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Method for strengthening mechanical property of nanofiber membrane

A nanofiber membrane and mechanics technology, applied in fiber processing, radiation wave/microwave fiber processing, textiles and papermaking, etc., can solve the problems of high energy consumption and low energy utilization rate, achieve simple operation, enhanced mechanical properties, cost low cost effect

Active Publication Date: 2016-03-23
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although thermal annealing treatment can effectively improve the mechanical properties of nanofiber membranes, this treatment method generally requires high temperature and high pressure treatment for several hours or even longer, and has the disadvantages of high energy consumption and low energy utilization rate.

Method used

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  • Method for strengthening mechanical property of nanofiber membrane
  • Method for strengthening mechanical property of nanofiber membrane
  • Method for strengthening mechanical property of nanofiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) adding polyethyleneimine to 60wt% acetic acid solution to prepare a cationic polyelectrolyte solution with a mass fraction of 1wt%;

[0024] (2) adding pectin to 90wt% formic acid solution to prepare an anionic polyelectrolyte solution with a mass fraction of 50wt%;

[0025] (3) Blending the polyelectrolyte solution described in the above step 1) and step 2) with a mass ratio of 1:9, stirring for 2 hours to obtain a uniform and transparent electrospinning precursor solution;

[0026] (4) The above-mentioned prepared solution is packed into a syringe, and fixed on the propeller of the electrospinning device, and the polyelectrolyte composite nanofiber membrane is prepared by electrospinning; wherein the conditions of the electrospinning are as follows: the spinning temperature is 20°C, humidity 20%, propulsion speed 1.0mL / h, voltage 35kV, distance from spinneret to receiving plate 10cm;

[0027] (5) The prepared polyelectrolyte composite nanofiber membrane was subje...

Embodiment 2

[0030] (1) Chitosan is added in the acetic acid solution of 80wt% to prepare the cationic polyelectrolyte solution that mass fraction is 20wt%;

[0031] (2) adding gelatin to 60wt% formic acid solution to prepare an anionic polyelectrolyte solution with a mass fraction of 30wt%;

[0032] (3) Blending the polyelectrolyte solution described in the above step 1) and step 2) with a mass ratio of 2:8, stirring for 10 hours to obtain a uniform and transparent electrospinning precursor solution;

[0033] (4) The above-mentioned prepared solution is packed into a syringe, and fixed on the propeller of the electrospinning device, and the polyelectrolyte composite nanofiber membrane is prepared by electrospinning; wherein the conditions of the electrospinning are as follows: the spinning temperature is 40°C, humidity 60%, propulsion speed 2.0mL / h, voltage 25kV, distance from spinneret to receiving plate 20cm;

[0034] (5) The prepared polyelectrolyte composite nanofiber membrane was su...

Embodiment 3

[0037] (1) adding chitosan quaternized derivatives to 70wt% acetic acid solution to prepare a cationic polyelectrolyte solution with a mass fraction of 15wt%;

[0038] (2) adding gum arabic to 40wt% trifluoroacetic acid solution to prepare an anionic polyelectrolyte solution with a mass fraction of 10wt%;

[0039] (3) blending the above-mentioned polyelectrolyte solution with a mass ratio of 5:5, and stirring for 5 hours to obtain a uniform and transparent electrospinning precursor solution;

[0040] (4) Put the above prepared solution into a syringe, and fix it on the propeller of the electrospinning device, and prepare the polyelectrolyte composite nanofiber membrane by electrospinning. Wherein the condition of electrospinning is as follows: spinning temperature is 30 ℃, and humidity is 30%, and advancing speed is 0.8mL / h, and voltage is 15kV, and the distance from spinneret to receiving plate is 15cm;

[0041] (5) The prepared polyelectrolyte composite nanofiber membrane was...

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Abstract

The invention relates to a method for strengthening the mechanical property of nanofiber membrane. The method comprises the following steps that 1, cationic polyelectrolyte is added to good solvent of the cationic polyelectrolyte to be fully dissolved, and a solution is obtained; 2, anionic polyelectrolyte is added to good solvent of the anionic polyelectrolyte to be fully dissolved, and a solution is obtained; 3, polyelectrolyte solutions obtained in the first step and the second step are mixed together according to the the mass ratio of 1:9 to 9:1, stirring is conducted, and an electrostatic spinning precursor solution is obtained; 4, electrostatic spinning is conducted on the electrostatic spinning precursor solution obtained in the third step, and a polyelectrolyte composite nanofiber membrane is prepared; 5, the prepared polyelectrolyte composite nanofiber membrane is put into a microwave reactor for microwave treatment. The method for strengthening the mechanical property of the nanofiber membrane has the advantages of being easy to operate, outstanding in effect, low in cost, green and environmentally friendly, the method is expected to be used for industrial production, and a new method can be provided for rapidly and efficiently strengthening the mechanical property of the composite nanofiber membrane.

Description

technical field [0001] The invention belongs to the technical field of polymer materials. Specifically, it relates to a method for rapidly and efficiently enhancing the mechanical properties of nanofibrous membranes by using electrostatic compounding combined with microwave treatment. Background technique [0002] Nanofibrous membrane refers to a wire-like material with a diameter of nanoscale and a large length with a certain aspect ratio. Nanofibrous membranes have outstanding characteristics such as small scale, large specific surface area, surface functionalization, and the ability to effectively control the fine structure of fibers. Multifunctional nanofibrous membranes have good application prospects in biomedical materials, filtration protection, sensing materials, catalytic carriers, solar cells and other fields. In practical applications, the target material is usually required to have various properties. In the preparation process of nanomaterials, the character...

Claims

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Application Information

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IPC IPC(8): D04H1/4382D04H1/728D06M10/00
CPCD04H1/4382D04H1/728D06M10/003
Inventor 蔡宁韩超喻发全曾欢付晶罗晓刚
Owner WUHAN INSTITUTE OF TECHNOLOGY
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