Multifunctional film based on gelatin with titanium dioxide and thymol@β-cyclodextrins for fresh-keeping packaging  

作　　者：Haiyu Du Tiantian Min Xiaoli Sun Xiaochun Bian Zhu Zhu Yongqiang Wen 

机构地区：[1]Beijing Key Laboratory for Bioengineering and Sensing Technology,Daxing Research Institute,School of Chemistry and Biological Engineering,University of Science and Technology Beijing,Beijing,100083,China [2]Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization,Weifang University of Science and Technology,Shouguang,China

出　　处：《Food Bioscience》2022年第6期1774-1783,共10页食品生物科学（英文）

基　　金：supported by the National Natural Science Foundation of China(32172256,21975019,52273120);the Fundamental Research Funds for the Central Universities,and University of Science and Technology Beijing(USTB).

摘　　要：Microbial infection and ethylene accumulation can cause spoilage of fresh fruit and vegetables during postharvest storage. Here, gelatin film incorporated with titanium dioxide (TiO_(2)) nanoparticles and thymol-loaded β-cyclodextrin (THY@β-CD) was prepared by the solution casting method for scavenging ethylene and inhibiting microbial growth. The scanning electron microscope and ethylene scavenging experiment showed that 1% TiO_(2) nanoparticles did not agglomerate in the gelatin film and achieved 23.1% ethylene degradation efficiency under UV light. Loading rate and thymol release behaviors indicated that thymol encapsulated in the β-CD carrier could be effectively loaded into gelatin film and avoid rapid volatilization. More importantly, TiO_(2) and thymol exhibited synergistic antimicrobial properties under UV light, achieving a 100% inhibition rate against Escherichia coli, Staphylococcus aureus, and Rhizopus stolonifer. In addition, the THY@β-CD/TiO_(2)/Gel film had good tensile strength, water solubility, and biocompatibility. And they could significantly extend the shelf life of strawberries and tomatoes. Hence, this active packaging film system provided an effective postharvest strategy for delaying ripening and avoiding microbial contamination.

关 键 词：GELATIN Titanium dioxide Thymol@β-cyclodextrin Ethylene scavenging ANTIMICROBIAL 

分 类 号：TS206.4[轻工技术与工程—食品科学]