Method for preparing ultrafiltration membrane with permanent hydrophilic and antimicrobial properties

An antibacterial and ultrafiltration membrane technology, which is applied in the field of separation membrane preparation, can solve the problems of loss of antibacterial property and attenuation of antibacterial effect, and achieve the effect of improving hydrophilicity and antibacterial property

Active Publication Date: 2012-10-03
OCEAN UNIV OF CHINA
View PDF4 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the hydrophilic modification of ultrafiltration membranes has achieved great success, but there are still some problems in antibacterial modi...

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Dissolve 2 parts by weight of HMBA and 10 parts by weight of acrylic acid in 38 parts by weight of absolute ethanol to make a modified solution; the base membrane of the polyethersulfone ultrafiltration membrane is repeatedly washed with deionized water for 3 times under ultrasonic waves, and the modified solution is coated with Lay it on the front of the pretreated ultrafiltration membrane, and place it in a photoreactor. After 10 minutes of deoxygenation with nitrogen, turn on the ultraviolet lamp (power 300W, wavelength 300nm), and carry out surface graft polymerization under light at 25°C1 After the reaction, the surface of the membrane was repeatedly washed with deionized water and absolute ethanol 3 times to remove unreacted monomers to obtain a modified ultrafiltration membrane.

[0016] The prepared modified polyethersulfone ultrafiltration membrane has a pure water permeability coefficient of 136L / (m 2 ·hr·0.1MPa), the rejection rate of bovine serum albumin (BS...

Embodiment 2

[0018] Dissolve 2 parts by weight of HMBA and 10 parts by weight of acrylic acid in 38 parts by weight of absolute ethanol to make a modified solution; the base membrane of the polyethersulfone ultrafiltration membrane is repeatedly washed with deionized water for 3 times under ultrasonic waves, and the modified solution is coated with Lay it on the front of the pretreated ultrafiltration membrane, and place it in a photoreactor. After 10 minutes of deoxygenation with nitrogen, turn on the ultraviolet lamp (power 300W, wavelength 300nm), and carry out surface graft polymerization reaction under light at 25°C for 10 minutes. After the reaction, the surface of the membrane was repeatedly washed with deionized water and absolute ethanol 3 times to remove unreacted monomers to obtain a modified ultrafiltration membrane.

[0019] The prepared modified polyethersulfone ultrafiltration membrane has a pure water permeability coefficient of 124L / (m 2 ·hr·0.1MPa), the rejection rate of ...

Embodiment 3

[0021] Dissolve 5 parts by weight of HMBA and 10 parts by weight of acrylic acid in 35 parts by weight of absolute ethanol to prepare a modified solution; the base membrane of the polyethersulfone ultrafiltration membrane is repeatedly washed with deionized water for 3 times under ultrasonic waves, and the modified solution is coated with Lay it on the front of the pretreated ultrafiltration membrane, and place it in a photoreactor. After 10 minutes of deoxygenation with nitrogen, turn on the ultraviolet lamp (power 300W, wavelength 300nm), and carry out surface graft polymerization under light at 25°C1 After the reaction, the surface of the membrane was repeatedly washed with deionized water and absolute ethanol 3 times to remove unreacted monomers to obtain a modified ultrafiltration membrane.

[0022] The prepared polyethersulfone ultrafiltration membrane has a pure water permeability coefficient of 128L / (m 2 ·hr·0.1MPa), the rejection rate of bovine serum albumin (BSA, 670...

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

PropertyMeasurementUnit
Poweraaaaaaaaaa
Wavelengthaaaaaaaaaa
Pure water permeability coefficientaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for preparing an ultrafiltration membrane with permanent hydrophilic and antimicrobial properties, which comprises the following steps: preparing a modifying solution from a photosensitizer as well as acrylamide, acrylic acid and other hydrophilic monomers with derivative structures of the capsaicin, spreading the modifying solution on the surface of a pretreated ultrafiltration membrane, introducing nitrogen to remove oxygen, turning on an ultraviolet lamp to carry out reaction for a certain time, and fully cleaning the surface of the pretreated ultrafiltration membrane by deionized water and absolute ethyl alcohol after the reaction finishes so as to remove the unreacted monomers and obtain the modified ultrafiltration membrane. The pure water flux of the flat membrane prepared by adopting the method is more than or equal to 120L/m<2>.hr.0.1Mpa, and the flat membrane can retain 90% of bovine serum albumin (67,000MW) or more and resist more than 92% of colon bacillus and more than 85% of staphylococcus aureus. The hydrophilic and antimicrobial properties of the ultrafiltration membrane are improved greatly due to surface grafting modification, and the ultrafiltration membrane can be used for the high molecular material with carbon-hydrogen bonds or carbon-carbon double bonds on a polymer chain to carry out light grafting modification.

Description

Technical field: [0001] The invention relates to a preparation method of an ultrafiltration membrane with permanent hydrophilicity and permanent antibacterial property, belonging to the technical field of separation membrane preparation. Background technique: [0002] The modification methods of polymer separation membranes include material blending, copolymerization, grafting, physical adsorption, etc., so as to endow ultrafiltration membranes with certain functions, such as hydrophilicity and antibacterial properties. Grafting is a commonly used modification method of polymer materials. The grafting method can be divided into thermal grafting, photografting, radiation grafting, etc. according to the different ways of free radical initiation. The grafting reaction can be solid surface grafting. polymerization, emulsion graft polymerization, and solution graft polymerization. Among them, graft polymerization induced by ultraviolet light has attracted much attention due to i...

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): B01D67/00B01D69/02B01D69/12B01D71/68
Inventor 高学理黄星王剑刘淑民高从堦
Owner OCEAN UNIV OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap