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Antibacterial and fouling-resistant PVDF (Polyvinylidene Fluoride) ultrafiltration membrane for water filtration

A technology of pollution resistance and water filtration, applied in the direction of ultrafiltration, membrane, membrane technology, etc., can solve the problems of ineffective killing of microorganisms, achieve the effect of prolonging the service life and reducing the amount of adhesion

Active Publication Date: 2018-04-06
河南豫膜环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art physically or chemically modifies the surface hydrophilicity of PVDF membranes. However, simply modifying the hydrophilicity of PVDF membranes cannot effectively kill the attached and bred microorganisms.

Method used

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  • Antibacterial and fouling-resistant PVDF (Polyvinylidene Fluoride) ultrafiltration membrane for water filtration
  • Antibacterial and fouling-resistant PVDF (Polyvinylidene Fluoride) ultrafiltration membrane for water filtration
  • Antibacterial and fouling-resistant PVDF (Polyvinylidene Fluoride) ultrafiltration membrane for water filtration

Examples

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Effect test

Embodiment 1

[0019] An antibacterial and pollution-resistant PVDF ultrafiltration membrane for water filtration mainly includes the following components in terms of parts by mass: the PVDF microporous membrane mainly includes: 100 parts of polyvinylidene fluoride, 15 parts of polyvinyl alcohol, 10 parts by mass Part silver-loaded chitosan; silver-loaded amount in the described silver-loaded chitosan is 250mg / g, and the degree of deacetylation of the described chitosan is 86%; joint agent.

[0020] The present invention mixes polyvinylidene fluoride and polyethylene glycol evenly after dissolving in N-methylpyrrolidone solvent through a solution blending method; prepares a silver-loaded chitosan solution with chitosan, and dips the polyvinylidene fluoride film in The polyvinylidene fluoride microporous membrane with hydrophilic antibacterial and pollution resistance can be prepared after drying in the silver-loaded chitosan solution.

[0021] The surface contact angle of the polyvinylidene...

Embodiment 2

[0028] An antibacterial and pollution-resistant PVDF ultrafiltration membrane for water filtration mainly includes the following components in terms of parts by mass: the PVDF microporous membrane mainly includes: 100 parts of polyvinylidene fluoride, 20 parts of polyvinyl alcohol, 12 parts by mass Part silver-loaded chitosan; Silver loading in the described silver-loaded chitosan is 275mg / g, and the degree of deacetylation of the described chitosan is 86%; joint agent.

[0029] The present invention mixes polyvinylidene fluoride and polyethylene glycol evenly after dissolving in N-methylpyrrolidone solvent through a solution blending method; prepares a silver-loaded chitosan solution with chitosan, and dips the polyvinylidene fluoride film in The polyvinylidene fluoride microporous membrane with hydrophilic antibacterial and pollution resistance can be prepared after drying in the silver-loaded chitosan solution.

[0030] The surface contact angle of the polyvinylidene fluor...

Embodiment 3

[0037] An antibacterial and pollution-resistant PVDF ultrafiltration membrane for water filtration mainly includes the following components in terms of parts by mass: the PVDF microporous membrane mainly includes: 100 parts of polyvinylidene fluoride, 13 parts of polyvinyl alcohol, 10 parts by mass Part silver-loaded chitosan; silver-loaded amount in the described silver-loaded chitosan is 235mg / g, and the degree of deacetylation of the described chitosan is 86%; joint agent.

[0038] The present invention mixes polyvinylidene fluoride and polyethylene glycol evenly after dissolving in N-methylpyrrolidone solvent through a solution blending method; prepares a silver-loaded chitosan solution with chitosan, and dips the polyvinylidene fluoride film in The polyvinylidene fluoride microporous membrane with hydrophilic antibacterial and pollution resistance can be prepared after drying in the silver-loaded chitosan solution.

[0039] The surface contact angle of the polyvinylidene...

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Abstract

The invention discloses an antibacterial and fouling-resistant PVDF (Polyvinylidene Fluoride) ultrafiltration membrane for water filtration. The ultrafiltration membrane mainly comprises the followingcomponents in parts by weight: 100 parts of polyvinylidene fluoride, 15-35 parts of polyethylene glycol and 3-15 parts of silver-loaded chitosan. The preparation method comprises the following steps:dissolving polyvinylidene fluoride and polyethylene glycol into an N-methyl pyrrolidone solvent, and uniformly mixing by a solution blending method; preparing a silver-loaded chitosan solution by chitosan, dipping a polyvinylidene fluoride membrane into the silver-loaded chitosan solution, and drying, thereby obtaining a hydrophilic antibacterial and fouling-resistant PVDF micro-porous membrane.The PVDF micro-porous membrane prepared by the method disclosed by the invention has excellent hydrophilic property and can achieve the effects of killing microbial flora on the surface and reducing the adhesion amount of proteins in sewage. Meanwhile, the proteins can be inactivated, and the service life of the PVDF membrane is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of polyvinylidene fluoride filter membranes for water filtration, and in particular relates to an antibacterial and pollution-resistant PVDF ultrafiltration membrane for water filtration. Background technique [0002] Polyvinylidene fluoride has the characteristics of excellent chemical stability, radiation resistance, heat resistance and easy film formation. However, the surface free energy of polyvinylidene fluoride is low, and the surface hydrophilicity of polyvinylidene fluoride film is poor. When polyvinylidene fluoride is used as a water treatment membrane, it is easy to be polluted, which leads to a decrease in the flux and separation effect of the PVDF water treatment membrane, which increases the difficulty of cleaning and reduces the service life of the membrane. [0003] The surface of the PVDF water treatment membrane is hydrophobic, and the colloids, proteins and other organic substances contain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/38B01D71/34B01D71/08B01D69/02B01D67/00B01D61/14
CPCB01D61/145B01D67/0002B01D69/02B01D71/08B01D71/34B01D71/38B01D2323/02B01D2325/36B01D2325/48
Inventor 张欢
Owner 河南豫膜环保科技有限公司
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