Chitosan edible coatings with cellulose nanocrystals Pickering emulsions were investigated at different oleic acid concentrations as coatings to extend storage of ‘Bartlett’ pears by delaying ripening. Pear coatings contained 10 or 20 g oleic acid/kg emulsion (1OA, 2OA). A 7-month simulated industrial storage trial (−1.1 °C) was conducted against carnauba wax-based coating, controlled atmosphere storage (CAS), and uncoated control. The 2OA maintained the highest peel chlorophyll (P < 0.05) when ripened after 3 months, significantly higher than control and carnauba wax throughout the 7 months. Respiration rate and ethylene production peak of 2OA and CAS pears while ripening in ambient conditions were delayed 2 months compared with control pears, and ethylene production peak of 2OA pears had the lowest intensity (31.91 μL/Lgh), significantly (P < 0.05) lower than CAS and control pears. When ripened after 7 months, 2OA and 1OA pears maintained equivalent titratable acidity (∼0.23 g/100 mL) and total soluble solids (12.8 g/100 g) to each other, significantly (P < 0.05) different from all other treatments. The 2OA emulsion coating therefore preserved ‘Bartlett’ pears better than 1OA and carnauba wax coatings and competitively with CAS, providing a feasible and accessible postharvest preservation alternative.

研究了具有纤维素纳米晶体的壳聚糖可食用涂料在不同油酸浓度下的Pickering乳液作为涂料，通过延迟成熟来延长'Bartlett'梨的贮藏。梨皮涂料包含10或20 g油酸/ kg乳液（10A，2OA）。针对巴西棕榈蜡基涂料，可控气氛储存（CAS）和未涂层对照，进行了为期7个月的模拟工业储存试验（-1.1°C）。3个月后成熟时，2OA保持最高的果皮叶绿素含量（P <0.05），在整个7个月中均显着高于对照和巴西棕榈蜡。与对照梨相比，在环境条件下成熟的2OA和CAS梨的呼吸速率和乙烯产量峰值延迟了2个月，而2OA梨的乙烯产量峰值强度最低（31.91μL/ Lgh），显着（P <0.05）低于CAS和对照梨。在7个月后成熟后，2OA和10A梨彼此保持相等的可滴定酸度（〜0.23 g / 100 mL）和总可溶性固形物（12.8 g / 100 g），与所有其他处理方法差异显着（P <0.05）。因此，2OA乳胶衣的“巴特利特”梨的保鲜性优于10A和巴西棕榈蜡质的保鲜剂，并且与CAS具有竞争优势，提供了可行且易于获得的收获后保鲜替代品。