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Antibacterial and pollution-resistant PVDF ultrafiltration membrane for water filtration

A pollution-resistant, water filtration technology, applied in ultrafiltration, membrane, membrane technology, etc., can solve the problem of ineffective killing of microorganisms, and achieve the effect of improving hydrophilicity, improving antibacterial performance, and reducing adhesion

Active Publication Date: 2021-08-27
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 pollution-resistant PVDF ultrafiltration membrane for water filtration
  • Antibacterial and pollution-resistant PVDF ultrafiltration membrane for water filtration
  • Antibacterial and pollution-resistant PVDF ultrafiltration membrane for water filtration

Examples

Experimental program
Comparison scheme
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 pollution-resistant PVDF ultrafiltration membrane for water filtration, which mainly includes the following components according to parts by mass: polyvinylidene fluoride: 100 parts; polyethylene glycol: 15-35 parts; silver-loaded chitosan : 3‑15 servings. The present invention mixes polyvinylidene fluoride and polyethylene glycol after dissolving in N-methylpyrrolidone solvent through a solution blending method; prepares silver-loaded chitosan solution with chitosan, and dips 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. The polyvinylidene fluoride microporous membrane prepared by the invention not only has good hydrophilicity, but also can kill microorganisms on the surface, can reduce the amount of protein adhesion in sewage, and can inactivate proteins at the same time, effectively prolonging the life of polyvinylidene fluoride. membrane life.

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