Preparation method of super-hydrophobic or super-hydrophilic nanofiber membrane with antibacterial performance

A nanofiber membrane and nanofiber technology, applied in fiber processing, non-woven fabrics, filament/thread forming, etc., can solve problems such as large environmental pollution, complex processes, and fluorine-containing materials are not easy to degrade, and achieve cheap raw materials and synthetic Simple, improved selective wettability

Active Publication Date: 2016-05-11
上海展恒环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for controlled changes on how layers inside a special material can absorb liquids like blood while maintain their original shape without losing them permanently due to modifications made during manufacturing process such as adding extra substances into it through impregnating methods. By changing certain parameters within this material, different types of liquid absorption capabilities may also occur depending upon factors like pH level, ion concentrations, temperature, solvent type used, and other conditions involved. These techniques allow researchers to study various ways to create effective filters from these films.

Problems solved by technology

This patents describes methods that create special types of fibers called microfins (microscopes) made up from tiny particles attached onto their surfaces through strong interactions like Van der Waals forces). These fibers exhibiting specific characteristics make them ideal candidates for various applications including water purification systems, drug delivery devices, sensors, filters, coatings, wound dressings, tissue engineering scaffolds, and medical implants. However, these techniques involve complex processes involving expensive equipment and may lead to negative effects on human health if they were applied incorrectly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for preparing a superhydrophilic nanofiber membrane with antibacterial properties, comprising the following steps:

[0017] A. Step (1) Preparation of polyacrylonitrile solution: Dissolve 10g of polyacrylonitrile powder in 90g of N-N-dimethylformamide solution at room temperature and stir at 100rpm for 12h , until evenly stirred to obtain a polyacrylonitrile solution with a mass fraction of 10wt%;

[0018] B. Step (2) Electrospinning: At room temperature and humidity of 40-50%, the polyacrylonitrile solution prepared in step (1) with a mass fraction of 10wt% is subjected to electrostatic spinning at a rate of 2.5ml / h Spinning, the voltage of electrospinning is 20kV, the distance of electrospinning is 15cm, the receiving carrier of electrospinning is PET non-woven fabric, the drum speed of electrospinning is 50rpm, obtains polyacrylonitrile porous nanofiber film;

[0019] C. Step (3) Preparation of Chitosan Quaternary Ammonium Salt Solution: Dissolve 5g of Chit...

Embodiment 2

[0025] A method for preparing a superhydrophilic nanofiber membrane with antibacterial properties, comprising the following steps:

[0026] A. Step (1) Preparation of polyurethane solution: at room temperature, dissolve 2 g of polyurethane in 45 g of N-N-dimethylformamide and 45 g of tetrahydrofuran solution, and stir at a stirring speed of 100 rpm for 12 hours until Stir evenly, obtain the polyurethane solution that massfraction is 5wt%;

[0027] B. Step (2) Electrospinning: Under the condition of room temperature and humidity of 40-50%, the polyurethane solution with a mass fraction of 5wt% prepared in step (1) was electrospun at a speed of 5ml / h, The voltage of electrospinning is 25kV, the distance of electrospinning is 20cm, the receiving carrier of electrospinning is PET non-woven fabric, the drum speed of electrospinning is 50rpm, and polyurethane porous nanofiber film is obtained;

[0028] C. Step (3) Preparation of chitosan quaternary ammonium salt solution: Dissolve ...

Embodiment 3

[0034] A method for preparing a superhydrophilic nanofiber membrane with antibacterial properties, comprising the following steps:

[0035] A. Step (1) Preparation of polyimide solution: at room temperature, dissolve 20g of polyimide in 40g of N-N-dimethylformamide and 40g of N-methylpyrrolidone solution, and stir, stirring speed Be 100rpm, stirring time is 12h, until stirring evenly, obtaining the polyimide solution that mass fraction is 20wt%;

[0036] B. Step (2) Electrospinning: At room temperature and humidity of 40-50%, the polyimide solution with a mass fraction of 20wt% prepared in step (1) is subjected to electrostatic spinning at a rate of 1ml / h Spinning, the voltage of electrospinning is 25kV, the distance of electrospinning is 10cm, the receiving carrier of electrospinning is PET non-woven fabric, the drum speed of electrospinning is 50rpm, obtains polyimide porous nanofiber film;

[0037] C. Step (3) Preparation of chitosan quaternary ammonium salt solution: Diss...

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Abstract

The invention discloses a preparation method of a super-hydrophobic or super-hydrophilic nanofiber membrane with antibacterial performance. The preparation method of the super-hydrophobic or super-hydrophilic nanofiber membrane with the antibacterial performance is characterized by comprising preparation steps as follows: step (1), a polymer solution is prepared; step (2), electrostatic spinning is performed; step (3), a quaternary ammonium salt solution is prepared; step (4), a suspension mixed liquid containing a quaternary ammonium salt and nano-particles is prepared; step (5), a porous nano-fiber membrane is modified with the suspension mixed liquid containing the quaternary ammonium salt and the nano-particles; step (6), the porous nano-fiber membrane modified with the suspension mixed liquid containing the quaternary ammonium salt and the nano-particles is placed in a vacuum oven at the temperature of 60 DEG C to be dried for 1-3 h, and a finished product of the super-hydrophobic or super-hydrophilic nano-fiber membrane with the antibacterial performance is prepared.

Description

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Claims

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Application Information

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Owner 上海展恒环保科技有限公司
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