Pham Thi Lan, Nguyen Manh B, Bui Van Cuong, Nguyen Thi Xuyen, T A Savitskaya, Le-Deygen Irina, Thai Hoang, Tran Dai Lam
Institute for Tropical Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam.
RSC Adv. 2024 Aug 16;14(35):25802-25810. doi: 10.1039/d4ra04207g. eCollection 2024 Aug 12.
In this study, a TiO material with nanoparticle size of about 10-20 nm, surface area of 109 m g was synthesized using the microwave-assisted hydrothermal method. The chitosan/TiO film combined with cyclodextrin (chitosan-cyclodextrin/TiO, CS-CD/TiONPs) helps significantly improve the mechanical properties and enhance the antibacterial activity of the polymer film. Furthermore, the content of TiO nanoparticles in CS-CD/TiONPs also affects the tensile strength, antibacterial activity, ripening rate, ethylene production rate, and water vapor permeability during food preservation of the CS-CD film that has been studied. The CS-CD/TiONPs film is effective against Gram-negative bacteria () and Gram-positive bacteria () reaching over 99.5% after 15 min of contact. The preservation ability of avocados coated with CS-CD/TiONPs was evaluated through some physiological parameters of the avocados, such as sensory evaluation, weight loss, and hardness. The results show that the use of CS-CD/TiONPs films extends the preservation time of avocados up to 7 days under conditions of 30 °C and 80% relative humidity.
在本研究中，采用微波辅助水热法合成了纳米颗粒尺寸约为10 - 20 nm、表面积为109 m²/g的TiO材料。壳聚糖/TiO薄膜与环糊精结合（壳聚糖 - 环糊精/TiO，CS - CD/TiONPs）有助于显著改善聚合物薄膜的机械性能并增强其抗菌活性。此外，CS - CD/TiONPs中TiO纳米颗粒的含量还会影响所研究的CS - CD薄膜在食品保鲜过程中的拉伸强度、抗菌活性、成熟率、乙烯产生率和水蒸气透过率。CS - CD/TiONPs薄膜对革兰氏阴性菌（）和革兰氏阳性菌（）有效，接触15分钟后杀菌率超过99.5%。通过牛油果的一些生理参数，如感官评价、失重和硬度，评估了涂覆CS - CD/TiONPs的牛油果的保鲜能力。结果表明，在30°C和80%相对湿度条件下，使用CS - CD/TiONPs薄膜可将牛油果的保鲜时间延长至7天。
