Abstract：
This study aimed to investigate the potential application of cellulose nanocrystals (CNCs) extracted from an agricultural waste for encapsulation of oregano essential oil (OEO) and subsequently their use for coating to improve the shelf life of pears as a model. By hydrolyzing hazelnut shell cellulose under the optimum conditions, high crystalline CNCs with a zeta potential of -67.8 ± 4.4 mV and a diameter of 157 ± 10 nm were produced. Different concentrations of OEO (10-50 % w/w) were incorporated into CNCs and characterized using FTIR, XRD, SEM and TEM. OEO containing 50 % CNC with the highest EE and LC was selected for coating. Pears were coated with gluten containing 0.5, 1.5 and 2 % encapsulated OEO (EOEO) and pure OEO and stored for 28 days. Physicochemical, microbial and sensory properties of the pears were examined. Microbial analysis showed that EOEO2% was more effective in controlling microbial growth than controls and pure OEO, and a 1.09 Log reduction in bacterial count was recorded on day 28 of storage when compared to control. It was concluded that CNCs produced from an agricultural waste and loaded on an essential oil could be used to extend the shelf life of pear and potentially other fruits.
摘要：
这项研究旨在研究从农业废物中提取的纤维素纳米晶体（CNCs）用于封装牛至精油（OEO）的潜在应用，并随后将其用于涂层以改善梨的保质期作为模型。通过在最佳条件下水解榛子壳纤维素，产生具有-67.8±4.4mV的ζ电位和157±10nm的直径的高结晶CNCs。将不同浓度的OEO（10-50％w/w）掺入CNCs中，并使用FTIR进行表征。XRD,SEM和TEM。选择含有50%CNC且具有最高EE和LC的OEO用于涂覆。用含有0.5、1.5和2%包封的OEO(EOEO)和纯OEO的谷蛋白包被梨并储存28天。物理化学,研究了梨的微生物和感官特性。微生物分析表明，EOO2％比对照和纯OEO更有效地控制微生物生长，并且当与对照相比时,在储存的第28天记录到细菌计数的1.09Log减少。结论是，由农业废物产生并装载在精油上的CNCs可用于延长梨和其他水果的保质期。
