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Visible-light-response antibacterial and antifouling polyvinylidene fluoride film and preparation method thereof

A technology of polyvinylidene fluoride membrane and polyvinylidene fluoride, which is applied in the field of preparation of modified ultrafiltration membranes, can solve the problems of not being able to effectively improve the antibacterial properties of PVDF membranes, and achieve reduced cleaning and maintenance costs, extended service life, and good antibacterial properties and anti-pollution properties

Inactive Publication Date: 2015-03-04
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many blended modified materials such as SiO 2 、TiO 2 、Al 2 o 3 etc., which are limited to the hydrophilic modification of the membrane, and cannot effectively improve the antibacterial performance of the PVDF membrane

Method used

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  • Visible-light-response antibacterial and antifouling polyvinylidene fluoride film and preparation method thereof
  • Visible-light-response antibacterial and antifouling polyvinylidene fluoride film and preparation method thereof
  • Visible-light-response antibacterial and antifouling polyvinylidene fluoride film and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] A visible light response antibacterial and antifouling polyvinylidene fluoride film, the preparation method of which comprises the following steps:

[0046] (1) Preparation of Ag 3 PO 4 / TiO 2 Composite: 1.56g of commercial TiO 2 (P25) was dispersed in 50ml of deionized water, after ultrasonication for 5min, 3g of AgNO was added 3 , mechanically stirred for 15min to obtain TiO 2 with AgNO 3 The mixture; the 2.3g Na 3 PO 4 12H 2 O was dissolved in 50ml deionized water to obtain a sodium phosphate solution, and then the sodium phosphate solution was added dropwise to the TiO 2 with AgNO 3 In the mixed solution, after the dropwise addition, continue to stir for 5h, filter and wash with suction, and finally dry at 60°C to obtain the Ag 3 PO 4 / TiO 2 Compound, stored in a dark place for later use;

[0047] (2) Preparation of polyvinylidene fluoride casting solution: get 0.067g of Ag obtained in step (1) 3 PO 4 / TiO 2 The compound was ultrasonically dispersed ...

Embodiment 2

[0052] A visible light-responsive antibacterial and antifouling polyvinylidene fluoride film, the preparation method of which comprises the following steps: a visible light responsive antibacterial and antifouling polyvinylidene fluoride film, the preparation method of which comprises the following steps:

[0053] (1) Preparation of Ag 3 PO 4 / TiO 2 Composite: 1g commercial TiO 2 (P25) was dispersed in 50ml deionized water, after ultrasonication for 5min, 4g AgNO was added 3 , mechanically stirred for 15min to obtain TiO 2 with AgNO 3 The mixture; the 2.3g Na 3 PO 4 12H 2 O was dissolved in 50ml deionized water to obtain a sodium phosphate solution, and then the sodium phosphate solution was added dropwise to the TiO 2 with AgNO 3 In the mixed solution, after the dropwise addition, continue to stir for 5h, filter and wash with suction, and finally dry at 60°C to obtain the Ag 3 PO 4 / TiO 2 Compound, stored in a dark place for later use;

[0054] (2) Preparation of...

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Abstract

The invention belongs to the technical field of modified ultrafiltration films, and discloses a visible-light-response antibacterial and antifouling polyvinylidene fluoride film and a preparation method thereof. The preparation method comprises the following steps: firstly depositing Ag3PO4 nanometer particles on the surface of TiO2 by using a in-situ deposition method to obtain an Ag3PO4 / TiO2 compound; then dissolving polyvinylidene fluoride powder, a pore-foaming agent and the Ag3PO4 / TiO2 compound in an organic solvent, mixing to enable the polyvinylidene fluoride powder, the pore-foaming agent and the Ag3PO4 / TiO2 compound to be uniformly dispersed, and then performing decompressing defoaming to obtain a casting film solution; and finally, scraping the film by using a scraper, tape-casting the casting film solution on a clean glass plate, and immersing in a coagulating bath after standing in air to obtain the visible-light-response antibacterial and antifouling polyvinylidene fluoride film. The visible-light-response antibacterial and antifouling polyvinylidene fluoride film has double performances of hydrophilcity and bacterium and fouling resistance, and can be used for lightening the situation that the surface of the polyvinylidene fluoride is polluted when water is treated, and effectively inhibiting the growth and the reproduction of bacteria and microorganisms on the surface of the film.

Description

technical field [0001] The invention belongs to the technical field of preparation of modified ultrafiltration membranes, and in particular relates to a visible light-responsive antibacterial and antifouling polyvinylidene fluoride membrane and a preparation method thereof. Background technique [0002] Membrane separation technology is a high-tech solution to contemporary energy, resource and environmental pollution problems and the technical basis for sustainable development. The study of ultrafiltration membrane has important theoretical significance and practical application value. At present, research on ultrafiltration membranes mainly focuses on improving hydrophilicity and anti-fouling properties. [0003] Among the currently commonly used membrane materials, polyvinylidene fluoride (PVDF) has a high thermal decomposition temperature, excellent mechanical properties, good impact resistance, weather resistance, wear resistance and chemical stability, and is not easil...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D69/02B01D67/00B01J31/38B01J35/02
Inventor 洪孝挺周育妹曾志李敏
Owner SOUTH CHINA NORMAL UNIVERSITY
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