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Method for preparing multi-acid/polymer hybrid nanofiber membrane by electrospinning

An electrospinning method and nanofiber membrane technology, which is applied in the field of preparation of polymer-based multi-acid hybrid nanofiber membranes, can solve problems such as inability to mass-produce, slow sewage treatment rate, and unstable material properties, and achieve Fast and efficient reduction and removal, stable size and uniform thickness

Active Publication Date: 2019-05-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies in the prior art, the present invention provides a method for preparing multi-acid / polymer hybrid nanofiber membranes by electrospinning, especially a method for in-situ reduction of metal ions on multi-acid / polymer composite nanofiber membranes, Solve the problems in the prior art that metal ions are easy to fall off after adsorption, difficult to recycle, slow sewage treatment rate, unstable material performance, and unable to be mass-produced

Method used

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  • Method for preparing multi-acid/polymer hybrid nanofiber membrane by electrospinning
  • Method for preparing multi-acid/polymer hybrid nanofiber membrane by electrospinning
  • Method for preparing multi-acid/polymer hybrid nanofiber membrane by electrospinning

Examples

Experimental program
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Effect test

Embodiment 1

[0054] A preparation method of tungstopolyacid / PAN hybrid nanofiber membrane, comprising steps as follows:

[0055] (1) Preparation of spinning solution

[0056] Add 0.5 g of polyacrylonitrile (PAN) particles to 6 mL of N,N-dimethylformamide (DMF), stir until the polyacrylonitrile is completely dissolved, then add 2 g of WCl 6 , stirred to WCl 6 Dissolve completely to obtain orange-red clear spinning solution;

[0057] (2) Electrospinning

[0058] Use the electrospinning equipment model ss-2535H of Beijing Yongkang Leye Co., Ltd. to carry out electrospinning, pour the spinning solution prepared in step (1) into the syringe, and use the rotating drum receiving plate for spinning; electrospinning The conditions are: voltage 15kV, electrode distance 170mm, temperature 20°C, relative humidity 30%, propulsion pump speed 0.08ml / min, to obtain the nanofiber membrane precursor;

[0059] (3) Precursor reduction

[0060] Put the nanofiber film precursor obtained in step (2) into an...

Embodiment 2

[0065] As described in Example 1, the difference is:

[0066] WCl in step (1) 6 The addition amount is 1g;

[0067] Step (2) is with embodiment 1;

[0068] Step (3) is the same as in Example 1.

[0069] The SEM photos of the obtained tungstic acid / PAN hybrid nanofibers of the present embodiment are as follows figure 2 shown by figure 2 It can be seen that the diameter of tungstopolyacid / PAN hybrid nanofibers is uniform, and the average diameter is about 200nm.

Embodiment 3

[0088] A preparation method of tungstopolyacid / PVP hybrid nanofiber membrane, comprising steps as follows:

[0089] (1) Preparation of spinning solution

[0090] Add 0.4 g of polyvinylpyrrolidone (PVP) particles into 5 mL of N,N-dimethylformamide (DMF), stir until the polyacrylonitrile is completely dissolved, then add 0.5 g of WCl 6 , stirred to WCl 6 Dissolve completely to obtain blue-green clear spinning solution;

[0091] (2) Electrospinning

[0092] Use the electrospinning equipment model ss-2535H of Beijing Yongkang Leye Co., Ltd. to carry out electrospinning, pour the spinning solution prepared in step (1) into the syringe, and use the rotating drum receiving plate for spinning; electrospinning The conditions are: voltage 15kV, electrode distance 170mm, temperature 30°C, relative humidity 20%, propulsion pump speed 0.08mL / min, to obtain the nanofiber membrane precursor;

[0093] (3) Precursor reduction

[0094] Put the nanofiber film precursor obtained in step (2) ...

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Abstract

The invention relates to a method for preparing a polyacid / macromolecule hybrid nanofiber membrane by using an electrospinning method. The method comprises the following steps: (1) adding an organic macromolecule compound into N,N-dimethylformamide; stirring until the organic macromolecule compound is dissolved completely; then adding WCl6 or MoCl5, and stirring until WCl6 or MoCl5 is dissolved completely to obtain a spinning solution; (2) carrying out electrostatic spinning on the spinning solution to obtain a nanofiber membrane precursor; and (3) carrying out heat treatment on the nanofiber membrane precursor at the temperature of 40-100 DEG C, and then radiating the nanofiber membrane precursor under ultraviolet light to obtain the final product. The sizes of polyacid particles in the prepared hybrid nanofiber membrane are stable, obvious agglomeration is avoided, the polyacid particles are uniformly distributed on the surfaces of fibers, therefore, the color changing speed of the fibers under radiation of the ultraviolet light and the speed of reduction of precious metal and heavy metal ions into metal element are greatly increased, and the effect of removing heavy metal ions in sewage by using the hybrid nanofiber membrane can be achieved to a maximum extent.

Description

technical field [0001] The invention relates to a preparation method of a polymer-based multi-acid hybrid nanofiber membrane, belonging to the technical field of nanomaterial preparation. Background technique [0002] Water is an essential part of human survival, but with the increasingly serious environmental pollution and the reduction of drinking water supply in recent years, people have realized the importance of protecting water resources and developing new technologies for purifying water resources. It is imperative to carry out necessary treatment of industrial sewage and domestic sewage before being discharged into nature. These pollutants, as a by-product of industrialization and social development, pose a serious challenge to urban water treatment technology. These sewage pollutants mainly include heavy metal ions, toxic dye molecules and radioactive elements. The traditional sewage treatment process is inefficient, and at the same time, due to the excessive use,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D01D5/00D01D1/02D06C7/00D06M10/00
CPCD01D1/02D01D5/0015D04H1/728D06C7/00D06M10/001D10B2505/04
Inventor 王挺陈代荣焦秀玲魏菁
Owner SHANDONG UNIV
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