In this study, zinc-doped carbon dots (Zn-GPCDs) were synthesized using a hydrothermal synthesis method with ginger peel waste and applied to a carrageenan-based active packaging film. FT-IR spectroscopic analysis revealed that the Zn-GPCDs exhibited characteristic surface functional groups, including specific Zn-O coordination bonds. The effects of zinc doping on the structural and functional performance of the composite film were compared and analyzed. Due to zinc doping, the free radical scavenging ability of Zn-GPCDs was slightly reduced compared to non-doped GPCDs. However, it acted as an important functional trigger for antimicrobial efficacy. Zn-GPCDs exhibited significant antimicrobial activity against Staphylococcus aureus (20.92 ± 0.99 mm) and Salmonella enterica (21.60 ± 1.04 mm), effectively overcoming the functional limitations of non-doped GPCDs. The carrageenan/Zn-GPCDs composite film exhibited stable mechanical properties, maintaining a tensile strength of 16.36 ± 2.00 MPa and an elongation at break of 12.40 ± 3.79%. In addition, the composite film showed excellent UV-blocking properties at wavelengths below 400 nm and achieved an ABTS radical scavenging ability of approximately 88% through a synergistic effect that enhanced antioxidant activity. These results suggest the potential for Zn-GPCDs-containing carrageenan films to be utilized as sustainable active packaging materials with antioxidant, antibacterial, and UV-blocking functions.
목차
Abstract 서론 재료 및 방법 1. 실험 재료 2. Gi-peel 제조 및 탄소점(GPCDs, Zn-GPCDs) 합성 3. 카라기난 기반 복합 필름의 제조 4. 액상 시료 및 복합 필름의 표면 작용기 분석 5. Gi-peel, GPCDs, 및 Zn-GPCDs 항균 효과 분석 6. Gi-peel, GPCDs, Zn-GPCDs 및 복합 필름의 항산화효과 7. 기계적 물성 분석 8. 복합 필름의 광학적 특성 및 색도 분석 9. 통계처리 결과 및 고찰 1. Gi-peel, GPCDs 및 Zn-GPCDs 용액 특성 분석 2. Car, Car/GPCDs, 및 Car/Zn-GPCDs 복합 필름 특성 요약 감사의 글 참고문헌