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Electrostatic spinning nanofiber membrane as well as preparation method thereof

A nanofiber membrane, electrospinning technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve the problems of high cost, complicated process, limited popularization and application, etc., and achieve the effect of high production efficiency and low energy consumption

Inactive Publication Date: 2013-12-11
ZHEJIANG WEIXING IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the waterproof and moisture-permeable fabric represented by the PTFE porous membrane disclosed in the prior art has good waterproof and moisture-permeable performance, its preparation requires special unidirectional or bidirectional stretching equipment, the process is complicated, and the product processing is difficult. High cost, high scrap rate, and high product prices limit its promotion and application to a large extent
[0006] There is no type of fiber membrane in the prior art that can meet the needs of various industries

Method used

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  • Electrostatic spinning nanofiber membrane as well as preparation method thereof
  • Electrostatic spinning nanofiber membrane as well as preparation method thereof
  • Electrostatic spinning nanofiber membrane as well as preparation method thereof

Examples

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preparation example Construction

[0048] The invention provides a method for preparing an electrospun nanofiber membrane, comprising the following steps:

[0049] Dissolving the high melting point polymer in the first spinning solvent to obtain a high melting point polymer spinning solution;

[0050] dissolving the low-melting polymer in the second spinning solvent to obtain a low-melting polymer spinning solution, and the difference between the melting points of the high-melting polymer and the low-melting polymer is not less than 10°C;

[0051] performing first electrospinning on the high-melting-point polymer spinning solution to obtain a high-melting-point polymer fiber membrane;

[0052] performing second electrospinning on the low-melting-point polymer spinning solution to obtain a low-melting-point polymer fiber membrane;

[0053] The high-melting-point fiber membrane and the low-melting-point fiber membrane are combined and hot-pressed to obtain an electrospun nanofiber membrane. The temperature of th...

Embodiment 1

[0079]Dry the PET powder and PVDF powder in a vacuum oven at 110°C for 12 hours, then cool to room temperature, weigh 100g of the dried PET powder and dissolve it in a mixed solvent of 700g of trifluoroacetic acid and dichloromethane, and stir at room temperature for 12h. Obtain a transparent PET organic solution; add 1 g of nano-silica particles to the obtained PET organic solution, and ultrasonically disperse the obtained mixed solution for 6 hours to obtain a PET spinning solution for subsequent use;

[0080] Weigh 100g of dry PVDF powder and dissolve in 400g of N,N-dimethylformamide and acetone mixed solvent, stir at room temperature for 12h to obtain PVDF spinning solution, set aside;

[0081] The viscosity of the obtained spinning solution was measured to be 5.1 Pa·s, and then the PET spinning solution and the PVDF spinning solution were spun through a high-voltage electrospinning machine at a room temperature of 25°C and a relative air humidity of about 30%. During the ...

Embodiment 2

[0087] Dissolve 80g of dried polyvinylidene fluoride (PVDF) in a mixed solvent of 126g N,N-dimethylformamide (DMF) and 294g of acetone, and stir the resulting solution at room temperature for 12 hours to obtain a transparent and uniform PVDF spinning silk solution, spare;

[0088] Dissolve 80g of vacuum-dried polyethersulfone (PES) in 420g of DMF solvent, and stir and dissolve the resulting mixture in an oil bath for 12 hours to obtain a transparent and uniform PES spinning solution;

[0089] After measuring the viscosity of the spinning solution, the obtained PVDF spinning solution and PES spinning solution were mixed and cross-spun through a high-voltage electrospinning machine at a room temperature of 25°C and a relative air humidity of about 35%. During the electrospinning process of PVDF spinning solution, each Taylor cone feeding (feeding) solution speed was 2.0mL / h, the spinning voltage was 45kV, and the receiving distance was 25cm. During the electrospinning process o...

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Abstract

The invention provides an electrostatic spinning nanofiber membrane as well as a preparation method thereof. The electrostatic spinning nanofiber membrane provided by the invention comprises a fiber membrane obtained by electrostatically spinning a high-melting-point polymer and a fiber membrane obtained by electrostatically spinning a low-melting-point polymer, wherein the difference on the melting points of the high-melting-point polymer and the low-melting-point polymer is not less than 10 DEG C. The electrostatic spinning nanofiber membrane provided by the invention is multipurpose and can be applied to the fields such as biomedicines, energy and chemical industry, gas and liquid filtration, waterproofness and windproofness, windproofness and heat insulation, moisture permeability and ventilation, environmental management and semiconductor sensors. According to the electrostatic spinning nanofiber membrane provided by the invention, electrostatic spinning is respectively carried out on the high-melting-point polymer and the low-melting-point polymer, and the high-melting-point polymer fiber membrane and the low-melting-point polymer fiber membrane obtained are composited and hot-pressed to obtain the electrostatic spinning nanofiber membrane. The preparation method provided by the invention is high in production efficiency and low in energy consumption, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of electrospinning, in particular to a nanofiber film suitable for electrospinning and a preparation method thereof. Background technique [0002] With the rapid development of industry, people have higher requirements for living environment and living comfort, while environmental pollution and energy reduction have become increasingly serious problems. At the same time, people's life and production have high requirements for air and liquid. . At present, existing technologies are accelerating research on environmental governance, new energy development, semiconductor industry and biomedicine. [0003] In order to meet the above needs, for example: in terms of gas and liquid filtration, many polymer materials are used to make filter membrane materials, and many of them are commercialized such as polytetrafluoroethylene, polyphenylene sulfide, polyester fiber, and acetate fiber. However, the current product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/559D04H1/728D04H1/558
Inventor 刘延波陈国贵刘艳新宋学礼
Owner ZHEJIANG WEIXING IND DEV
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