Preparation method of air filtering nanofiber membrane with dendritic multilevel structure

A nanofiber membrane and air filtration technology, which is applied in fiber treatment, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of single function of air filtration nanofiber membrane and low coverage of dendritic structure, and achieve improved splitting Excellent branching ability, remarkable bactericidal effect, and stable performance

Active Publication Date: 2021-09-24
CHANGZHOU TEXTILE GARMENT INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been reports on the preparation of air filtration nanofiber membranes with dendritic PVDF multi-level structure by adding various salts, but the coverage of dendritic structures produced by these preparation methods is not high, and the function of air filtration nanofiber membranes is single

Method used

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  • Preparation method of air filtering nanofiber membrane with dendritic multilevel structure
  • Preparation method of air filtering nanofiber membrane with dendritic multilevel structure
  • Preparation method of air filtering nanofiber membrane with dendritic multilevel structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Take 8ml of dimethylacetamide and 2ml of acetone, and prepare a composite organic solvent system with a ratio of 8:2; according to the mass concentration of 12%, weigh 1.3g of polyvinylidene fluoride (PVDF) and add it to the composite In an organic solvent, and at a water bath temperature of 80°C, stir magnetically for 3 hours to obtain a colorless and transparent spinning solution; take 0.32g of amino-terminated hyperbranched compound quaternary ammonium salt (HBP-HTC) and add polyvinylidene fluoride (PVDF) for spinning In the liquid, under the temperature of 80 ℃ water bath, magnetically stir for 5 hours to obtain a homogeneous spinning solution; the spinning solution is left to stand for 1 hour to defoam. Under the conditions of 25cm, ambient temperature 30°C, and ambient humidity 30%, electrospinning is performed to obtain an air-filtering nanofiber membrane with good filtering effect, high-efficiency antibacterial, and rich dendritic multi-level structure...

Embodiment 2

[0043] Example 2: Take 7ml of dimethylacetamide and 3ml of acetone, and prepare a composite organic solvent system with a ratio of 7:3; according to the mass concentration of 10%, weigh 1.0g of polyvinylidene fluoride (PVDF) and add it to the composite In an organic solvent, and at a water bath temperature of 80°C, stir magnetically for 3 hours to obtain a colorless and transparent spinning solution; take 0.28g of amino-terminated hyperbranched compound quaternary ammonium salt (HBP-HTC) and add polyvinylidene fluoride (PVDF) for spinning In the liquid, under the temperature of 80 ℃ water bath, magnetically stir for 5 hours to obtain a homogeneous spinning solution; the spinning solution is left to stand for 1 hour to defoam. Under the conditions of 20cm, ambient temperature 30°C, and ambient humidity 30%, electrospinning is performed to obtain an air-filtering nanofiber membrane with good filtering effect, high-efficiency antibacterial, and rich dendritic multi-level structure...

Embodiment 3

[0044] Example 3: Take 8ml of dimethylacetamide and 2ml of acetone, and prepare a composite organic solvent system with a ratio of 8:2; according to the mass concentration of 12%, weigh 1.3g of polyvinylidene fluoride (PVDF) and add it to the composite In an organic solvent, and at 80 °C water bath temperature, magnetically stirred for 3 hours to obtain a colorless and transparent polyvinylidene fluoride spinning solution; take 0.28g of amino-terminated hyperbranched compound quaternary ammonium salt (HBP-HTC) and add polyvinylidene fluoride ( PVDF) spinning solution, at 80°C water bath temperature, magnetically stirred for 5 hours to obtain a homogeneous spinning solution; h. The receiving distance is 20cm, the ambient temperature is 30°C, and the ambient humidity is 30%, and electrospinning is carried out to obtain an air filtration nanofiber membrane with good filtering effect, high-efficiency antibacterial, and rich dendritic multi-level structure. . The coverage rate of ...

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Abstract

The invention provides a preparation method of an air filtering nanofiber membrane with a dendritic multilevel structure. The preparation method of the air filtering nanofiber membrane with the dendritic multilevel structure comprises the following steps of adding amino-terminated hyperbranched quaternary ammonium salt into a dimethylacetamide/acetone compound organic solvent system of polyvinylidene fluoride, magnetically stirring at a certain temperature to prepare a homogeneous spinning solution, and then preparing through electrostatic spinning. According to the preparation method of the air filtering nanofiber membrane with the dendritic multilevel structure provided by the invention, on the basis of the principle that electrostatic spinning jet flow can be split, the amino-terminated hyperbranched polymer quaternary ammonium salt with a highly branched three-dimensional structure and excellent antibacterial property is added into a spinning solution, splitting of spinning jet flow is promoted through increase of the conductivity of the spinning solution and the steric hindrance effect, and the air filtering nanofiber membrane with abundant dendritic multilevel structures is prepared by adopting an electrostatic spinning technology and a one-step method. According to the preparation method of the air filtering nanofiber membrane with the dendritic multilevel structure provided by the invention, the preparation process is simple, the dendritic structure coverage rate is high, the filtering performance is good, the antibacterial performance is excellent, and the application prospect is good.

Description

technical field [0001] The invention relates to a preparation method of an air filtration nanofiber membrane with a dendritic multi-level structure, which belongs to the technical field of textiles. Background technique [0002] Pollutants in the atmospheric environment include particles, liquids, gases and their mixtures, among which fine particles have the characteristics of small particle size, easy to carry germs, long residence time in the atmosphere, and long transportation distance, which have brought great harm to human health. Traditional air filter materials can have a certain filtering effect on micron-sized particles, but have a poor filtering effect on nano-sized particles. The biomimetic dendritic nanofibers prepared by electrospinning are shaped like the branches in nature, including main fibers and branch fibers. Among them, the backbone fiber can provide mechanical support as a skeleton, and the branch fiber can provide a large specific surface area, a smal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00D01F1/09D01F1/10D01F6/12
CPCD04H1/728D01D5/003D01F1/09D01F1/10D01F1/103D01F6/12D10B2321/042D10B2401/16D10B2401/13D10B2505/04Y02C20/40
Inventor 赵为陶张珂伟
Owner CHANGZHOU TEXTILE GARMENT INST
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