Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of copper ion doped alginate hydrogel antibacterial filter membrane

An alginate and hydrogel technology, applied in the fields of filtration membranes, functional materials and membrane separation, hydrogels, and antibacterials, can solve the problem of low strength of calcium alginate hydrogel filtration membranes, traditional membranes that are not resistant to pollution, and easy to use. It can be degraded by bacteria and other problems, and achieve the effects of good antibacterial and anti-pollution properties, simple preparation method and low swelling rate.

Active Publication Date: 2020-02-04
TIANJIN POLYTECHNIC UNIV
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the technical problems to be solved by the present invention are traditional membranes not resistant to pollution, poor hydrophilicity, low strength of calcium alginate hydrogel filtration membrane, easy to be degraded by bacteria, etc.

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

[0020] a) dissolving sodium alginate and carboxymethyl cellulose in water together, and standing for degassing to obtain a casting solution;

[0021] b) Pour the film casting solution obtained in step a) onto a dry and clean glass plate, scrape it flat with a glass rod with a diameter of 140 μm copper wires wound at both ends, and then immediately soak the glass plate and the scraped film into a mass percentage concentration Crosslinking in 0.8% glutaraldehyde aqueous solution for 400min, glutaraldehyde crosslinks the hydroxyl groups on the carboxymethyl cellulose and the hydroxyl groups on the alginate at the same time, which plays a role in strengthening the alginate hydrogel, and at the same time reduces the The swelling properties of the alginate hydrogel; the membrane was then fully washed with deionized water to remove residual glutaraldehyde and stored in deionized water;

[0022] c) preparing an aqueous calcium chloride solution with a concentration of 8% by mass as th...

Embodiment 2

[0025] a) Sodium alginate and carboxymethyl chitosan are dissolved in water together, left standing for defoaming to obtain the casting solution;

[0026] b) Pour the film casting solution obtained in step a) onto a dry and clean glass plate, scrape it flat with a glass rod with a diameter of 80 μm copper wires wound at both ends, and then immediately soak the glass plate and the scraped film into a mass percentage concentration Cross-linking in 0.9% glutaraldehyde aqueous solution for 450min, glutaraldehyde simultaneously cross-links the hydroxyl groups on the carboxymethyl chitosan and the hydroxyl groups on the alginate to strengthen the alginate hydrogel and reduce the The swelling properties of the alginate hydrogel; then the membrane is fully washed with deionized water to remove residual glutaraldehyde, and stored in deionized water;

[0027] c) preparing an aqueous calcium nitrate solution with a mass percentage concentration of 9% as the first coagulation bath; prepar...

Embodiment 3

[0030] a) dissolving sodium alginate and hydroxypropyl methylcellulose in water together, and standing for degassing to obtain a casting solution;

[0031] b) Pour the film casting solution obtained in step a) onto a dry and clean glass plate, scrape it flat with a glass rod with a diameter of 130 μm copper wires wound at both ends, and then immediately soak the glass plate and the scraped film into a mass percentage concentration Cross-linking in 12% glutaraldehyde aqueous solution for 420min, glutaraldehyde crosslinks the hydroxyl groups on the hydroxypropyl methylcellulose and the hydroxyl groups on the alginate at the same time, which plays a role in strengthening the alginate hydrogel, and at the same time reduces the The swelling properties of small alginate hydrogels; the membranes were then washed thoroughly with deionized water to remove residual glutaraldehyde and stored in deionized water;

[0032] c) preparing an aqueous solution of calcium dihydrogen phosphate wit...

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of a copper ion doped alginate hydrogel antibacterial filter membrane. Sodium alginate and a polymer reinforcing agent are dissolved in water together, standing and defoaming are performed to obtain a membrane casting solution, the membrane casting solution is scraped into a membrane and soaked in a glutaraldehyde aqueous solution, glutaraldehyde is crosslinked with hydroxyl on the polymer reinforcing agent and hydroxyl on alginate at the same time, and the effect of reinforcing alginate hydrogel is achieved. The obtained membrane is fully washed with water to remove residual glutaraldehyde, and the glutaraldehyde cross-linked alginate hydrogel membrane is soaked into an excessive soluble calcium salt aqueous solution for cross-linking to obtainthe calcium alginate hydrogel filter membrane containing the polymer reinforcing agent. For enabling the membrane to have an antibacterial function, the membrane is soaked in a soluble copper salt aqueous solution for crosslinking to obtain the copper ion doped alginate hydrogel antibacterial filter membrane, and the membrane is high in mechanical strength and low in swelling rate and can be applied to the fields of dye desalination, emulsified oil filtration, wastewater treatment and the like.

Description

technical field [0001] The invention relates to a preparation method of a copper ion-doped alginate hydrogel antibacterial filter membrane, which belongs to the field of functional materials and membrane separation. [0002] The invention relates to the technical fields of antibacterial, filter membrane, hydrogel and the like. Specifically relates to a preparation method of copper ion-doped alginate hydrogel antibacterial filter membrane. Background technique [0003] Membrane separation technology is an environmentally friendly new technology. Compared with traditional wastewater treatment methods, it has no secondary pollution, low energy consumption, and simple operation. It is one of the most promising water treatment technologies at present [J. Hazard . Mater, 2016, 308: 75-83]. In the preparation of traditional polymer filtration membranes, the polymer is first dissolved in an organic solvent, and then undergoes a phase transition into a membrane in an aqueous coagul...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/74B01D69/00B01D69/02B01D67/00
CPCB01D71/74B01D71/022B01D69/00B01D69/02B01D67/0079B01D2325/48B01D2323/30B01D2325/24
Inventor 赵孔银白甜谢文宾苗君萍赵磊朱敦皖张琳华胡云霞王晓磊
Owner TIANJIN POLYTECHNIC UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com