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Nanometer fiber air purifying material with chitosan powder on surface and preparation method of nanometer fiber air purifying material

An air purification material, chitosan nanotechnology, applied in the chemical characteristics of fibers, fiber processing, rayon manufacturing and other directions, can solve the problems of secondary pollution, biodegradability and poor human body affinity, and achieves a The effect of adsorption and filtering effects

Active Publication Date: 2019-03-15
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano silver particles, nano TiO 2 and graphene oxide can be widely used in the field of antibacterial nanofiber filter materials, but the antibacterial materials used are all inorganic materials, which have poor biodegradability and human affinity, and are likely to cause secondary pollution

Method used

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  • Nanometer fiber air purifying material with chitosan powder on surface and preparation method of nanometer fiber air purifying material
  • Nanometer fiber air purifying material with chitosan powder on surface and preparation method of nanometer fiber air purifying material
  • Nanometer fiber air purifying material with chitosan powder on surface and preparation method of nanometer fiber air purifying material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation method of the nanofiber air-purifying material containing chitosan powder on the surface, the specific steps are as follows:

[0039] (1) dissolving PLA particles in a mixed solvent of DCM and DMAC with a mass ratio of 10:1 to obtain a PLA solution with a concentration of 8 wt %;

[0040] (2) adding the chitosan nano powder with a particle size of 100-600nm into the PLA solution and stirring until uniformly dispersed and ultrasonically oscillating for 90 minutes to obtain a spinning solution, wherein the content of the chitosan nano powder in the spinning solution is 3wt% ;

[0041] (3) The nanofiber air purification material containing chitosan powder on the surface is prepared by electrospinning with spunbonded non-woven fabric as the receiving substrate. The process parameters of electrospinning are: spinning temperature 17°C, spinning voltage 18kV, The spinning liquid flow rate is 1.5mL / h, and the receiving distance is 8cm; the receiving device of e...

Embodiment 2

[0047] The preparation method of the nanofiber air-purifying material containing chitosan powder on the surface, the specific steps are as follows:

[0048] (1) dissolving PLA particles in a mixed solvent of DCM and DMAC with a mass ratio of 10:1 to obtain a PLA solution with a concentration of 8 wt %;

[0049] (2) adding the chitosan nano powder with a particle size of 100-600nm into the PLA solution and stirring until uniformly dispersed and ultrasonically oscillating for 90 minutes to obtain a spinning solution, wherein the content of the chitosan nano powder in the spinning solution is 2wt% ;

[0050] (3) The nanofiber air purification material containing chitosan powder on the surface is prepared by electrospinning with spunbonded nonwoven fabric as the receiving substrate. The process parameters of electrospinning are: spinning temperature 20°C, spinning voltage 16kV, The flow rate of the spinning solution is 1mL / h, and the receiving distance is 12cm; the receiving devi...

Embodiment 3

[0057] The preparation method of the nanofiber air-purifying material containing chitosan powder on the surface, the specific steps are as follows:

[0058] (1) dissolving PLA particles in a mixed solvent of DCM and DMAC with a mass ratio of 10:1 to obtain a PLA solution with a concentration of 6 wt %;

[0059] (2) Add the chitosan nanopowder with a particle size of 100-600nm into the PLA solution and stir until uniformly dispersed and ultrasonically oscillate for 60 minutes to obtain a spinning solution, wherein the content of the chitosan nanopowder in the spinning solution is 1.5wt %;

[0060] (3) The nanofiber air purification material containing chitosan powder on the surface is prepared by electrospinning with hot-melt non-woven fabric as the receiving substrate. The process parameters of electrospinning are: spinning temperature 22°C, spinning voltage 18kV, The flow rate of spinning solution is 1.5mL / h, and the receiving distance is 10cm; the receiving device of electr...

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Abstract

The invention relates to a nanometer fiber air purifying material with chitosan powder on the surface and a preparation method of the nanometer fiber air purifying material. The preparation method includes the steps that a spinning solution with the chitosan nanometer powder is used for electrostatic spinning, and with a pre-filtering material being a receiving substrate, the nanometer fiber air purifying material with chitosan powder on the surface is prepared, the solute in the spinning solution with the chitosan nanometer powder is PLA, a solvent is a mixed solvent of DCM and DMAC, and therelative humidity of the environment during electrostatic spinning is 30-60%. The nanometer fiber air purifying material comprises a nanometer fiber membrane layer and a pre-filtering layer which areadjacent and are provided with porous structures, the bore diameter of the pre-filtering layer is larger than that of the nanometer fiber membrane layer, nanometer holes are distributed in nanometer fibers in the nanometer fiber membrane, and the chitosan nanometer powder is embedded into the surfaces of the nanometer fibers. The method is simple in technology, and the prepared nanometer fiber airpurifying material is good in adsorbing and filtering effect and high in antibacterial rate.

Description

technical field [0001] The invention belongs to the field of nanofiber filter materials, and relates to a nanofiber air purification material with chitosan powder on the surface and a preparation method thereof, in particular to a nanofiber air purification material with chitosan powder on the surface and a high antibacterial rate Materials and their preparation methods. Background technique [0002] Air pollution usually refers to the phenomenon that certain substances produced by human activities or natural processes enter the atmosphere and present a sufficient concentration and reach a sufficient time to endanger human comfort, health or the natural environment. With the rapid development of industrialization and urbanization, the problem of air pollution is becoming more and more severe. Large-scale and long-term low-visibility smog often occurs in the central and eastern regions of my country, which has a great impact on people's daily work and life, and even life and ...

Claims

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Application Information

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IPC IPC(8): D04H1/728D01D5/00D01F1/10D01F6/92
CPCD01D5/0007D01D5/003D01F1/103D01F6/92D04H1/728D10B2505/04
Inventor 李惠张海艳潘志娟王玉
Owner SUZHOU UNIV
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