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A kind of water resistance polyvinyl alcohol nanofiber film and preparation method thereof

A technology of nanofiber film and polyvinyl alcohol, which is applied in the direction of heating/cooling fabrics, textiles and papermaking, fabric surface trimming, etc., can solve the problem of improving polyvinyl alcohol nanofibers, polyvinyl alcohol nanofibers with poor water resistance, and unable to filter materials for masks Use and other problems to achieve the effect of improving spinning efficiency, no toxic side effects, and improving water resistance

Active Publication Date: 2018-03-13
刘丽娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although polyvinyl alcohol (PVA) materials are easy to process, environmentally friendly, and have excellent performance, the water resistance of polyvinyl alcohol nanofibers is poor. When used as a filter material, the presence of water vapor will cause polyvinyl alcohol nanofibers to absorb water and swell or even dissolve. Make it impossible to use as mask filter material or water filter material
At present, there is no report or technology that can improve the water resistance of polyvinyl alcohol nanofibers simply and efficiently.

Method used

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  • A kind of water resistance polyvinyl alcohol nanofiber film and preparation method thereof
  • A kind of water resistance polyvinyl alcohol nanofiber film and preparation method thereof
  • A kind of water resistance polyvinyl alcohol nanofiber film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] A preparation method of polyvinyl alcohol nanofibers with excellent water resistance, comprising the following steps:

[0031] 1) First, add 5 parts by weight of formic acid to 100 parts by weight of water to prepare a mixed solvent, then add 8.5 parts by weight of polyvinyl alcohol PVA1799 and 3.2 parts by weight of glutaraldehyde in sequence, and mechanically stir at 80°C for 3 hours to configure a spinning stock solution.

[0032] 2) Use a 20mL needle tube to absorb the feed liquid, cover with a 0.8mm inner diameter needle, and squeeze out air bubbles; use the needle tube as the positive electrode and the tin foil (15cm*30cm) as the negative electrode, start spinning, and the spinning conditions are: 15 ℃; relative humidity 50 -55%; spinning voltage 20KV; spinning current 0mA; bolus injection speed 1mL / min; needle plate distance 17.8cm.

[0033] 3) After the spinning is completed, the polyvinyl alcohol nanofiber membrane is placed in a blast drying oven for drying at...

Embodiment 2

[0036] A preparation method of polyvinyl alcohol nanofibers with excellent water resistance, comprising the following steps:

[0037] 1) at first add the ethanol of 18 parts by weight of acetic acid and 8.5 parts by weight in 100 parts by weight of water, configure mixed solvent, then add 11.5 parts by weight of polyvinyl alcohol PVA1799, 1.6 parts by weight of glutaraldehyde and 0.3 parts by weight of ammonium persulfate are added successively, Mechanical stirring was carried out at 85°C for 5h, and the spinning stock solution was configured.

[0038] 2) Use a 20mL needle tube to absorb the feed liquid, cover with a 0.8mm inner diameter needle, and squeeze out air bubbles; use the needle tube as the positive electrode and the tin foil paper (15cm*30cm) as the negative electrode, start spinning, and the spinning conditions are: 18 ℃; relative humidity 50 -55%; spinning voltage 20KV; spinning current 0mA; bolus injection speed 1.1mL / min; needle plate distance 18cm.

[0039] 3)...

Embodiment 3

[0041] A preparation method of polyvinyl alcohol nanofibers with excellent water resistance, comprising the following steps:

[0042] 1) First, add 20 parts by weight of propionic acid to 100 parts by weight of water to configure a mixed solvent, then add 14 parts by weight of polyvinyl alcohol PVA1799 in sequence, and stir mechanically for 4 hours at 90°C to configure a spinning stock solution.

[0043] 2) Use a 20mL needle tube to absorb the feed liquid, cover with a 0.8mm inner diameter needle, and squeeze out air bubbles; use the needle tube as the positive electrode and the tin foil paper (15cm*30cm) as the negative electrode, and start spinning. The spinning conditions are: 20°C; relative humidity 50 -55%; spinning voltage 20KV; spinning current 0mA; bolus injection speed 1.1mL / min; needle plate distance 18cm.

[0044] 3) Put the polyvinyl alcohol nanofiber membrane obtained in step 3) into a YN-280 glutaraldehyde fumigation cabinet (Yaohua Medical Equipment Factory), ca...

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Abstract

The invention discloses a polyvinyl alcohol nanofiber membrane good in water resistance and a preparation method thereof. In the method, ionized water, organic acid, alcohols, polyvinyl alcohol, a crosslinking agent and a catalyst serve as main raw materials for electrostatic spinning solution; and the degree of crosslinking of the polyvinyl alcohol nanofiber membrane is improved through heat treatment after electrostatic spinning. A disclosed process is green and environmentally friendly. Compared with a conventional nanofiber filtering material, the polyvinyl alcohol nanofiber membrane is free of solvent recovery and solvent residue problems and free of toxic and side effect, and the prepared polyvinyl alcohol nanofiber membrane has excellent water resistance and can serve as a medical dressing or an air filtering material.

Description

technical field [0001] The invention relates to the field of new chemical materials, in particular to a nanofiber membrane and a preparation method. Background technique [0002] With the rapid development of nanomaterials, nanofiber preparation technology, especially electrospinning technology, has made great progress. At present, nanofiber filter materials that have been marketed include polyvinylidene fluoride (PVDF), polyacrylonitrile (PAN), nylon 6 (PA6) and other materials, the electrospinning process requires the use of organic solvents such as dimethylformamide (DMF) and dimethyl sulfoxide (DMSO). Electrospinning is carried out under high pressure, which may generate electric sparks, while organic solvents are volatile and may cause explosions in poor ventilation. In addition, organic solvents pollute the environment greatly, and the production process needs to be equipped with a solvent recovery device, and the cost is relatively high. There are still organic solv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4309D04H1/728D06C7/00
CPCD04H1/4309D04H1/728D06C7/00D10B2505/04
Inventor 刘丽娟
Owner 刘丽娟