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Polymer film with antifouling and anti-bacterial functions and preparation method of polymer film

A polymer membrane, polymer technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as trouble, invasion and pollution, achieve good anti-fouling effect, super anti-organic pollution performance and The effect of antibacterial properties

Active Publication Date: 2015-02-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual use environment, the separation membrane materials used for water treatment are often not faced with a single pollution source, and in many cases are simultaneously attacked and polluted by organic pollutants and biological pollutants
How to endow separation membrane materials with comprehensive antifouling properties has been perplexing those skilled in the art, and there has been no report on polymer membranes with both antifouling and antibacterial properties.

Method used

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  • Polymer film with antifouling and anti-bacterial functions and preparation method of polymer film
  • Polymer film with antifouling and anti-bacterial functions and preparation method of polymer film
  • Polymer film with antifouling and anti-bacterial functions and preparation method of polymer film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Preparation of PVDF Flat Membrane with Antifouling and Antibacterial Function

[0079] 1. Preparation of silver-containing nanoparticles

[0080] 1 g of silica nanoparticles was ultrasonically dispersed into 50 ml of ethanol, 0.1 g of mercaptopropyltrimethoxysilane was added, and the reaction was refluxed at 80 °C for 5 h. Subsequently, 10 ml of 0.1 mM silver nitrate solution was added and reacted for 2 h. Then add 5 ml of 0.1 M sodium borohydride solution to the solution system and fully react for 1 h. The modified nanoparticles were collected by centrifugation for later use.

[0081] 2. Preparation of polymer films

[0082] Disperse 1 g of modified nanoparticles into 74 g of DMAC, add 25 g of PVDF and 5 g of PEG, and use a high-speed mechanical stirrer to stir and dissolve at a rate of 12000 r / min for 30 min to obtain a casting solution; After the membrane solution was vacuum degassed for 6 hours, the casting solution was directly scraped onto the support net to...

Embodiment 2

[0093] Preparation of PVDF hollow fiber membrane with antifouling and antibacterial functions

[0094] 1. Preparation of silver-containing nanoparticles

[0095] Ultrasonic dispersion of 1 g of titanium dioxide nanoparticles into 50 ml of ethanol solution was added with 0.5 g of mercaptopropyltrimethoxysilane, and the reaction was refluxed at 80 °C for 10 h. Subsequently, 50 ml of 0.1 mM silver nitrate solution was added and reacted for 5 h. Then add 20 ml of 0.1 M sodium borohydride solution to the solution system and fully react for 4 h. The modified nanoparticles were collected by centrifugation for later use.

[0096] 2. Preparation of polymer films

[0097] Disperse 0.1 g of modified nanoparticles into 80 g of NMP, add 15 g of PVDF and 5 g of PEG, and use a high-speed mechanical stirrer to stir and dissolve for 20 min at a rate of 10,000 r / min to obtain a casting solution; After 8 hours of vacuum degassing treatment, the casting solution was put into the spinning ke...

Embodiment 3

[0103] Preparation of PAN Flat Film with Antifouling and Antibacterial Function

[0104] 1. Preparation of silver-containing nanoparticles

[0105] 1 g of hydroxylated carbon nanotubes was ultrasonically dispersed into 50 ml of ethanol, 0.3 g of mercaptopropyltrimethoxysilane was added, and the reaction was refluxed at 80 °C for 10 h. Then add 30 ml of 0.1 mM silver nitrate solution and react for 4 h; then add 15 ml of 0.1 M sodium borohydride solution to the solution system and fully react for 3 h. By centrifugation, the modified hydroxylated carbon nanotubes are collected for use.

[0106] 2. Preparation of polymer films

[0107] Disperse 2 g of modified hydroxylated carbon nanotubes into 60 g of DMF, add 18 g of PAN and 10 g of PVP, and use a high-speed mechanical stirrer to stir and dissolve at a rate of 12000 r / min for 30 min to obtain a cast film liquid; after 7 hours of vacuum defoaming treatment on the casting solution, the casting solution was directly scraped to...

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Abstract

The invention discloses a polymer film with antifouling and anti-bacterial functions and a preparation method of the polymer film. Silver-containing nano particles are uniformly dispersed in the polymer film, and the surfaces of the silver-containing nano particles are coated with silver ions through chemical bonds. The adsorption amount of the polymer film to bovine serum albumin in unit area is 10 micrograms per square centimeter below, and the secondary water flux recovery rate of the separation film reaches 95% above. The kill rate of the polymer film for escherichia coli, staphylococcus aureus, pseudomonas aeruginosa, candida albicans and yeast is 100%.

Description

technical field [0001] The invention relates to a polymer film with antifouling and antibacterial functions and the application of its preparation method, more specifically, to a polymer film uniformly dispersed with silver-containing nanoparticles, its preparation method and its application in water treatment application. technical background [0002] In water treatment, separation membranes for nanofiltration or ultrafiltration are often plagued by interface fouling problems. Pollution mainly includes inorganic pollution, organic pollution and biological pollution, especially organic and biological pollution. Organic pollutants include various proteins. With the help of hydrophobic interaction, hydrophobic proteins are easily attached to the surface and pores of polymer membrane materials, causing irreversible pollution. Biological pollutants include various microorganisms, such as bacteria, fungi, viruses, algae, etc. In addition to adhering to the surface of materials,...

Claims

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Application Information

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IPC IPC(8): B01D69/02B01D69/06B01D69/08B01D71/34B01D71/48B01D71/68B01D71/42B01D67/00
Inventor 何春菊赵新振刘大朋王海晔秦爱文李翔
Owner DONGHUA UNIV
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