Structure-enhanced hydrotalcite-immobilized composite fiber membrane and preparation method and application thereof

A composite fiber membrane and hydrotalcite technology, which is applied in the field of membrane materials, can solve the problems of loss, difficulty in recycling, and reuse, and achieve the effects of enhanced wind pressure resistance, improved electrostatic adsorption effect, and simple preparation methods

Active Publication Date: 2020-07-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since hydrotalcite is a powder material, it is prone to loss during use, and it is difficult to recyc

Method used

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  • Structure-enhanced hydrotalcite-immobilized composite fiber membrane and preparation method and application thereof
  • Structure-enhanced hydrotalcite-immobilized composite fiber membrane and preparation method and application thereof
  • Structure-enhanced hydrotalcite-immobilized composite fiber membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0059] The preparation method of nickel-aluminum hydrotalcite is the same as above, the only difference is that 2.3264g Ni (NO 3 ) 2 ·6H 2 O replaces Mg(NO 3 ) 2 ·6H 2 O.

[0060] Polyacrylonitrile (PAN) was purchased from J&K Chemical, MW=150000;

[0061] Polyvinylidene fluoride (PVDF) was purchased from Sigma-Aldrich, MW=534000;

[0062] Polycaprolactone (PCL) was purchased from J&K Chemical, MW=10000;

[0063] Nylon-6, CAS No. 25038-54-4;

[0064] Polylactic acid, CAS No. 26100-51-6;

[0065] Magnesium nitrate, aluminum nitrate, and urea were purchased from Xilong Chemical Co., Ltd., all of analytical grade.

Embodiment 1

[0067] A preparation method of a structure-reinforced hydrotalcite-supported composite fiber membrane, comprising the following steps:

[0068] (1) Measure 10 mL of N,N-dimethylformamide, add 0.3 g of magnesium-aluminum hydrotalcite to it, and disperse it by ultrasonic, then add 1 g of polyacrylonitrile to the solution, and stir to fully dissolve the polyacrylonitrile. to obtain an electrospinning solution;

[0069] (2) 9 mL of chloroform and 1 mL of N,N-dimethylformamide were weighed, 0.60 g of polycaprolactone was added thereto, and stirred to completely dissolve to obtain an electrostatic spray solution.

[0070] (3) Transfer the electrospinning solution to the syringe, set the spinning needle on the side of the drum receiver, set the electric field voltage between the spinning needle and the drum receiver to 17kV, set the distance to 18cm, and set the spinning flow to 1mL / h;

[0071] Transfer the electrostatic spray solution to the syringe, set the spray needle on the t...

Embodiment 2

[0076] A preparation method of a structure-reinforced hydrotalcite-supported composite fiber membrane, comprising the following steps:

[0077] (1) Measure 7mL of N,N-dimethylformamide and 3mL of acetone, add 0.3g of nickel-aluminum hydrotalcite to it, and disperse it by ultrasonic, then add 1.5g of polyvinylidene fluoride to the solution, stir to make polyvinylidene fluoride The vinylidene fluoride is fully dissolved to obtain the electrospinning solution;

[0078] (2) 9 mL of chloroform and 1 mL of N,N-dimethylformamide were weighed, 0.60 g of polycaprolactone was added thereto, and stirred to completely dissolve to obtain an electrostatic spray solution.

[0079] (3) Transfer the spinning solution into the syringe, set the spinning needle on the side of the drum receiver, set the electric field voltage between the spinning needle and the drum receiver to be 17kV, the distance to be 18cm, and the spinning flow to be 1mL / h;

[0080] Transfer the spray solution into the syr...

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Abstract

The embodiment of the invention relates to the field of membrane materials, in particular to a structure-enhanced hydrotalcite-immobilized composite fiber membrane and a preparation method and application thereof. The embodiment of the invention provides the preparation method of the composite fiber membrane. The preparation method comprises the following steps: respectively preparing an electrostatic spinning solution and an electrostatic spraying solution, carrying out electrostatic spinning and electrostatic spraying at the same time, collecting electrostatic spinning fibers obtained through electrostatic spinning and electrostatic spraying particles obtained through electrostatic spraying in the same receiver so thata composite fiber membrane is obtained, drying the composite fiber membrane, and carrying out heat treatment on the dried composite fiber membrane. The electrostatic spinning technology and the electrostatic spraying technology are carried out at the same time, particles obtained through electrostatic spraying become nodes of fixed nanofibers after heat treatment so as to limit movement of the nanofibers, the integrity and the mechanical strength of the fiber membrane are improved, the wind pressure resistance is enhanced accordingly, and the application range of the fiber membrane obtained through electrostatic spinning is widened.

Description

technical field [0001] The invention relates to the field of membrane materials, in particular to a structure-enhanced hydrotalcite-immobilized composite fiber membrane, a preparation method and application thereof. Background technique [0002] Electrospinning is an efficient and simple method for making nanofibers. Under the action of electric field force, droplets at the spinneret overcome the effect of surface tension to stretch at a high speed, and the nanofibers can be completed by falling on the receiving end after the solvent evaporates rapidly. collect. By adjusting the solution concentration, voltage, receiving distance and other factors in the spinning process, the morphology and size of the fibers can be adjusted, and a nanofiber membrane composed of uniform fibers can be obtained. However, most of the electrospun fibers are stacked disorderly, and the slippage between fibers is very obvious during the stretching process, which leads to the poor mechanical stren...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D46/54B01D53/22B01D67/00B01D69/02B01D69/12B01D71/02
CPCB01D46/543B01D53/228B01D67/0079B01D69/02B01D69/12B01D71/024B01D71/06B01D2323/39
Inventor 宋宇飞李雷凯陈伟
Owner BEIJING UNIV OF CHEM TECH
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