Earticle

초록

영어

The development of sustainable and active food packaging materials with multifunctional properties has become increasingly important to enhance food safety and extend shelf life. In this study, palladium-based carbon quantum dots (PQDs) were synthesized via a combined reduction–hydrothermal approach and incorporated into a poly(vinyl alcohol) (PVA) matrix to fabricate multifunctional nanocomposite films. The incorporation of PQDs significantly improved the functional performance of PVA films. UV–Vis analysis revealed excellent ultraviolet shielding, achieving nearly complete blocking in the UV-B region and approximately 90% attenuation in the UV-A region, while maintaining high transparency (>95%) in the visible range. X-ray diffraction results indicated a slight increase in crystallinity without disrupting the intrinsic semi-crystalline structure of PVA. The oxygen transmission rate (OTR) decreased markedly from 5.54 to 0.86 cc/m²·day with increasing PQD content, demonstrating enhanced barrier performance due to the formation of a tortuous diffusion pathway and improved structural ordering. Furthermore, the nanocomposite films exhibited strong antibacterial activity against both S. aureus and E. coli, with inhibition zones increasing in a concentration-dependent manner. Notably, an inhibition zone of 19.1 mm and 21.9 mm against S. aureus and E. coli, respectively, was achieved at only 1.0 wt.% PQDs, indicating superior antibacterial efficiency at relatively low filler loadings. The developed PVA/ PCQD nanocomposite films demonstrate a unique combination of high transparency, effective UV shielding, improved oxygen barrier properties, and strong antibacterial activity. These findings highlight their potential as advanced, ecofriendly materials for active food packaging applications.

목차

Abstract
Introduction
Materials and Methods
1. Materials
2. Synthesis of PQDs
3. Preparation of PVA/PQDs Films
4. Characterization
5. Statistical Analysis
Results and Discussion
1. Morphological Analysis of the Synthesized PQDs
2. Structural Analysis of PVA/PQD Nanocomposite Films
3. Optical Properties and UV-Blocking Performance
4. XRD analysis of PVA/PQDs nanocomposite films
5. Oxygen barrier performance of PVA/PQDs nanocompositefilms
6. Antibacterial Performance
Conclusion
Acknowledgements
References

키워드

저자

• Mohammadreza Jozaghkar [ Department of Packaging, Yonsei University, 1 Yonseidae-gil, Wonju, Kangwon-do, 26493, South Korea ]
• Sehyun Jin [ Department of Packaging, Yonsei University, 1 Yonseidae-gil, Wonju, Kangwon-do, 26493, South Korea ]
• Jamilur R. Ansari [ Department of Packaging, Yonsei University, 1 Yonseidae-gil, Wonju, Kangwon-do, 26493, South Korea ]
• Jongchul Seo [ Department of Packaging, Yonsei University, 1 Yonseidae-gil, Wonju, Kangwon-do, 26493, South Korea ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국포장학회지 [Journal of Korea Society of Packaging Science & Technology]

• 간기

  연3회

• pISSN

  1226-0207

• 수록기간

  1994~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 530 DDC 620