Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation and regeneration method of antibacterial and anti-pollution PVDF ultrafiltration membrane

An ultrafiltration membrane and anti-pollution technology, applied in ultrafiltration, chemical instruments and methods, membranes, etc., can solve problems such as solubility reduction, achieve the effect of improving the effect, prolonging the service life, and reducing the frequency of membrane replacement

Active Publication Date: 2021-02-02
SHANXI UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, levofloxacin has good light and heat stability, it dissolves instantly in a slightly acidic environment, and its solubility decreases in neutral and alkaline conditions.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1, 0.25 g of levofloxacin, 1.2 g of polyvinylpyrrolidone (K30), and 10 g of polyvinylidene fluoride were successively dissolved in 38.55 g of N,N-dimethylacetamide, stirred in a water bath at 55°C for 4 h, and a uniform The casting solution was then allowed to stand at room temperature for 24 h for defoaming. Cast the casting solution on a clean glass plate at room temperature, and use an adjustable scraper to scrape a filter membrane with a thickness of 110 μm; dry it in the air for 30 s; Medium coagulation bath; soak in pure water for 24 h to prepare ultrafiltration membrane.

[0018] The performance of the ultrafiltration membrane was measured, and the results are as follows. The membrane surface contact angle is 73.58°; the pure water membrane flux is 142.27 L / (m 2 h), the flux recovery rate was 83.62%, the irreversible pollution index was 19.22, and the bacteriostatic rate was 66.30%.

Embodiment 2

[0019] Example 2, 0.5 g of levofloxacin, 1.2 g of polyvinylpyrrolidone (K30), and 10 g of polyvinylidene fluoride were successively dissolved in 38.3 g of N,N-dimethylacetamide, stirred in a water bath at 55°C for 4 h, and a uniform The casting solution was then allowed to stand at room temperature for 24 h for defoaming. Cast the casting solution on a clean glass plate at room temperature, and use an adjustable scraper to scrape a filter membrane with a thickness of 110 μm; dry it in the air for 30 s; medium coagulation bath; soak in pure water for 24 hours to obtain an ultrafiltration membrane.

[0020] The performance of the ultrafiltration membrane was measured, and the results are as follows. The membrane surface contact angle is 70.23°; the pure water flux is 159.70 L / (m 2 h), the flux recovery rate was 92.08%, the irreversible pollution index was 11.7; the bacteriostasis rate was 92.12%.

Embodiment 3

[0021] Example 3, 0.75 g of levofloxacin, 1.2 g of polyvinylpyrrolidone (K30), and 10 g of polyvinylidene fluoride were successively dissolved in 38.05 g of N,N-dimethylacetamide, stirred in a water bath at 55°C for 4 h, and a uniform The casting solution was then allowed to stand at room temperature for 24 h for defoaming. Cast the casting solution on a clean glass plate at room temperature, and use an adjustable scraper to scrape a filter membrane with a thickness of 110 μm; dry it in the air for 30 s; Medium coagulation bath; soak in pure water for 24 h to prepare ultrafiltration membrane.

[0022] The performance of the ultrafiltration membrane was measured, and the results are as follows. The membrane surface contact angle is 65.96°; the pure water flux is 164.31 L / (m 2 h), the flux recovery rate was 85.22%, the irreversible pollution index was 16.23, and the bacteriostatic rate was 92.51%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
contact angleaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of preparation and regeneration of antibacterial and anti-pollution ultrafiltration membranes, and relates to a preparation method of antibacterial and anti-pollution PVDF ultrafiltration membranes. Membrane material and organic solvent are mixed, wherein the mass of antibiotic monomer, porogen, main membrane material and organic solvent account for 0.3%‑3%, 0.5%‑3%, 12%‑20%, 74%‑of the total mass respectively 87.2%; step 2, pour the casting solution on a glass plate or non-woven fabric, make a film of 30-200 μm, leave it in the air, and use a levofloxacin / pure water dilute solution with a mass concentration of 0.1%-0.5% The coagulation bath is used as the non-solvent phase to prepare antibacterial and anti-pollution PVDF ultrafiltration membranes. The ultrafiltration membrane prepared by the invention is suitable for the water treatment process, and improves the membrane's effect of resisting the adsorption of organic matter and inhibiting the growth of microorganisms.

Description

technical field [0001] The invention belongs to the technical field of preparation and regeneration of antibacterial and anti-pollution ultrafiltration membranes, and specifically relates to the preparation of a polyvinylidene fluoride (PVDF) ultrafiltration membrane with synchronous functions of antibacterial and anti-pollution and a method containing electromagnetic technology, levofloxacin / Efficient regeneration method of acid-base composite technology. Background technique [0002] Membrane technology is widely used in many fields, promoting the progress and development of related industries. Membrane fouling is still a major obstacle limiting the promotion of membrane technology. The main causes of membrane fouling are the adsorption of organic matter by membrane materials, the attachment and growth of microorganisms, and the compound scaling of inorganic ions. The solution to the above problems lies in improving the hydrophilic and bacteriostatic properties of the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/34B01D69/02B01D67/00B01D65/02B01D61/14
CPCB01D61/145B01D65/02B01D67/0002B01D69/02B01D71/34B01D2321/16B01D2325/36B01D2325/48
Inventor 刘海龙廖祥军
Owner SHANXI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com