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A high-efficiency and low-resistance staggered nanofiber composite material and its preparation method

A nanofiber and staggered arrangement technology, which is applied in the field of high-efficiency and low-resistance staggered nanofiber composite materials and its preparation, can solve the problems affecting the filtration performance and service life of filter materials, high filtration resistance, etc., and achieve simple preparation methods and low cost. Low cost, high output effect

Active Publication Date: 2018-09-25
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nanofiber filter material obtained by the existing nanofiber preparation method will produce high filtration resistance during the filtration process, which seriously affects the filtration performance and service life of the filter material.

Method used

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  • A high-efficiency and low-resistance staggered nanofiber composite material and its preparation method
  • A high-efficiency and low-resistance staggered nanofiber composite material and its preparation method
  • A high-efficiency and low-resistance staggered nanofiber composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1: Mix dichloromethane and N,N-dimethylacetamide at a mass ratio of 12:1 as a mixed solvent, weigh 0.7g of PLA polymer particles and dissolve them in 9.3g of mixed solvent, Then, a homogeneously mixed transparent solution (PLA solution) with a mass fraction of 7% was prepared by stirring with a magnetic stirrer at room temperature, which was used as a spinning solution for PLA fibers with a porous structure (PLA-P). Add 0.001 mol / L of LiBr into a mixed solvent with a mass ratio of DCM / DMAC of 10:1, and then dissolve a certain mass of solid polymer PLA into the mixed solvent to obtain a 7% LiBr-containing mass fraction The PLA polymer solution (PLA / LiBr solution) was used as the spinning solution for PLA nanofibers (PLA-N).

[0029] Step 2: Inject the PLA solution into 4 syringes placed on one side of the fully automatic traversing receiving drum. The spinning process parameters are: voltage 16kV, spinning solution flow rate 1ml / h, and spinning distance 12cm. At th...

Embodiment 2

[0032]Step 1: Mix dichloromethane and N,N-dimethylacetamide at a mass ratio of 10:1 as a mixed solvent, weigh 0.7g of PLA polymer particles and dissolve them in 9.3g of mixed solvent, Then, a homogeneously mixed transparent solution (PLA solution) with a mass fraction of 7% was prepared by stirring with a magnetic stirrer at room temperature, which was used as a spinning solution for PLA fibers with a porous structure (PLA-P). Add 0.001 mol / L of LiBr into a mixed solvent with a mass ratio of DCM / DMAC of 10:1, and then dissolve a certain mass of solid polymer PLA into the mixed solvent to obtain a 7% LiBr-containing mass fraction The PLA polymer solution (PLA / LiBr solution) was used as the spinning solution for PLA nanofibers (PLA-N).

[0033] Step 2: Inject the PLA solution into 4 syringes placed on one side of the fully automatic traversing receiving drum. The spinning process parameters are: voltage 16kV, spinning solution flow rate 1ml / h, and spinning distance 12cm. At the...

Embodiment 3

[0036] Step 1: Mix dichloromethane and N,N-dimethylacetamide at a mass ratio of 10:1 as a mixed solvent, weigh 0.7g of PLA polymer particles and dissolve them in 9.3g of mixed solvent, Then, a homogeneously mixed transparent solution (PLA solution) with a mass fraction of 7% was prepared by stirring with a magnetic stirrer at room temperature, which was used as a spinning solution for PLA fibers with a porous structure (PLA-P). Add 0.005mol / L LiBr into a mixed solvent with a mass ratio of DCM / DMAC of 10:1, and then dissolve a certain mass of solid polymer PLA into the mixed solvent to obtain a 7% LiBr-containing mass fraction The PLA polymer solution (PLA / LiBr solution) was used as the spinning solution for PLA nanofibers (PLA-N).

[0037] Step 2: Inject the PLA solution into three syringes placed on one side of the fully automatic traverse receiving drum. The spinning process parameters are: voltage 16kV, spinning solution flow rate 1ml / h, and spinning distance 12cm. At the ...

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Abstract

The invention discloses a high-efficiency low-resistance staggered nano-fiber composite and a preparation method thereof. The composite adopts the structure that fibers with the nano-porous surfaces and nano-fibers are staggered. When used for filtering sodium chloride aerosol particles of which the weight median diameters are 260 nm respectively, the composite achieves the air filter efficiency of up to 99.99% or above and the filter resistance of lower than 140 Pa. The preparation method comprises the following steps: combining the nano-fibers of about 100-300 nm and the fibers, of 1.2-1.8 [mu]m, with the nano-porous surfaces in a staggered manner in an electrostatic spinning process by adopting a full-automatic cross-sliding roller receiving device, so as to prepare the composite nano-fiber filter material of which the filter efficiency is high and the resistance is low in a one-step process. The preparation method is simple, high in yield and low in cost; when being used for filtering fine particles, the prepared staggered composite filter material is relatively high in filter efficiency and relatively low in filter resistance; and the prospect of application in the fields of individual protection and air purification is broad.

Description

technical field [0001] The invention relates to an air filter material and a preparation method thereof, in particular to a high-efficiency and low-resistance staggered nanofiber composite material and a preparation method thereof. Background technique [0002] In recent years, the rapid urbanization and industrialization process has led to serious air pollution, which not only caused huge property losses, but also seriously affected people's health and quality of life, especially the particle size suspended in the air is less than 2.5μm Dust particles (PM2.5) are not only an important cause of haze weather, but also one of the main factors leading to respiratory diseases and cardiovascular diseases, so effective protection against them is imminent. Conventional nonwoven materials have been widely used in different fields of the filtration industry, such as glass fiber, polypropylene fiber, meltblown fiber, etc., have been widely used in air purifiers, air conditioning filte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/08B01D46/54
CPCB01D39/083B01D46/543B01D46/546B01D2239/064B01D2258/06
Inventor 王哲潘志娟
Owner SUZHOU UNIV
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