Antibacterial hydrogel in multi-driving mode and preparation method and application thereof

By preparing a multi-actuated antibacterial hydrogel containing Fe3O4/CuS nanoparticles and combining it with PAM and PNIPAM gel layers, the problem of weak antibacterial performance of the hydrogel actuator during deformation was solved, and efficient catalytic antibacterial effects under photothermal and temperature driving were achieved.

CN119431826BActive Publication Date: 2025-10-10SICHUAN UNIV
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Patent Information

Application Number
CN202411576256.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-06
Publication Date
2025-10-10
Estimated Expiration
2044-11-06

AI Technical Summary

Technical Problem

Existing hydrogel actuators have weak antibacterial properties during deformation and actuation, making it difficult to effectively improve catalytic antibacterial capabilities under multiple actuation modes.

Method used

By preparing an antibacterial hydrogel with multiple driving modes, Fe3O4/CuS nanoparticles were used as functional particles, combined with PAM and PNIPAM gel layers, and deformation was achieved by utilizing photothermal conversion and temperature changes, and the antibacterial performance was enhanced during the deformation process.

Benefits of technology

The multi-driving modes of the hydrogel under light, heat and temperature changes were realized, which improved the antibacterial performance and enhanced the catalytic antibacterial ability, especially the broad-spectrum antibacterial effect against Escherichia coli and Staphylococcus aureus under light conditions.

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Abstract

The application discloses a multi-driving mode antibacterial hydrogel and a preparation method and application thereof, wherein the preparation method comprises the following steps: uniformly mixing functional particles, AM and BIS to obtain a first layer precursor solution; uniformly mixing NIPAM, polyethylene glycol and BIS to obtain a second layer precursor solution; adding tetramethyl ethylenediamine and potassium persulfate into the first layer precursor solution to obtain a first solution, and the first solution is reacted to form a first layer of the antibacterial hydrogel; adding tetramethyl ethylenediamine and potassium persulfate into the second layer precursor solution to obtain a second solution, and the second solution is reacted to form a second layer of the antibacterial hydrogel, and the second layer is connected with the first layer. The antibacterial hydrogel can be deformed in response to light and heat, thereby completing specific functions in specific application scenarios. Meanwhile, in the driving deformation process, the contact surface of the antibacterial hydrogel and pollutants can be expanded, the functional particles are better dispersed in the first layer, more reaction sites are exposed, and the antibacterial performance is greatly improved.
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