Antibacterial flaky silver-coated copper powder, preparation method thereof and antibacterial fabric

By coating the surface of flake copper powder with a silver shell and depositing an alumina protective layer, the problems of uneven preparation and easy detachment of silver-coated copper powder in the textile antibacterial field are solved, thereby improving antibacterial performance and oxidation resistance, and reducing costs.

CN122252601APending Publication Date: 2026-06-23HEFEI SUNRISE PIGMENTS
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI SUNRISE PIGMENTS
Filing Date
2026-05-27
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing silver-coated copper powder has problems such as uneven preparation, easy detachment of silver layer, poor oxidation resistance, and insufficient resistance to sulfur corrosion in the textile antibacterial field, which limits its application in high-end fields.

Method used

Antibacterial flake-shaped silver-coated copper powder was prepared by coating the surface of flake copper powder with a silver shell and depositing an alumina protective layer, using an activating dispersant to form a dense silver shell to enhance interfacial bonding, and depositing an alumina layer in the vapor phase to improve oxidation resistance.

Benefits of technology

It achieves uniform and dense coating of silver-coated copper powder, enhances the bonding force between the silver layer and the copper core, improves antibacterial properties and oxidation resistance, reduces production costs, and is suitable for antibacterial fabrics.

โœฆ Generated by Eureka AI based on patent content.

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Abstract

The application provides antibacterial flaky silver-coated copper powder, a preparation method thereof and antibacterial fabric, and the preparation method comprises the following steps: mixing flaky copper powder with an alkaline solution to perform alkali washing to remove oil, to obtain pretreated copper powder; then, the pretreated copper powder is dissolved in water with an activation dispersant to perform activation and dispersion, to obtain an activated copper powder solution; a complexing agent is added into the activated copper powder solution, and the pH value is adjusted to weak alkalinity; then, a reducing agent solution and a silver-ammonia solution are added to perform a reduction reaction, to obtain flaky silver-coated copper powder; the flaky silver-coated copper powder is mixed with an aluminum source precursor to perform a gas phase chemical deposition reaction, to obtain flaky silver-coated copper powder with an alumina layer on the surface, i.e., the antibacterial flaky silver-coated copper powder; and the activation dispersant is obtained by addition reaction of polyvinylpyrrolidone and aminobenzenesulfonic acid. The antibacterial flaky silver-coated copper powder obtained by the application can completely replace pure silver material to some extent, can reduce the cost, and can effectively improve the antibacterial performance of the fabric after finishing modification.
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