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Electrostatic spinning method and device of fiber-based waterproof moisture-permeable film high in moisture-permeable flux

A waterproof and moisture-permeable film, electrospinning technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve the problems of inter-fiber adhesion and low porosity, difficult to control, etc., to improve waterproof and moisture-permeable performance, reduce adhesion degree, the effect of increasing diffusion and exchange rates

Active Publication Date: 2015-03-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an electrospinning method and device for a fiber-based waterproof and moisture-permeable membrane with high moisture permeability, and to solve the problem of fiber-based waterproof and moisture-permeable membrane electrostatic spinning in the prior art. The degree of inter-adhesion and porosity are low and difficult to control

Method used

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  • Electrostatic spinning method and device of fiber-based waterproof moisture-permeable film high in moisture-permeable flux

Examples

Experimental program
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Effect test

Embodiment 1

[0058] An electrospinning method of a fiber-based waterproof and moisture-permeable membrane with high moisture permeability, the specific steps are:

[0059] Step 1: After drying the polyvinylidene fluoride powder in a vacuum oven at 130°C for 2.5 hours, dissolve it in acetone to prepare a solution with a concentration of 25%;

[0060] The second step: pour the solution into the nozzle through the liquid supply system, the liquid supply speed is 10mL / h, the textile is used as the receiving substrate, the distance from the receiving substrate to the spinneret is 50cm, and the applied voltage is 100kV for electrostatic Spinning; at the same time, the polymer solution jet is sprayed at an angle of 45° with a mixed side airflow of air and formic acid vapor, and the spray speed is 10m / s. The volume fraction of formic acid vapor in the mixed side airflow is 80%, and the temperature of the airflow is 30°C.

[0061] The obtained fiber-based waterproof and moisture-permeable membrane...

Embodiment 2

[0065] An electrospinning method of a fiber-based waterproof and moisture-permeable membrane with high moisture permeability, the specific steps are:

[0066] Step 1: After drying the polyvinylidene fluoride-hexafluoropropylene powder in a vacuum oven at 120°C for 1.5 hours, dissolve it in N,N-dimethylformamide to prepare a solution with a concentration of 25%;

[0067] The second step: pour the solution into the nozzle through the liquid supply system, the liquid supply speed is 0.1mL / h, the aluminum foil is used as the receiving substrate, the distance from the receiving substrate to the spinneret is 25cm, and the applied voltage is 75kV. Electrospinning; at the same time, the polymer solution jet was sprayed at an angle of 90° with a mixed lateral airflow of air and ethyl acetate vapor, and the spray speed was 0.1m / s. Wherein the ethyl acetate vapor accounts for 50% of the volume fraction of the mixed side airflow, and the temperature of the airflow is 45°C.

[0068] The o...

Embodiment 3

[0072] An electrospinning method of a fiber-based waterproof and moisture-permeable membrane with high moisture permeability, the specific steps are:

[0073] The first step: After drying the polyvinylidene fluoride-tetrafluoroethylene-perfluoromethyl vinyl ether particles in a vacuum oven at 120°C for 1.5 hours, they were dissolved in N-methylpyrrolidone and prepared with a concentration of 15%. solution;

[0074] The second step: pour the solution into the nozzle through the liquid supply system, the liquid supply speed is 2mL / h, the non-woven fabric is used as the receiving substrate, the distance from the receiving substrate to the spinneret is 15cm, and the applied voltage is 50kV Electrospinning is carried out; at the same time, the mixed side air flow of air and ethanol vapor is used to blow the polymer solution jet at an angle of 45°, and the blowing speed is 50m / s. The ethanol vapor accounts for 40% of the volume fraction of the mixed lateral airflow, and the tempera...

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Abstract

The invention relates to an electrostatic spinning method and device of a fiber-based waterproof moisture-permeable film high in moisture-permeable flux. The electrostatic spinning method includes that during electrostatic spinning, polymer solution jet flow is injected at a certain included angle with air of a certain temperature and / or lateral air flow of non-solvent steam, and polymer molecules in the jet flow are quickened to be separated and solidified into fibers; water-pressure resistance of the electrostatic spinning film, namely the fiber-based waterproof moisture-permeable film high in moisture-permeable flux is greater than or equal to 100kPa, and the moisture-permeable flux is greater than or equal to 15000g / m<2> / d. The electrostatic spinning device is composed of an electrostatic spinning box, a high-voltage direct-current power supply, an electrostatic spinning hydraulic system, a spinning jet and a receiving base material, and a steam generation and air supply system is mounted on one side of the electrostatic spinning box. The fiber-based waterproof moisture-permeable film produced by the method has the advantages of small bore diameter, controllable adhesion degree and high porosity; the film is high in water-pressure resistance and moisture-permeable flux when used in the waterproof and moisture-permeable areas, and is wide in actual application prospect.

Description

technical field [0001] The invention belongs to the field of electrospinning technology, and relates to an electrospinning method and device for a fiber-based waterproof and moisture-permeable membrane with high moisture permeability, in particular to a high moisture-permeable membrane for controlling the adhesion degree and porosity between fibers The electrospinning method and device of the fiber-based waterproof and moisture-permeable membrane of flux, specifically, is a kind of method for spraying polymer solution jet with air and / or non-solvent vapor side airflow with certain temperature An electrospinning method and device for a fiber-based waterproof and moisture-permeable membrane with high moisture permeability and high moisture permeability by controlling the degree of interfiber adhesion and porosity by accelerating the speed at which polymer molecules phase separate and solidify into fibers in the jet. Background technique [0002] Waterproof and moisture-permeab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/732
CPCD04H1/4382D04H1/728D04H1/732
Inventor 丁彬李洋生俊露赵景田海洋张龙威印霞俞建勇
Owner DONGHUA UNIV
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