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Oil-water separation material based on electrostatic spinning/PVA composite hydrogel and preparation method thereof

A composite hydrogel and electrospinning technology, applied in separation methods, gel preparation, immiscible liquid separation, etc., can solve the problems of harsh preparation conditions, hard film formation, insufficient mechanical properties, etc. Simple process operation, high tensile strength effect

Active Publication Date: 2021-10-01
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many key scientific and technical bottlenecks in the application, such as insufficient mechanical properties, hard film formation, etc.
The preparation process often requires the use of cross-linking agents, and cross-linking agents such as glutaraldehyde have certain toxic effects and gelation usually takes several hours (or more), and the preparation conditions are relatively harsh

Method used

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  • Oil-water separation material based on electrostatic spinning/PVA composite hydrogel and preparation method thereof
  • Oil-water separation material based on electrostatic spinning/PVA composite hydrogel and preparation method thereof
  • Oil-water separation material based on electrostatic spinning/PVA composite hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First, PVA was dissolved in water at 95°C to prepare a PVA hydrogel with a mass fraction of 12%, and was incubated at 70°C for 2 hours to remove air bubbles. The 12wt.% PAN spinning precursor solution was spun into a film under a voltage of 15kv in a drum mode, and the PAN spinning fiber film was cut into a size of 6×6cm. Soak the cut PAN electrospinning membrane in PAN hydrogel for 30 minutes, put it in a -20°C refrigerator for 2 hours, thaw it at room temperature for 1 hour, and cycle 3 times to obtain an electrospinning / PVA hydrogel that can be used for oil-water separation network.

[0039] The tensile strength test was carried out on the prepared electrospun / PVA hydrogel separation net. And place the separation net on the funnel, pour the oil-water mixture into the separation net, and use gravity to separate the oil and water. Collect the separated water in the three-necked flask below the funnel, weigh to calculate the separation efficiency, and record the time ...

Embodiment 2

[0042]First, PVA was dissolved in water at 95°C to prepare a PVA hydrogel with a mass fraction of 12%, and was incubated at 70°C for 2 hours to remove air bubbles. A 9wt.% PVA spinning precursor solution was spun into a film in a drum mode at a voltage of 20kv, and the PVA spinning fiber film was cut into a size of 6×6cm. Soak the cut PVA electrospinning membrane in PVA hydrogel for 30 minutes, put it in a -20°C refrigerator for 2 hours, thaw at room temperature for 1 hour, and cycle 3 times to obtain an electrospinning / PVA hydrogel separation that can be used for oil-water separation network.

[0043] The tensile strength test was carried out on the prepared electrospun / PVA hydrogel separation net. And place the separation net on the funnel, pour the oil-water mixture into the separation net, and use gravity to separate the oil and water. Collect the separated water in the three-necked flask below the funnel, weigh to calculate the separation efficiency, and record the time...

Embodiment 3

[0046] First, PVA was dissolved in water at 95°C to prepare a PVA hydrogel with a mass fraction of 12%, and was incubated at 70°C for 2 hours to remove air bubbles. A 28wt.% PMMA spinning precursor solution was spun into a film in a drum mode at a voltage of 18kv, and the PMMA spun fiber film was cut into a size of 6×6cm. Soak the cut PMMA electrospinning membrane in PVA hydrogel for 30 minutes, put it in a -20°C refrigerator for 2 hours, thaw it at room temperature for 1 hour, and cycle 3 times to obtain an electrospinning / PVA hydrogel separation that can be used for oil-water separation network.

[0047] The tensile strength test was carried out on the prepared electrospun / PVA hydrogel separation net. And place the separation net on the funnel, pour the oil-water mixture into the separation net, and use gravity to separate the oil and water. Collect the separated water in the three-necked flask below the funnel, weigh to calculate the separation efficiency, and record the ...

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Abstract

The invention relates to an oil-water separation material based on electrostatic spinning / PVA composite hydrogel and a preparation method and application thereof. PVA, PAN and PMMA solutions are spun into a fiber membrane through an electrostatic spinning technology, the fiber membrane is functionally modified by the modified PVA hydrogel, and after freezing and unfreezing, the cross-linked PVA hydrogel is coated on the surface of the fiber rice to form the hydrophilic and oleophobic electrostatic spinning / PVA hydrogel separation material capable of being used for oil-water separation. The oil-water separation material prepared by the invention has high strength, can quickly realize oil-water separation, is especially suitable for a mixture of high-viscosity oil and water, and realizes quick oil-water separation.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a hydrogel copolymer, a preparation method of an oil-water separation net and an application thereof. Background technique [0002] With the development of industry, the treatment of oily wastewater has become an urgent problem to be solved. Traditional oil removal methods, such as coagulation, air flotation, flocculation, biological treatment, etc., have disadvantages such as complex operation, low separation efficiency, and high operating costs. In recent years, using the hydrophobic-lipophilic or oleophobic-hydrophilic properties of functionalized materials to achieve effective separation of oil-water mixtures has attracted widespread attention and a lot of exploration and research. The preparation of superhydrophilic / underwater superoleophobic separation materials to achieve oil-water separation by using porous materials such as steel mesh, copper me...

Claims

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Application Information

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IPC IPC(8): B01D17/022B01J13/00
CPCB01D17/02B01J13/0052B01J13/0065B01J13/0056
Inventor 程志林高德玉刘赞
Owner YANGZHOU UNIV