2026-06-30 九州大学
参考図：CQDs含有フィルムによるミニトマトの保存効果 （出典（一部改変）：Reshaka Kavindi et al., Food Research International (2026), CC BY 4.0）
＜関連情報＞
- https://www.kyushu-u.ac.jp/ja/researches/view/1511
- https://www.sciencedirect.com/science/article/pii/S0963996926010215?via%3Dihub
カボチャの皮の廃棄物由来のカーボン量子ドットで強化されたカルボキシメチルセルロース／ゼラチン複合材料を用いた活性食品包装の開発 Development of active food packaging using carboxymethyl cellulose/gelatin composites reinforced with carbon quantum dots derived from pumpkin peel waste
M.A. Reshaka Kavindi, Francis Ngwane Nkede, Fanze Meng, Mohammad Hamayoon Wardak, Yan Xirui, Tanvir Ahamed, Fumina Tanaka, K.S.P. Amaratunga, Fumihiko Tanaka
Food Research International Available online: 30 April 2026
DOI:https://doi.org/10.1016/j.foodres.2026.119344
Highlights
- CMC/Gel based biodegradable films were prepared with pumpkin peel waste derived carbon nanofiller.
- Films with CMC/Gel/PP_CQDs 3% presented excellent UV-blocking and antioxidant capacity.
- Incorporation of CQDs enhanced the mechanical properties as well as water contact angle.
Abstract
Carbon quantum dots (CQDs) were synthesized from pumpkin peel waste by a hydrothermal method and embedded in carboxymethyl cellulose (CMC) and gelatin (Gel) to develop a biodegradable and functional food packaging for preserving fruits. The CQDs were uniformly dispersed in the CMC/Gel solution, forming an unbroken, compact film with strong bonds within the polymer chains. The tensile strength of CQDs incorporated films increased by 78–147% compared to the control sample. Interestingly, the 3% CQDs concentrated on film exhibited 72.5 ± 1.3% and 94.3 ± 2.1% UV-A and UV-B blocking capabilities, respectively, while the water vapor permeability decreased by 12.32%. Also, the water contact angle of the films was expanded by 12.87–26.14% with the addition of CQDs. The CMC/Gel/PP_CQDs 3% film exhibited the potent antioxidant efficacy (88.58%) against the DPPH. CQDs incorporated formulations did show a strong resistance effect against the microbial pathogens and non-toxic at concentrations below 2 mg/mL in the human colorectal adenocarcinoma cells (Caco-2) lines. Cherry tomatoes packaged with CMC/Gel/PP_CQDs 3% composite film exhibited the best quality preservation among all the formulations.
