Recyclable,non-leaching antimicrobial magnetic nanoparticles |
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Authors: | Wei Ye Lingren Wang Jie Zhao Quentin Q Fang Weihua Ming |
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Institution: | Department of Chemistry and Biochemistry, Georgia Southern University, Statesboro, GA 30460, United States; Department of Mechanical and Materials Engineering, Huaiyin Institute of Technology, Huaian 223001, China; Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China; Department of Biology, Georgia Southern University, Statesboro, GA 30460, United States |
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Abstract: | Pathogenic bacterial contaminations in water cause serious or even lethal threats. Strategies that effectively kill bacteria without causing environmental contamination are urgently needed in a wide range of applications. We prepared recyclable antimicrobial magnetic nanoparticles, Fe3O4@P(St-co-AcQAC), through surfactant-free seeded emulsion polymerization involving a polymerizable, hydrophobic quaternary ammonium compound (QAC). Fe3O4 particles were first synthesized by a solvothermal reaction, followed by functionalization with a methacrylic silane (MPS), and then copolymerized with a QAC-containing acrylic monomer (AcQAC), leading to Fe3O4@P(St-co-AcQAC) nanoparticles. As confirmed by antibacterial assays, these Fe3O4@P(St-co-AcQAC) nanoparticles exhibited strong antimicrobial action against both Gram-positive Staphylococcus epidermidis and Gram-negative Escherichia coli, without leaching out any bactericidal agent. An additional benefit of antimicrobial magnetic particles is that they can be easily recycled while maintaining excellent antimicrobial efficacy. |
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Keywords: | Antimicrobial Quaternary ammonium compound (QAC) Contact killing Magnetic particles Recyclability |
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