Micron fiber three-dimensional framework/polymer nanofiber composite filter material and preparation method thereof

A nanofiber, three-dimensional skeleton technology, applied in the field of textile materials, can solve the problems of complex preparation process and difficult control of material structure, and achieve the effects of easy availability of raw materials, low cost, and good structure controllability

Active Publication Date: 2017-09-08
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the airgel material described in this invention has the problems of complicated preparation process and difficult control of the material structure.

Method used

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  • Micron fiber three-dimensional framework/polymer nanofiber composite filter material and preparation method thereof
  • Micron fiber three-dimensional framework/polymer nanofiber composite filter material and preparation method thereof
  • Micron fiber three-dimensional framework/polymer nanofiber composite filter material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) dispersing ethylene-vinyl alcohol nanofibers with an average diameter of 150nm in deionized water containing tert-butanol, and stirring at a high speed with a high-speed mixer to form a nanofiber suspension;

[0028] (2) put 110g / m 2 The pure cotton spunlace non-woven fabric is completely soaked in the nanofiber suspension in step (1); (3) is frozen at -15°C for 1.5h to solidify, and the solvent is removed by freeze-drying to obtain pure Cotton spunlace / ethylene vinyl alcohol composite filter material.

[0029] The mass fraction of the suspension described therein is 1.1%, and the mass ratio of tert-butanol to deionized water is 60:40. The nanofiber layer gram weight of the composite filter material that is made is 7g / m 2 ; Nanofibers and non-woven fibers are strengthened by physical entanglement, and the performance indicators are shown in Table 1.

Embodiment 2

[0033] (1) Nylon 6 nanofibers with an average diameter of 220nm are dispersed in a polyacrylic acid solution containing a mixed solvent of formic acid and ethanol, and a nanofiber suspension is formed through a high-speed mixer;

[0034] (2) Put 130g / m 2 PP needle punched non-woven fabric is completely soaked into the nanofiber nanofiber suspension;

[0035] (3) Freeze at -100°C for 5 hours to make it solidify, and use freeze-drying to remove the solvent, and then dry at 80°C for 5 minutes to chemically cross-link to obtain PP acupuncture / nylon 6 nanofiber composite filter material .

[0036] The mass fraction of the suspension described therein is 0.9%, and the mass ratio of formic acid and ethanol is 25:75. The weight of the nanofiber layer of the composite filter material is 13g / m 2 ; Nanofibers and non-woven fibers are strengthened by physical entanglement and chemical crosslinking, and the performance indicators are shown in Table 1.

Embodiment 3

[0040] (1) The polyethylene terephthalate nanofibers with an average diameter of 170nm are dispersed in a polyvinyl alcohol solution containing methylene chloride and trifluoroacetic acid mixed solvent, and are stirred at a high speed by a high-speed mixer to form a nanofiber suspension, Make it cross-linked at 30°C;

[0041] (2) put 200g / m 2 PP needle punched non-woven fabric is completely soaked into the nanofiber suspension;

[0042] (3) Freeze at -80°C for 4 hours to make it solidify, and use a freeze-drying method to remove the solvent to obtain a PP needle-punched / polyethylene terephthalate nanofiber composite filter material.

[0043] The suspension mass fraction described therein is 0.7%, the mass ratio of dichloromethane and trifluoroacetic acid is 75:25, and the nanofiber layer gram weight of the composite filter material is 11g / m 2 . Nanofibers and nonwoven fibers are strengthened by physical entanglement and physical crosslinking, and the performance indicators ...

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Abstract

The invention belongs to the field of textile materials and discloses a micron fiber three-dimensional framework/polymer nanofiber composite filter material and a preparation method thereof. The preparation method comprises the following steps: preparing polymer nanofibers by adopting a melt blending method; dispersing the polymer nanofibers and a crosslinking agent into a solvent to form a suspension, then soaking micron fiber nonwoven fabric skeletons into the suspension, carrying out freeze drying to form coagulation blocks, and then removing the solvent, so that a nonwoven material with polymer nanofiber aerogel gradiently distributed among the micron fiber nonwoven fabric skeletons is obtained. According to the invention, the adopted preparation technology is simple, raw materials are environment-friendly, conditions are mild, the composite filter material is applicable to industrialized mass production, and the composite filter material product has good flexibility as well as high efficiency and low resistance air filtration performance and can be applied to the field of efficient air purification.

Description

technical field [0001] The invention belongs to the field of textile materials, and in particular relates to a micron fiber three-dimensional skeleton / polymer nanofiber composite filter material and a preparation method thereof. Background technique [0002] In recent years, my country's industrialization has developed rapidly, and the speed of urbanization has continued to accelerate. Various pollution problems have emerged one after another, among which air pollution has become a major problem of current environmental pollution. Factory exhaust gas, vehicle exhaust, construction dust, and residential life emit a large number of soot particles, and these particles also provide bacteria with a carrier for growth and reproduction. This not only affects people's travel but also endangers people's health. Therefore, designing and preparing filter materials that can effectively block fine dust particles in the air and have excellent antibacterial properties is a major issue rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16
CPCB01D39/1607B01D2239/10B01D2239/1291
Inventor 刘轲王栋易志兵程盼陈佳慧刘琼珍李沐芳鲁振担蒋海青郭启浩
Owner WUHAN TEXTILE UNIV
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