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Preparation method for fluoride-free waterproof and moisture permeable fibrous membrane with photocatalytic self-cleaning function

A fluorine-free waterproofing and fluorine-free waterproofing agent technology, applied in the direction of fiber type, fiber treatment, fiber chemical characteristics, etc., can solve the problems of waterproof and moisture permeability decline, etc., and achieve the effect of simple and feasible technical solution, small pore size and environmental friendliness

Inactive Publication Date: 2019-06-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of a fluorine-free waterproof and moisture-permeable fiber membrane with photocatalytic self-cleaning function, to effectively solve the problem of waterproof and moisture-permeable performance degradation caused by the washing process of waterproof and moisture-permeable clothing, and to avoid fluorinated micropores Environmental hazards caused by waterproof and moisture-permeable membranes, while meeting the needs of the military and medical and health fields for self-cleaning protective clothing with high protection and comfort

Method used

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  • Preparation method for fluoride-free waterproof and moisture permeable fibrous membrane with photocatalytic self-cleaning function

Examples

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Effect test

Embodiment 1

[0031] A method for preparing a fluorine-free waterproof and moisture-permeable fiber membrane with photocatalytic self-cleaning function, the specific steps are:

[0032]1) Electrospinning fiber membrane preparation: dissolving polyacrylonitrile (relative molecular mass: 90,000) in organic solvent N,N-dimethylformamide to prepare a polyacrylonitrile solution with a mass fraction of 8wt%, mechanically stirring to obtain a uniform and stable The electrospinning solution of electrospinning solution; the polyacrylonitrile nanofiber layer was received on the glossy paper substrate by electrospinning, the spinning voltage was 20kV, the receiving distance was 20cm, the perfusion speed was 1mL / h, the temperature was 25°C, and the relative humidity was 40%.

[0033] 2) Take 2g of polydimethylsiloxane solution with a solid content of 25% (the solvent is n-hexane), add 98g of n-hexane to prepare a 2wt% polydimethylsiloxane solution, and make the polyacrylonitrile fiber film base The ma...

Embodiment 2

[0036] A method for preparing a fluorine-free waterproof and moisture-permeable fiber membrane with photocatalytic self-cleaning function, the specific steps are:

[0037] 1) Preparation of electrospun fiber membrane: dissolving polyacrylonitrile (relative molecular mass: 90,000) in organic solvent N,N-dimethylacetamide to prepare a polyacrylonitrile solution with a mass fraction of 10 wt%, and mechanically stirring to obtain a uniform and stable The electrospinning solution of electrospinning solution; the polyacrylonitrile nanofiber layer is received on the glossy paper substrate by electrospinning, the spinning voltage is 25kV, the receiving distance is 22cm, the perfusion speed is 3mL / h, the temperature is 25°C, and the relative humidity is 60%.

[0038] 2) get 4g solid content and be 20% stearic acid solution (solvent is ethyl acetate), add 96g ethyl acetate, prepare the stearic acid solution of 4wt%, fully impregnate the polyacrylonitrile fiber film substrate at room tem...

Embodiment 3

[0041] A method for preparing a fluorine-free waterproof and moisture-permeable fiber membrane with photocatalytic self-cleaning function, the specific steps are:

[0042] 1) Electrospinning fiber membrane preparation: dissolving polyacrylonitrile (relative molecular mass: 90,000) in the organic solvent dimethyl sulfoxide to prepare a polyacrylonitrile solution with a mass fraction of 9 wt%, mechanically stirring to obtain uniform and stable electrospinning Solution: Receive polyacrylonitrile nanofiber layer on glossy paper substrate by electrospinning, spinning voltage is 30kV, receiving distance is 20cm, perfusion speed is 1mL / h, temperature is 25°C, relative humidity is 40%.

[0043] 2) Get 5g of NT-X018 (U.S. NaNO-TEX) emulsion (dispersion medium is water) with a solid content of 20%, add 95g of deionized water, prepare 5wt% NT-X018 emulsion, and polyacrylonitrile fiber membrane substrate Fully immersed in NT-X018 emulsion at room temperature, then pre-baked at 110°C for 2...

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Abstract

The invention provides a preparation method for a fluoride-free waterproof and moisture permeable fibrous membrane with a photocatalytic self-cleaning function. The preparation method is characterizedby comprising the steps that step 1, an electrospun fiber membrane is prepared, wherein a hydrophilic polymer which cannot be dissolved in water is dissolved in a solvent to prepare an electrostaticspinning solution, and a fiber membrane base material is prepared through electrostatic spinning; step 2, the fiber membrane base material is dipped in an environmental-friendly fluoride-free waterproof agent solution or emulsion at the indoor temperature, then pre-dried and baked; step 3, nano-particles with the photocatalytic performance are utilized for conducting coating finish on the obtainedelectrospun fiber membrane, the obtained electrospun fiber membrane is subjected to high-temperature drying, and the fluoride-free waterproof and moisture permeable fibrous membrane with the photocatalytic self-cleaning function is obtained. The water resistance pressure of the prepared environmental-friendly fluoride-free waterproof and moisture permeable fibrous membrane is greater than or equal to 100 kPa, the water vapor transmission amount of the prepared environmental-friendly fluoride-free waterproof and moisture permeable fibrous membrane is greater than or equal to 15,000 g / m<2> / d, the strength of the prepared environmental-friendly fluoride-free waterproof and moisture permeable fibrous membrane is greater than or equal to 30 Mpa, and the fluoride-free waterproof and moisture permeable fibrous membrane can effectively degrade organic pollutants adhering to the surface of the fluoride-free waterproof and moisture permeable fibrous membrane.

Description

technical field [0001] The invention relates to an environmentally friendly fluorine-free waterproof and moisture-permeable fiber membrane with photocatalytic self-cleaning function, in particular to a preparation method of an environmentally friendly fluorine-free waterproof and moisture-permeable fiber membrane with photocatalytic self-cleaning function, which belongs to functional The field of waterproof and moisture-permeable materials. Background technique [0002] The waterproof and moisture-permeable membrane can not only prevent the penetration of liquid water, but also discharge the sweat vapor produced by the human body in time. It is the core material for the manufacture of protective clothing such as field military uniforms and assault jackets. Existing waterproof and moisture-permeable membranes mainly include two types: hydrophilic non-porous membranes and hydrophobic microporous membranes. Hydrophobic microporous membranes have higher moisture permeability an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/643D06M11/46D01F6/38D04H1/728D06M101/28
Inventor 王先锋赵景丁彬俞建勇
Owner DONGHUA UNIV
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