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Method for preparing high-efficiency filtration and intelligent antibacterial porous nanofiber membrane

A nanofiber membrane, high-efficiency filtration technology, applied in filtration and separation, fiber treatment, separation methods, etc., can solve the problems of fiber morphology damage, increased process difficulty, and difficulty in industrialized production, achieving low resistance, good filtration effect, The effect of promoting swelling and water absorption

Active Publication Date: 2019-03-15
山东蓝色时光新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires subsequent calcination treatment, which not only increases the difficulty of the process, is not easy for industrial production, but also causes damage to the morphology of the fiber, and the obtained inorganic fiber material has poor flexibility and affects the mechanical properties of the porous fiber.

Method used

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  • Method for preparing high-efficiency filtration and intelligent antibacterial porous nanofiber membrane
  • Method for preparing high-efficiency filtration and intelligent antibacterial porous nanofiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of Example 1 Porous Nanofiber Membrane A

[0026] figure 1 Shown is the SEM image of the porous nanofibers prepared in Example 1.

[0027] PLGA and PCL are dissolved in a mixed solvent of dichloromethane and N.N dimethylformamide according to a mass ratio of 1:1, and the mass fraction of the polymer is 10%; wherein N.N dimethylformamide accounts for 5% of the mixed solvent mass , Stir well, then divide into two bottles, add 3% citric acid to one bottle of solution, add 3% sodium chlorite to the other bottle of solution, and then stir to make it disperse evenly. Adding 2% polyvinyl alcohol microspheres to the two solutions is beneficial to promote the expansion of nanofibers to absorb water and accelerate the reaction; then the solution is at a spinning voltage of 30kv, the spinning distance is 12cm, and the flow rate of the micro-injection pump is 200ml / h at a temperature of 25° C. and a relative humidity of 60% for a period of electrospinning to obtain a...

Embodiment 2

[0028] Preparation of Example 2 Porous Nanofiber Membrane B

[0029] Dissolve PLGA and PCL in dichloromethane according to the mass ratio of 1:2, the mass fraction of the polymer is 11%, fully stir evenly, and then divide into two bottles, add 5% citric acid to the solution in one bottle, and add 5% citric acid in the other bottle Add 4% sodium chlorite and stir to make it evenly dispersed. Adding 3% polyvinyl alcohol microspheres to the two solutions is beneficial to promote the swelling and water absorption of nanofibers and accelerate the reaction; then the solution is at a spinning voltage of 40kv, the spinning distance is 15cm, and the flow rate of the micro-injection pump is 300ml / h at a temperature of 25° C. and a relative humidity of 70% for a period of electrospinning to obtain a porous nanofibrous membrane B. The average diameter of the porous nanofiber is 700nm, and the pore size range is 80-200nm. The intelligent antibacterial efficiency is 98.5%. At an ambient ...

Embodiment 3

[0030] Preparation of Example 3 Porous Nanofiber Membrane C

[0031] Dissolve PLGA and PCL in dichloromethane and N.N dimethylformamide according to the mass ratio of 2:1, the polymer mass fraction is 10%; wherein N.N dimethylformamide accounts for 4% of the mass of the mixed solvent, stir well Evenly, then divide into two bottles, add 9% citric acid to one bottle of solution, add 4% sodium chlorite to the other bottle of solution, and then stir to make it disperse evenly. Adding 2% polyvinyl alcohol microspheres to the two solutions is beneficial to promote the expansion and absorption of nanofibers and accelerate the reaction; then the solution is at a spinning voltage of 50kv, the spinning distance is 20cm, and the flow rate of the micro-injection pump is 500ml / h at a temperature of 25° C. and a relative humidity of 75% for a period of electrospinning to obtain a porous nanofibrous membrane C. The average diameter of the porous nanofiber is 300nm, and the pore size range ...

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Abstract

The invention discloses a method for preparing a high-efficiency filtration and intelligent antibacterial porous nanofiber membrane. A polymer polylactic acid-glycolic acid copolymer and polycaprolactone are dissolved in a mixed solvent of dichloromethane and N.N-dimethylformamide, a dissolved solution is then divided into two portions, citric acid and sodium chlorite are separately added and stirred uniformly to prepare two different solutions, and polyvinyl alcohol microspheres are added in the two different solutions to prepare two different polymer solutions; the above two polymer solutions are separately added to an electrospinning machine storage tank, and the two different polymer solutions are simultaneously spun to obtain a mutually interlaced and entangled porous nanofiber membrane. The porous nanofiber membrane has the advantages of high-efficiency filtration and ultra-low resistance, and the filter membrane has better filtering effect and lower resistance in fields of air filtration, fresh air system, wastewater treatment and the like. The method is simple, efficient and easy to industrialize.

Description

technical field [0001] The invention relates to a preparation method of a highly efficient filtering and intelligent antibacterial porous nanofiber membrane and the porous nanofiber membrane prepared by the method, belonging to the technical field of new nanofiber materials. Background technique [0002] The rapid economic development has brought about environmental pollution. Smog has become the norm, seriously endangering our health. Facing the current severe air pollution situation, high-performance fiber-based air filter materials are used to filter polluted air to ensure human health and smooth production. Among the existing fiber-based air filter materials, nanofiber air filter materials based on electrospinning technology have the structural advantages of fine diameter, small pore size, and high porosity, and have become the focus and focus of current research in the field of air filtration. [0003] Chinese invention patent (201110371537.5) discloses a preparation m...

Claims

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Application Information

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IPC IPC(8): D04H1/4382D04H1/728D01D5/00B01D39/08D01F8/14D01F1/10
CPCB01D39/083D01D5/003D01D5/0061D01D5/0092D01F1/10D01F8/14D04H1/4382D04H1/728
Inventor 张淼高冬梅朱传武温明昊
Owner 山东蓝色时光新材料有限公司
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