APTES-Enabled AgNP Immobilization on Zinc Silicate Glass for Well-Dispersed, Stable, and Long-Lasting Antibacterial PLA Composites
발표자
박종진 (서울대학교)
연구책임자
이종찬 (서울대학교)
공동저자
박종진 (서울대학교), 이종찬 (서울대학교), 김재준 (서울대학교)
초록
내용
Zinc silicate glass powder (ZS) is an inorganic antibacterial filler capable of releasing zinc ions and enhancing surface hydrophilicity. Silver nanoparticles (AgNPs) exhibit antibacterial activity against bacteria through contact killing and ion release mechanisms. To effectively utilize these antibacterial components in biodegradable polymer systems, ZS was incorporated into polylactic acid (PLA), and AgNPs were subsequently immobilized onto bare ZS and APTES-modified ZS, yielding Ag@ZS and Ag@aZS, respectively. Compared to neat PLA, the PLA composites containing ZS exhibited significant antibacterial activity against E. coli, while Ag@ZS and Ag@aZS enabled outstanding antibacterial performance against both E. coli and S. aureus at remarkably low filler contents. In particular, the APTES-modified Ag@aZS enhanced AgNP loading efficiency and interfacial compatibility with PLA, leading to improved mechanical properties, optical transparency, and long-term antibacterial efficacy.