation composite fiber film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Dissolve polystyrene (weight-average molecular weight 230,000) in analytically pure N,N-dimethylformamide solution, and configure N,N-dimethylformamide with a mass fraction of 25% polystyrene formamide solution.

[0027] (2) Doping hydrophobic silica nanoparticles with a diameter of 105 nm into the polymer solution prepared in the above step (1) to obtain a mixed solution, wherein the mass fraction of silica accounts for 35% of the mixed solution, and stir and mix evenly.

[0028] (3) The mixed solution containing silica nanoparticles configured through step (2) is placed in an electrospinning device ( figure 1 Shown) in the liquid supply syringe, the diameter of the metal spinneret is selected to be 0.8mm, and the applied voltage is 25KV. Adjust the distance between the spinneret and the receiving substrate at 25 cm. During the preparation process, the above mixed solution is used as an electrospinning solution, and a jet is generated under the action of electros...

Embodiment 2

[0033] (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 8:2, configured as a N,N-dimethylformamide / tetrahydrofuran solution with a mass fraction of 30% polystyrene.

[0034] (2) Doping hydrophobic silica nanoparticles with a diameter of 50 nm into the polymer solution prepared in the above step (1) to obtain a mixed solution, wherein the mass fraction of silica accounts for 50% of the mixed solution, and stir and mix evenly.

[0035](3) Put the mixed solution containing silica nanoparticles prepared in step (2) into the liquid supply syringe of the electrospinning device as the electrospinning solution, select the diameter of the metal spinneret as 1.6mm, and apply the voltage as 30KV. Adjust the distance between the spinneret and the receiving substrate at 30 cm. During the preparation process, the above-mentioned...

Embodiment 3

[0039] (1) Polyurethane (Sigma-Aldirich) was dissolved in analytically pure N,N-dimethylformamide solution to prepare a polyurethane N,N-dimethylformamide solution with a mass fraction of 10%.

[0040] (2) Doping hydrophobic silica nanoparticles with a diameter of 150 nm into the above polymer solution, stirring and mixing uniformly to form a mixed solution, wherein the mass fraction of silica accounts for 20% of the mixed solution.

[0041] (3) The mixed solution prepared in step (2) was placed in the liquid supply syringe of the electrospinning device as the electrospinning solution, the diameter of the metal spinneret was selected to be 0.6mm, and the applied voltage was 10KV. Adjust the distance between the spinneret and the receiving substrate at 10 cm. During the preparation process, the above-mentioned electrospinning solution generates a jet under electrostatic action. When the electric field force is higher than the surface tension of the polyurethane-silica mixed ele...

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Abstract

The invention discloses an efficiency oil and water separation composition fiber film and a preparation method thereof, and belongs to the field of functional nanometer fiber materials. Hydrophobic polymers such as polyurethane, polystyrene and polymethyl methacrylate or polycaprolactone are used as the main raw materials of the fiber film, the main raw materials are dissolved in an organic solvent to form a polymer solution, hydrophobic nanometer particles are added into the polymer solution in the preparation process, after the mixture is evenly mixed, electro-spinning is conducted on the mixed solution by means of the electrostatic spinning method, and then a fiber film material which is formed by micro-nanometer composite structures and is in the shape of non-woven fabric is obtained. The electro-spun fiber film of the micro-nanometer structure has super-hydrophobic / super-oleophylic property in the air and excellent oil adsorption performance, and the contact angle to oil is nearly zero. The efficient oil and water separation composite fiber film is simple in preparation method, low in energy consumption, high in efficiency, high in oil and water separation speed, and capable of being widely used in the fields such as oily water efficient purification.

Description

technical field [0001] The invention belongs to the field of functional micro-nano composite fiber materials, and specifically relates to an "oil-absorbing" micro-nano composite fiber membrane with high-efficiency oil-water separation and a preparation method thereof. Background technique [0002] Industrial processes such as petrochemical, mineral mining, transportation, food and textiles, daily life and frequent marine oil spill accidents will produce a large amount of oily sewage. These sewages flow into the ocean or seep into the ground in various ways, causing serious damage to the water resources that human beings depend on for survival. Therefore, no matter from the sustainable development of the environment or from the recovery of oil and the purification and reuse of water, effective separation of oily sewage is required. With the deepening of research and application, people found that many traditional oil-water separation materials can not only absorb oil, but al...

Claims

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Application Information

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IPC IPC(8): D04H1/728D01D1/02D01D5/00D01F1/10
Inventor 吴晶
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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