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Preparation method of alginate hydrogel antibacterial filter membrane containing copper phosphate

A technology of alginate and hydrogel, which is applied in the fields of antibacterial, hydrogel, functional material and membrane separation, and filtration membrane, which can solve the problem of low strength of calcium alginate hydrogel filtration membrane, traditional membranes without 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: 2020-02-11
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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PUM

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Abstract

The invention discloses a preparation method of an alginate hydrogel antibacterial filter membrane containing copper phosphate. The method comprises the following steps: fully mixing and dissolving soluble phosphate and sodium alginate to obtain a membrane casting solution; scraping the membrane casting solution to form a membrane, soaking the membrane in an aqueous soluble calcium salt solution for sufficient crosslinking, and generating calcium phosphate in situ in the hydrogel while generating a calcium alginate hydrogel; and soaking the obtained calcium alginate hydrogel membrane containing calcium phosphate in an aqueous solution of a mixture of diluted hydrochloric acid and a soluble copper salt, reacting the diluted hydrochloric acid with calcium phosphate to release phosphate radicals, reacting the phosphate radicals with copper ions to generate copper phosphate, and capturing parts of calcium ions in calcium alginate by the copper ions to generate copper alginate in order to obtain the alginate hydrogel antibacterial filter membrane containing copper phosphate. Phosphate generated in situ in the hydrogel improves the mechanical properties of the alginate hydrogel, and thecopper phosphate makes the alginate hydrogel have 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 Applications(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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