High-adsorption nanofiber composite filter material and preparation method thereof

A nanofiber and composite filtration technology, which is applied in the field of textile materials, can solve the problems of low specific surface area and porosity, easy shedding of active particles, and difficult fiber diameter to reach the nanometer level, etc., to achieve excellent flexibility and plasticity, dense tissue structure, The effect of excellent filtration performance

Active Publication Date: 2014-09-03
武汉维晨科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the above example is that the active particles and fibers are compounded in the subsequent steps, the dispersion uniformity of the active particles is not easy to control, and the active particles are easy to fall off during use, which affects the mechanical stability and use of the entire filter net. life
[0008] The disadvantage of the above example is that the fiber is prepared by ordinary melt spinning method, and the fiber diameter is difficult to reach the nanometer level. Compared wit

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0044] A method for preparing a high-adsorption nanofiber composite filter material, the preparation method is carried out according to the following steps:

[0045] a. The active particulate material is subjected to high-speed ball milling in a ball mill with a process temperature of 20-50°C to prepare nano-active particles with a diameter of 1-50 nm.

[0046] b. According to mass percentage of the nano active particles and thermoplastic polymer obtained in step a:

[0047] Thermoplastic polymer 70~99%

[0048] Nano active particles 1~30%

[0049] Uniform mixing and drying are carried out, extrusion and granulation are carried out in a twin-screw extruder with a processing temperature of 130-270 DEG C, to prepare nano active particles / thermoplastic polymer composite materials.

[0050] c Combine the nano-active particle / thermoplastic polymer composite material and cellulose acetate butyrate obtained in step b by mass percentage:

[0051] Nano active particles / thermoplastic polymer compos...

Example Embodiment

[0058] Example 1

[0059] The 0.1Kg activated carbon particles were subjected to high-speed ball milling in a ball mill at a temperature of 30°C to obtain nanometer activated carbon particles with an average diameter of 20nm, and then mixed with 1KgPVA-co-PE masterbatch uniformly and dried. Extrude and pelletize in the extruder to prepare 1.1Kg nano activated carbon particles / PVA-co-PE composite material; then 1.1Kg composite material and 4.4Kg cellulose acetate butyrate (CAB) are uniformly mixed , Extrude and pelletize in a twin-screw extruder with a temperature of 170℃ to prepare 5.5Kg nanometer activated carbon particles / PVA-co-PE / CAB composite material, and then use the melt spinning machine to make this composite material Spinning to obtain composite fibers; the composite fibers are refluxed in acetone at 60° C. for 72 hours to extract cellulose acetate butyrate, and the composite fibers after extraction of cellulose acetate butyrate are dried at room temperature to prepare ...

Example Embodiment

[0060] Example 2

[0061] The 0.2Kg silica particles were subjected to high-speed ball milling in a ball mill at a temperature of 40°C to obtain nano-silica active particles with an average diameter of 30nm, which were then mixed with 1KgPP masterbatch uniformly and dried, and carried out in a twin-screw extruder at a temperature of 140°C. Extrusion and granulation to prepare 1.2Kg nano silica active particles / PP composite material; then 1.2Kg composite material and 9.6Kg cellulose acetate butyrate (CAB) are uniformly mixed, and the temperature is 140 ℃ twin screw Extrusion and granulation are carried out in the extruder to prepare 10.8Kg of nano silica active particles / PVA-co-PE / CAB composite material, and then the composite material is spun on a melt spinning machine to obtain composite fibers; The fiber was refluxed in acetone at 60°C for 72 hours to extract cellulose acetate butyrate, and the composite fiber after cellulose acetate butyrate extraction was dried at room temper...

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Abstract

The invention relates to a high-adsorption nanofiber composite filter material which comprises a non-woven base material and a nanofiber membrane applied to the surface of the non-woven base material, wherein nanofibers forming the nanofiber membrane comprise continuous-phase thermoplastic polymers and disperse-phase active nanoparticles. A preparation process of the composite filter material comprises the steps of performing double-screw extruding and granulating on the active nanoparticles and the thermoplastic polymers according to a ratio to prepare a composite material; mixing the composite material with cellulose acetate butyrate according to a ratio, performing melt spinning, and performing solvent extraction to prepare thermoplastic nanofibers containing the active nanoparticles; finally, coating the surface of the non-woven base material with ethanol suspension of the thermoplastic nanofibers, and drying to obtain the high-adsorption nanofiber composite filter material. The preparation process is simple, the cost is low, the energy consumption is low, and the yield is high. The thermoplastic nanofibers containing the active nanoparticles are dense in tissue structure and controllable in diameter. The composite filter material has the characteristics of stable structural performance and excellent adsorption filtration performance.

Description

technical field [0001] The invention relates to a high-adsorption nanofiber composite filter material and a preparation method thereof, belonging to the technical field of textile materials. technical background [0002] Nanofiber is a kind of ultrafine fiber, which has the characteristics of large specific surface area, large aspect ratio and easy film formation. It is widely used in the fields of medicine, food, industry and household, especially as a filter material for air and water treatment. [0003] The nanofiber membrane material has a very small pore size and can intercept extremely fine particles in air and water. The existing method mainly improves the filtration efficiency of nanofiber membranes for particulate matter by changing the process conditions to reduce the fiber diameter and increase the membrane thickness. However, this method will reduce the output rate of clean water and clean air. Improving the adsorption performance of the fiber membrane itself ca...

Claims

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Application Information

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IPC IPC(8): B01D39/14B32B27/08
Inventor 王栋刘轲李沐芳刘琼珍马鹏飞肖钻
Owner 武汉维晨科技有限公司
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