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

Preparation method of anti-biological-pollution PVDF (polyvinylidene fluoride) film

A technology of polyvinylidene fluoride film and polyvinylidene fluoride, which is applied in the field of polymer film modification, can solve problems such as negligence, increase surface energy, improve pure water flux and antibacterial properties, and controllable modification conditions Effect

Inactive Publication Date: 2014-09-03
TIANJIN POLYTECHNIC UNIV
View PDF4 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results showed that the bacteriostasis, pure water flux and anti-fouling performance of the modified membrane were all improved, but the impact of the amount of silver loaded on the improvement of the membrane performance was neglected.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of anti-biological-pollution PVDF (polyvinylidene fluoride) film
  • Preparation method of anti-biological-pollution PVDF (polyvinylidene fluoride) film
  • Preparation method of anti-biological-pollution PVDF (polyvinylidene fluoride) film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Dissolve 1.0 g of polyvinylpyrrolidone (PVP) and 9.0 g of PVDF in 40 g of N,N-dimethylacetamide (DMAc), and stir continuously in a water bath at 65°C for 24 hours to obtain a PVDF casting solution, which is sealed and statically Degassing for 2 days. Use a self-made scraper to control the amount of liquid on a clean glass plate at room temperature to scrape the film, stay in the air for about 30 seconds, quickly immerse it in a water coagulation bath, and change the water repeatedly to remove the solvent and porogen to make the PVDF film (M). Its characteristics: the PVDF casting membrane solution is prepared with the best ratio of each component, and the separation membrane obtained from this has better performance in various aspects.

Embodiment 2

[0035] Ultrasonic dispersion of 0.5 g of nano-silver phosphate in 39.5 g of N,N-dimethylacetamide (DMAC) for 2 hours, followed by adding 9.0 g of PVDF and 1.0 g of polyvinylpyrrolidone (PVP), and continuously stirring in a water bath at 65°C for 24 Hour obtains the PVDF casting solution containing silver phosphate, and it is sealed and left to stand for 2 days for degassing. Use a self-made scraper to control the amount of liquid on a clean glass plate at room temperature to scrape the film, stay in the air for about 30 seconds, quickly dip into the water coagulation bath, change the water repeatedly to remove the solvent and porogen, and make the modified PVDF membrane (M1).

Embodiment 3

[0037]Ultrasonically disperse 0.5 g of negative ion powder in 39.5 g of N,N-dimethylacetamide (DMAC) for 2 hours, add 9.0 g of PVDF and 1.0 g of polyvinylpyrrolidone (PVP) in sequence, and continuously stir in a water bath at 65°C for 24 hours Obtain silver phosphate-containing PVDF casting solution, which is sealed and allowed to stand for 2 days for degassing. Use a self-made scraper to control the amount of liquid on a clean glass plate at room temperature to scrape the film, stay in the air for about 30 seconds, quickly immerse in a water coagulation bath, change the water repeatedly to remove the solvent and porogen, and make the modified PVDF membrane (M2).

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of a PVDF (polyvinylidene fluoride) film modified by silver phosphate modified nano negative ion powder. The preparation method comprises the steps of firstly, obtaining nano silver phosphate by adopting an ion exchange method, and modifying negative ion powder by nano silver phosphate to obtain negative ion powder with different silver carrying capacity; secondly, adding a proper amount of the silver-carrying negative ion powder into a PVDF casting film solution, and preparing the modified PVDF film containing the silver-carrying negative ion powder by adopting a phase inversion method. By virtue of peculiar nanometer size effect and surface energy of the silver-carrying negative ion powder, the PVDF film is endowed with effective anti-biological-pollution capability, the hydrophilicity of the PVDF film is improved, and the flux recovery rate of the PVDF film is increased; in addition, the preparation method of the modified PVDF film is simple and easy to adjust and control.

Description

technical field [0001] The invention belongs to the field of polymer membrane modification, and the content relates to a method for preparing a polyvinylidene fluoride membrane with both hydrophilic and anti-biological pollution functions. Background technique [0002] Membrane water treatment is known as one of the preferred technologies in the field of water pollution control engineering. It has been widely used in drinking water purification, sewage treatment and reuse, etc., mainly because it can shorten the process flow, improve the quality of effluent water and intensive high degree of transformation. However, in membrane water treatment, membrane fouling is aimed at filtration. Particles, colloidal particles, organic matter or proteins in wastewater will have physical and chemical interactions with membrane materials, or the above substances will be enriched on the membrane surface due to concentration polarization. , and cause adsorption and deposition in the pores,...

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
IPC IPC(8): B01D71/34B01D69/02B01D67/00
Inventor 文晨周婕郭威丽
Owner TIANJIN POLYTECHNIC 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