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

Application Number
CN202610739944.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
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.

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Abstract

The invention provides antibacterial flaky silver-coated copper powder, a preparation method thereof and an antibacterial fabric, and the preparation method comprises the following steps: mixing flaky copper powder with an alkaline solution for alkali washing and oil removal to obtain pretreated copper powder, and then dissolving the pretreated copper powder and an activation dispersant in water for activation and dispersion to obtain an activated copper powder solution; a complexing agent is added into the activated copper powder solution, the pH is adjusted to be alkalescent, then a reducing agent solution and a silver-ammonia solution are added for a reduction reaction, and then flaky silver-coated copper powder is obtained; the preparation method comprises the following steps: mixing flaky silver-coated copper powder with an aluminum source precursor, and carrying out chemical vapor deposition reaction to obtain flaky silver-coated copper powder coated with an aluminum oxide layer on the surface, namely the antibacterial flaky silver-coated copper powder, the activating dispersant is obtained by carrying out addition reaction on polyvinylpyrrolidone and aminobenzene sulfonic acid. The obtained antibacterial flaky silver-coated copper powder can completely replace a pure silver material to a certain extent, the cost is reduced, and meanwhile the antibacterial performance of the antibacterial flaky silver-coated copper powder used for fabric finishing modification is effectively improved.
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