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Preparation method of high-solid-content and high-strength copper alginate antibacterial filtering membrane

A technology of copper alginate and high solid content, which is applied in the fields of functional materials and membrane separation, waste cuproammonia solution, hydrogel, and filtration membrane, and can solve the problem of poor strength of alginate hydrogel, low solid content, alginic acid Calcium hydrogel is not antibacterial and other problems

Pending Publication Date: 2022-03-04
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is that the calcium alginate hydrogel is not antibacterial, the strength of the alginate hydrogel is poor, and the solid content is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a) preparing a mixture aqueous solution with a concentration of 0.05% by mass of sodium alginate and a mixture of 0.01% by mass of titanium dioxide as a casting solution, and set aside after defoaming;

[0020] b) copper acetate is dissolved in ethanol as a coagulation bath;

[0021] c) Pour the casting solution obtained in step a) onto a clean glass plate, and scrape it flat with a glass rod with a diameter of 10 μm copper wires wound at both ends, and then immediately remove the glass plate and the scraped film Soaked into the coagulation bath obtained in step b), the copper acetate dissolved in ethanol is also dissolved in the aqueous solution, so the copper ions diffuse into the casting solution for cross-linking to obtain a copper alginate hydrogel film. At the same time, the casting solution and The water in the hydrogel diffuses into ethanol, and sodium alginate is insoluble in ethanol, so a copper alginate hydrogel film with high solid content is obtained; as th...

Embodiment 2

[0024] a) preparing a mixture aqueous solution in which the mass percent concentration of sodium alginate is 5%, and the mass percent concentration of carboxylated multi-walled carbon nanotubes is 5% as a casting solution, which is set aside after defoaming;

[0025] b) copper acetate is dissolved in ethanol as a coagulation bath;

[0026] c) Pour the casting solution obtained in step a) onto a clean glass plate, and scrape it flat with a glass rod with a diameter of 1000 μm copper wires wound at both ends, and then immediately remove the glass plate and the scraped film Soaked into the coagulation bath obtained in step b), the copper acetate dissolved in ethanol is also dissolved in the aqueous solution, so the copper ions diffuse into the casting solution for cross-linking to obtain a copper alginate hydrogel film. At the same time, the casting solution and The water in the hydrogel diffuses into ethanol, and sodium alginate is insoluble in ethanol, so a copper alginate hydr...

Embodiment 3

[0029] a) The mass percentage concentration of preparing sodium alginate is 2%, and the mass percentage concentration of graphene oxide is 2% mixture aqueous solution as the casting liquid, and it is set aside after defoaming;

[0030] b) copper acetate is dissolved in ethanol as a coagulation bath;

[0031] c) Pour the casting solution obtained in step a) onto a clean glass plate, scrape it flat with a glass rod with a diameter of 200 μm copper wires wound at both ends, and then immediately remove the glass plate and the scraped film Soaked into the coagulation bath obtained in step b), the copper acetate dissolved in ethanol is also dissolved in the aqueous solution, so the copper ions diffuse into the casting solution for cross-linking to obtain a copper alginate hydrogel film. At the same time, the casting solution and The water in the hydrogel diffuses into ethanol, and sodium alginate is insoluble in ethanol, so a copper alginate hydrogel film with high solid content is ...

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Abstract

Aiming at the problems that alginate hydrogel is poor in strength, low in solid content and not resistant to bacteria, the invention reports a preparation method of a high-solid-content and high-strength copper alginate antibacterial filtering membrane. Firstly, a mixture aqueous solution of a reinforcing agent and sodium alginate is prepared as a membrane casting solution; meanwhile, dissolving cupric acetate into ethanol to serve as a coagulating bath; scraping the membrane casting solution into a membrane, soaking the membrane casting solution into a coagulating bath, and dispersing copper ions into a sodium alginate solution for crosslinking because copper acetate dissolved in ethanol is also dissolved in an aqueous solution, so as to obtain the copper alginate hydrogel. Meanwhile, water in the hydrogel diffuses into ethanol, and sodium alginate is not dissolved into ethanol, so that the copper alginate hydrogel film with high solid content is obtained. Due to high solid content, the strength of the membrane is greatly improved. The preparation method is simple, and the obtained high-solid-content and high-strength copper alginate antibacterial filtering membrane has wide application prospects in the fields of sewage treatment, dye desalination, antibiotic removal and the like.

Description

technical field [0001] The invention relates to a preparation method of a copper alginate antibacterial filter membrane with high solid content and high strength, belonging to the field of functional materials and membrane separation. [0002] The invention relates to the technical fields of waste copper ammonia solution, filter membrane, hydrogel and the like. In particular, it relates to a preparation method of a copper alginate antibacterial filter membrane with high solid content and high strength. Background technique [0003] Traditional sewage treatment methods usually have complex equipment operations, high energy consumption, and secondary pollution. Membrane separation technology, as an environmentally friendly new technology, can solve such problems well and is currently the most promising water treatment method. One of the processing techniques. Traditional filtration membranes are usually made of inorganic materials, organic polymer materials or inorganic-orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02
CPCB01D67/0011B01D67/0013B01D67/0016B01D69/02B01D2325/48B01D2325/24B01D2323/30
Inventor 赵孔银杨振浩王文爽洪乙丹李易哲丁永娇张世潮余俊民杨欣康
Owner TIANJIN POLYTECHNIC UNIV
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