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A kind of preparation method of copper phosphate-containing alginate hydrogel antibacterial filter membrane

A technology of alginate and hydrogel, applied in the field of filtration membrane, antibacterial, functional material and membrane separation, hydrogel, can solve the problem of low strength of calcium alginate hydrogel filtration membrane, traditional membrane does not have antibacterial function, Easy to be degraded by bacteria, etc., to achieve good anti-pollution performance, green and environmentally friendly preparation process, and simple preparation method

Active Publication Date: 2021-10-01
中科瑞阳膜技术(北京)有限公司
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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 traditional membrane does not have antibacterial function, poor hydrophilicity, low strength of calcium alginate hydrogel filtration membrane, easy to be degraded by bacteria, etc.
[0009] The technical solution of the present invention to solve the problems that the traditional membrane does not have antibacterial function, poor hydrophilicity, calcium alginate hydrogel filtration membrane strength is low, easy to be degraded by bacteria, etc. is to provide a copper phosphate-containing alginate hydrogel Preparation method of antibacterial filter membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] a) preparing a mixture aqueous solution of diammonium hydrogen phosphate with a mass percentage concentration of 0.1% and sodium alginate with a mass percentage concentration of 0.2%, and standing for defoaming to obtain a casting solution;

[0021] b) preparing an aqueous calcium chloride solution with a mass percentage concentration of 0.2% as the first coagulation bath; preparing dilute hydrochloric acid and an aqueous copper chloride solution with a mass percentage concentration of 0.2% as the second coagulation bath;

[0022] c) Pour the casting solution obtained in step a) onto a dry and clean glass plate, scrape it flat with a glass rod with a diameter of 20 μm copper wires wound at both ends, and then immediately put the glass plate and the scraped film into step b) Soak in the obtained first coagulation bath for 5min to obtain a calcium alginate / calcium phosphate hydrogel film; while calcium chloride reacts with sodium alginate to generate calcium alginate hydro...

Embodiment 2

[0025] a) preparing a mixture aqueous solution of disodium hydrogen phosphate with a mass percentage concentration of 20% and sodium alginate with a mass percentage concentration of 8%, and standing for defoaming to obtain a casting solution;

[0026] b) preparing an aqueous calcium nitrate solution with a mass percentage concentration of 20% as the first coagulation bath; preparing dilute hydrochloric acid and an aqueous copper nitrate solution with a mass percentage concentration of 20% as the second coagulation bath;

[0027] c) Pour the casting solution obtained in step a) onto a dry and clean glass plate, scrape it flat with a glass rod with a diameter of 1500 μm copper wire wound at both ends, and then immediately put the glass plate and the scraped film into step b) Soak in the obtained first coagulation bath for 240min to obtain a calcium alginate / calcium phosphate hydrogel film; while calcium nitrate reacts with sodium alginate to generate calcium alginate hydrogel, it...

Embodiment 3

[0030] a) preparing a mixture aqueous solution of dipotassium hydrogen phosphate with a mass percentage concentration of 10% and sodium alginate with a mass percentage concentration of 5%, and standing for defoaming to obtain a casting solution;

[0031] b) preparing an aqueous calcium gluconate solution with a mass percentage concentration of 10% as the first coagulation bath; preparing dilute hydrochloric acid and an aqueous copper nitrate solution with a mass percentage concentration of 10% as the second coagulation bath;

[0032] c) Pour the casting solution obtained in step a) onto a dry and clean glass plate, scrape it flat with a glass rod with a diameter of 1000 μm copper wire wound at both ends, and then immediately put the glass plate and the scraped film into step b) Soak 200min in the obtained first coagulation bath, obtain calcium alginate / calcium phosphate hydrogel film; Dipotassium hydrogen generates calcium phosphate, calcium phosphate and alginate are cross-link...

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Abstract

The invention discloses a preparation method of an alginate hydrogel antibacterial filter membrane containing copper phosphate. First, the soluble phosphate and sodium alginate are fully mixed and dissolved to obtain a casting solution. The casting solution is scraped into a film and immersed in a soluble calcium salt solution to fully cross-link, and at the same time as the calcium alginate hydrogel is formed, calcium phosphate is generated in situ in the hydrogel. Then the obtained calcium alginate hydrogel film containing calcium phosphate is soaked in the aqueous solution of the mixture of dilute hydrochloric acid and soluble copper salt, the dilute hydrochloric acid reacts with calcium phosphate to release phosphate, and the phosphate reacts with copper ions to form copper phosphate. Copper ions can capture part of the calcium ions in calcium alginate to generate copper alginate, thereby obtaining an antibacterial filter membrane of alginate hydrogel containing copper phosphate. The in situ generated phosphate in the hydrogel improved the mechanical properties of the alginate hydrogel, and the copper phosphate endowed the alginate hydrogel with good antibacterial properties.

Description

technical field [0001] The invention relates to a preparation method of an alginate hydrogel antibacterial filter membrane containing copper phosphate, 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 an alginate hydrogel antibacterial filter membrane containing copper phosphate. Background technique [0003] Water scarcity and pollution widely affect the sustainable development of industries and social activities, and are one of the most critical global challenges facing mankind in the 21st century. Currently, a series of sustainable water purification technologies have been developed, such as air flotation, flocculation, adsorption, distillation, and advanced oxidation processes (AOPs). However, complex pollutants in wastewater (such as inorganic salts, organic matter, and microorganism...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/74B01D67/00C08L5/04C08K3/32C08J5/18C02F1/44
CPCB01D67/0079B01D71/74B01D2325/24B01D2325/48C02F1/44C08J5/18C08J2305/04C08K2003/328Y02A20/131
Inventor 赵孔银谢慧珂郭智龙苗君萍帅佳麒张静雯路子杰王晓磊魏俊富
Owner 中科瑞阳膜技术(北京)有限公司
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