Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Micron fiber/nano fiber composited electret filter material and preparation method thereof

A microfiber and nanofiber technology, applied in filtration and separation, membrane filters, fiber treatment, etc., can solve the problems of reducing the dielectric properties of materials and the impact of long-term charge storage capacity, achieving enhanced charge stability, simple preparation methods, The effect of enhanced charge storage capacity

Active Publication Date: 2017-12-15
DONGHUA UNIV
View PDF9 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The electret filter materials involved in the above patents all use corona discharge or electric breakdown polarization to achieve charge injection, and the electret charge storage capacity and charge stability are still worthy of investigation. Sexual group, easily with the H in the air 2 O forms hydrogen bonds, reduces the dielectric properties of the material, and also affects the long-term charge storage capacity of the material

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
  • Micron fiber/nano fiber composited electret filter material and preparation method thereof
  • Micron fiber/nano fiber composited electret filter material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A microfiber / nanofiber composite electret filter material and a preparation method thereof. The preparation method mainly includes the following steps: 1) uniformly dispersing hydroxyapatite (addition amount 0.5wt%, particle size 0.05 μm) in N,N- In dimethylformamide, a dispersion liquid was formed. After ultrasonic stirring for 0.5 hours, polyvinylidene fluoride (weight average molecular weight: 320,000) was added to the dispersion liquid, and after sealing, it was placed in a 60°C water bath and heated and stirred for 10 hours. Finally, a stable and uniform polymer spinning solution A with a mass concentration of 20wt% is prepared for preparing the nanofiber layer;

[0034] Similarly, hydroxyapatite (addition amount 1wt%, particle size 0.05 μm) was uniformly dispersed in N, N-dimethylformamide to form a dispersion liquid, and after ultrasonic stirring for 0.5 h, polystyrene (weight average The molecular weight is 80,000) into the dispersion, and after sealing, it is c...

Embodiment 2

[0040] A microfiber / nanofiber composite electret filter material and a preparation method thereof. The preparation method mainly includes the following steps: 1) uniformly dispersing hydroxyapatite (0.5wt% added, 0.1μm particle size) in N,N- In dimethylacetamide, a dispersion liquid was formed, and after ultrasonic stirring for 0.5 h, polyvinylidene fluoride (weight average molecular weight: 570,000) was added to the dispersion liquid, and after sealing, it was placed in a 60°C water bath and heated and stirred for 8 hours. Finally, a stable and uniform polymer spinning solution A with a mass concentration of 18wt% is prepared for preparing the nanofiber layer;

[0041] Similarly, hydroxyapatite (addition amount 1wt%, particle size 0.05 μm) was uniformly dispersed in N, N-dimethylformamide to form a dispersion liquid, and after ultrasonic stirring for 0.5 h, polystyrene (weight average The molecular weight is 80,000) into the dispersion, and after sealing, it is continuously s...

Embodiment 3

[0047] A microfiber / nanofiber composite electret filter material and a preparation method thereof. The preparation method mainly includes the following steps: 1) uniformly dispersing polytetrafluoroethylene (addition amount 0.05wt%, particle size 0.2 μm) in N,N- In dimethylacetamide, a dispersion liquid was formed. After ultrasonic stirring for 1 hour, polyvinylidene fluoride (weight-average molecular weight: 570,000) was added to the dispersion liquid. After sealing, put it into a 60°C water bath and heat and stir for 8 hours. Finally, It is prepared into a stable and uniform polymer spinning solution A with a mass concentration of 18wt%, which is used to prepare a nanofiber layer;

[0048] Similarly, polytetrafluoroethylene (addition amount 0.1wt%, particle size 0.2 μm) was uniformly dispersed in N, N-dimethylacetamide to form a dispersion liquid, and after ultrasonic stirring for 0.5 h, polysulfone (weight average The molecular weight is 70,000) into the dispersion, and aft...

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
Particle sizeaaaaaaaaaa
Gram weightaaaaaaaaaa
Aperture sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a micron fiber / nano fiber composited electret filter material and a preparation method thereof. The preparation method is as follows: a micron fiber and nano fiber three dimensional structure composited electret filter material is obtained by forming on a receiving base material in one step by using an annular gradient solvent vapor rapid removing device and a double-area isolation spinning control technique in the electrostatic spinning process. An electret material is evenly distributed in a micron fiber and nano fiber layer of the composited electret filter material, the charge storage capability and the charge stability of the electret material are strengthened under the action of a high voltage electric field, and the electrostatic effect of the composited electret filter material is utilized to effectively improve the filtering efficiency of the filter material. The charge stability of an electret of the micron fiber / nano fiber composited electret filter material is very high, the surface electrostatic potential is 300-8000 V, the filtering efficiency of particles of 0.02-20 [mu]m is greater than or equal to 99.97%, the resistance is less than or equal to 30 Pa, the service life is long, and the prospect of development and application is broad.

Description

technical field [0001] The invention relates to a microfiber / nanofiber composite electret filter material and a preparation method thereof, in particular, through an annular gradient solvent vapor rapid removal device, a dual-area isolation spinning control technology is adopted to form one-step molding on a receiving substrate to obtain micron The invention discloses a three-layer structure electret composite filter material of fibers and nanofibers, which belongs to the field of environmental materials. Background technique [0002] Although traditional filter materials can effectively filter pollutant particles, they usually have a high resistance pressure drop if they want to achieve high filtration efficiency. Therefore, it is difficult to achieve an effective balance between filtration efficiency and pressure resistance only by the structural characteristics of the fiber itself. In addition to conventional physical interception and inertial collision, the introduction ...

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): B01D39/14D01D5/00D01D13/00D04H3/005D04H3/033
CPCB01D39/14B01D2239/10D01D5/003D01D5/0076D01D13/00D04H3/005D04H3/033
Inventor 丁彬廖亚龙李玉瑶赵兴雷蒋攀印霞俞建勇
Owner DONGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com