Nanofiber composite membrane with base material and preparation method thereof

A nanofiber and nanofiber layer technology is applied in the field of nanofiber composite membrane with base material and its preparation, which can solve the problems of sacrificing filtration flux and flow rate, destroying the structure of electrospinning fiber, etc. The effect of large surface area and improved service life

Pending Publication Date: 2020-04-28
HANGZHOU DEEFINE FILTRATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the laminated composite process combines materials with various functions by bonding, which is an effective means to obtain multifunctional composite fabrics, but the laminated heat treatment process will destroy the fiber structure of electrospinning, Thus sacrificing its filtration flux and flow rate

Method used

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  • Nanofiber composite membrane with base material and preparation method thereof
  • Nanofiber composite membrane with base material and preparation method thereof
  • Nanofiber composite membrane with base material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The nanofiber composite membrane of this embodiment uses a polyvinylidene fluoride microfiltration membrane with a filtration accuracy of 0.45 μm as a substrate, and a polyvinylidene fluoride nanofiber layer is compounded on its surface. The specific steps are as follows:

[0030] Pretreatment: on the substrate microfiltration membrane according to 12mL / m 2 The amount of spraying, through the high-pressure atomization nozzle to spray micro-nano-level N-methylpyrrolidone, let it stand for 5s, let N-methylpyrrolidone fully corrode the surface of the substrate microfiltration membrane, and obtain the pretreated substrate microfiltration membrane .

[0031] Preparation of spinning solution:

[0032] (1) Measure N,N-dimethylformamide and N,N-dimethylacetamide respectively according to the volume ratio of 8:2, stir and mix them evenly to obtain a formacetamide mixed solution.

[0033] (2) According to the ratio of volume ratio of 7:3, measure the formacetamide mixed solutio...

Embodiment 2

[0044] The nanofiber composite membrane of this example uses a polyethersulfone microfiltration membrane with a filtration accuracy of 0.45 μm as the substrate, and a layer of polyethersulfone nanofiber layer is compounded on its surface. The specific steps are as follows:

[0045] Pretreatment: on the substrate microfiltration membrane according to 15mL / cm 2 Spray the amount of spraying, spray micro-nano-scale N-methylpyrrolidone through the high-pressure atomizing nozzle, let it stand for 8s, let the N-methylpyrrolidone fully corrode the surface of the substrate microfiltration membrane, and obtain the pretreated substrate microfiltration membrane .

[0046] Preparation of spinning solution:

[0047] (1) Measure N,N-dimethylformamide and N,N-dimethylacetamide respectively according to the volume ratio of 8:2, stir and mix evenly to obtain a formacetamide mixed solution.

[0048] (2) Take formaldehyde mixed solution and acetone respectively according to volume ratio of 9:1,...

Embodiment 3

[0058] The nanofiber composite membrane of this example uses a polyvinylidene fluoride microfiltration membrane with a filtration accuracy of 0.22 μm as the substrate, and a layer of polyethersulfone nanofiber layer is compounded on its surface. The specific steps are as follows:

[0059] Pretreatment: to the substrate microfiltration membrane according to 10mL / m 2 The amount of spraying, through the high-pressure atomizing nozzle to spray micro-nano-level N-methylpyrrolidone, let it stand for 10s, let N-methylpyrrolidone fully corrode the surface of the substrate microfiltration membrane, and obtain the pretreated substrate microfiltration membrane .

[0060] Preparation of spinning solution:

[0061] (1) Measure N,N-dimethylformamide and N,N-dimethylacetamide respectively according to the volume ratio of 8:2, stir and mix evenly to obtain a formacetamide mixed solution.

[0062] (2) Measure the formaldehyde-acetamide mixed solution and acetone respectively according to the...

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Abstract

The invention discloses a nanofiber composite membrane with a base material and a preparation method thereof, and relates to the technical field of nanofiber membranes. According to the method, micro-etching liquid is sprayed on a base material micro-filtration membrane to obtain a pretreated base material micro-filtration membrane, then at least one nanofiber layer is compounded on the surface ofthe pretreated base material micro-filtration membrane through electrostatic spinning, finally, the nanofiber composite membrane is obtained through two times of water bath cleaning and drying, and the nanofiber composite membrane is rolled up. According to the nanofiber composite membrane and the preparation method, electrostatic spun nanofibers can be tightly combined with the base material microfiltration membrane by pretreating the base material microfiltration membrane, and the prepared nanofiber composite membrane is good in filtering efficiency and greatly prolonged in service lifetime.

Description

technical field [0001] The invention relates to the technical field of nanofiber membranes, in particular to a nanofiber composite membrane with a substrate and a preparation method thereof. Background technique [0002] A composite material is a multiphase solid material composed of two or more substances with different physical and chemical properties. Although each component in the composite material maintains its relative independence, the properties of the composite material are not simply the sum of the properties of each component, but on the basis of maintaining certain characteristics of each component material, there is a synergy between the components. The resulting overall performance. [0003] The nanofibers prepared by electrospinning have excellent properties such as fine fiber structure, large specific surface area, high porosity, flexibility, adsorption and filterability. Due to the limitation of machine production efficiency, most nanofiber filter material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/34B01D71/68B01D65/02B01D67/00D01F6/12
CPCB01D69/12B01D71/34B01D71/68B01D65/02B01D67/0002D01F6/12
Inventor 李圣泉王文富冯建永
Owner HANGZHOU DEEFINE FILTRATION TECH
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