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Silver nanoparticles were synthesized from cabbage (Brassica oleracia capitate) extract following green chemistry approach and characterized by UV–Vis spectroscopy, DLS, SEM and FT-IR. Furthermore, PVA hydrogel patches loaded with these green synthesized AgNPs and AgNP/clay/activated carbon biocomposites were designed and developed by Freeze-thaw method and their characterization was done by FT-IR and SEM. Swelling studies for these hydrogel patches were performed and overall thickness of these hydrogel patches lied between 0.34 and 0.36 mm. Antibacterial activity of hydrogel patches (10% aqueous soln.) was checked against two representative bacterial strains (Staphylococcus aureus and Escherichia coli) using microdilution method. The minimum inhibitory concentration (MIC) of AgNP-HP and AgNP-Bc-HP for Staphylococcus aureus was 25 μg/mL and 12.5 μg/mL respectively …