Fe₃O₄ nanoparticle loaded with silver ion was prepared as a more efficient, safer, and less environmentally hazardous silver-based antibacterial nanomaterial. The Fe₃O₄ nanoparticle was modified using 3-aminopropyl trimethoxysilane (APTMS) to enhance the silver ion adsorption capacity and antibacterial activity. Silver ions were adsorbed on pristine Fe₃O₄ and Fe₃O₄@NH₂ to enhance antibacterial activity. Energy dispersive spectroscopy (EDS) results showed that Fe₃O₄ adsorbed 2.74 wt% of Ag, whereas Fe₃O₄@NH₂ adsorbed 9.88 wt%. Pristine Fe₃O₄NP, silver ion loaded Fe₃O₄ (Fe₃O₄-Ag), and silver ion loaded Fe₃O₄@NH₂ (Fe₃O₄@NH₂-Ag) were used to manufacture carrageenan-based composite films. Compared with Fe₃O₄-Ag, Fe₃O₄@NH₂-Ag exhibited stronger antimicrobial activity against E. coli (8.82 vs. 5.02 log reduction) and L. monocytogenes (10.09 vs. 3.93 log reduction). While the addition of Fe₃O₄ significantly reduced the WCA of the carrageenan films from 61.1 ± 5.4 ° to 37.2 ± 2.1 °, the additions of Fe₃O₄-Ag and Fe₃O₄@NH₂-Ag reduced the WCA of the film to a lesser extent (56.9 ± 4.6 ° and 56.9 ± 4.6 °, respectively). Fe₃O₄NP also improved the thermal stability of carrageenan over Fe₃O₄@NH₂-Ag (22 °C vs. 13 °C) and UV blocking properties (T₂₈₀, 0.1 ± 0.0 % vs. 3.3 ± 1.5 %).

负载银离子的Fe ₃ O ₄纳米颗粒被制备为一种更有效、更安全、对环境危害更小的银基抗菌纳米材料。使用3-氨基丙基三甲氧基硅烷（APTMS）对Fe ₃ O ₄纳米颗粒进行改性，以提高银离子吸附能力和抗菌活性。银离子吸附在原始的 Fe ₃ O ₄和 Fe ₃ O ₄ @NH _{2 上}以增强抗菌活性。能量色散谱 (EDS) 结果表明 Fe ₃ O ₄吸附了 2.74 wt% 的 Ag，而 Fe ₃ O ₄@NH ₂吸附了9.88wt %。使用原始 Fe ₃ O ₄ NP、负载银离子的 Fe ₃ O ₄ (Fe ₃ O ₄ -Ag) 和负载银离子的 Fe ₃ O ₄ @NH ₂ (Fe ₃ O ₄ @NH ₂ -Ag) 来制造卡拉胶基复合薄膜。与 Fe ₃ O ₄ -Ag相比，Fe ₃ O ₄ @NH ₂ -Ag 对大肠杆菌（8.82 对 5.02 log 减少）和单核细胞增生李斯特菌表现出更强的抗菌活性（10.09 与 3.93 对数减少）。Fe ₃ O _{4 的添加}显着降低了角叉菜胶薄膜的 WCA 从 61.1 ± 5.4 ° 到 37.2 ± 2.1 °，Fe ₃ O ₄ -Ag 和 Fe ₃ O ₄ @NH ₂ -Ag 的添加降低了 WCA薄膜在较小程度上（分别为 56.9 ± 4.6 ° 和 56.9 ± 4.6 °）。的Fe ₃ ö ₄ NP也改善卡拉胶的热稳定性，在铁₃ ö ₄ @NH ₂ -Ag（22℃对13℃）和UV阻挡性质（T ₂₈₀，0.1±0.0％和3.3±1.5％ ）。