Waterproof polyvinyl alcohol nanofiber membrane and preparation method thereof

A nanofiber membrane, polyvinyl alcohol technology, used in heating/cooling fabrics, textiles and papermaking, fabric surface trimming, etc., can solve the problem of poor water resistance of polyvinyl alcohol nanofibers, improve polyvinyl alcohol nanofibers, and cannot mask filter materials Use and other problems to achieve the effect of improving spinning efficiency, no toxic side effects, and improving water resistance

Active Publication Date: 2016-06-08
刘丽娟
View PDF8 Cites 19 Cited by
  • 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 al

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Waterproof polyvinyl alcohol nanofiber membrane and preparation method thereof
  • Waterproof polyvinyl alcohol nanofiber membrane and preparation method thereof
  • Waterproof polyvinyl alcohol nanofiber membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] A method for preparing polyvinyl alcohol nanofibers with excellent water resistance includes the following steps:

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

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

[0033] 3) After the spinning is completed, the polyvinyl alcohol nanofiber membrane is placed in a blast drying oven at 150°...

Example Embodiment

[0035] Example 2

[0036] A method for preparing polyvinyl alcohol nanofibers with excellent water resistance includes the following steps:

[0037] 1) First, add 18 parts by weight of acetic acid and 8.5 parts by weight of ethanol to 100 parts by weight of water to prepare a mixed solvent, and 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 in sequence, Stir mechanically at 85°C for 5 hours and configure it into a spinning stock solution.

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

[0039] 3) After the spinning is completed, ...

Example Embodiment

[0040] Example 3

[0041] A method for preparing polyvinyl alcohol nanofibers with excellent water resistance includes the following steps:

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

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

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Login to view more

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 thereof. Background technique [0002] With the rapid development of nanomaterials, nanofiber preparation technology, especially electrospinning technology, has been greatly developed. At present, nanofiber filter materials that have been marketed include polyvinylidene fluoride (PVDF), polyacrylonitrile (PAN), nylon 6 (PA6) and other materials, the electrospinning process needs to use organic solvents such as dimethylformamide (DMF) and dimethyl sulfoxide (DMSO). Electrospinning is carried out under high pressure, which may generate electric sparks, and organic solvents are volatile, and may cause explosions under poor ventilation. Moreover, organic solvents pollute the environment a lot, and a solvent recovery device is required in the production process, and the cost is relatively high. Organic solvents still remain in the n...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): D04H1/4309D04H1/728D06C7/00
CPCD04H1/4309D04H1/728D06C7/00D10B2505/04
Inventor 刘丽娟
Owner 刘丽娟
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap