Dept. of Food Science and Technology, Seoul Women's Univ., Seoul 01797, Republic of Korea.
Dept. of Food Bioscience and Technology, Korea, Univ., Seoul 02841, Korea.
J Food Sci. 2018 Apr;83(4):1011-1016. doi: 10.1111/1750-3841.14105. Epub 2018 Mar 25.
Films containing microencapsulated cinnamon oil (CO) were developed using a large-scale production system to protect against the Indian meal moth (Plodia interpunctella). CO at concentrations of 0%, 0.8%, or 1.7% (w/w ink mixture) was microencapsulated with polyvinyl alcohol. The microencapsulated CO emulsion was mixed with ink (47% or 59%, w/w) and thinner (20% or 25%, w/w) and coated on polypropylene (PP) films. The PP film was then laminated with a low-density polyethylene (LDPE) film on the coated side. The film with microencapsulated CO at 1.7% repelled P. interpunctella most effectively. Microencapsulation did not negatively affect insect repelling activity. The release rate of cinnamaldehyde, an active repellent, was lower when CO was microencapsulated than that in the absence of microencapsulation. Thermogravimetric analysis exhibited that microencapsulation prevented the volatilization of CO. The tensile strength, percentage elongation at break, elastic modulus, and water vapor permeability of the films indicated that microencapsulation did not affect the tensile and moisture barrier properties (P > 0.05). The results of this study suggest that effective films for the prevention of Indian meal moth invasion can be produced by the microencapsulation of CO using a large-scale film production system.
Low-density polyethylene-laminated polypropylene films printed with ink incorporating microencapsulated cinnamon oil using a large-scale film production system effectively repelled Indian meal moth larvae. Without altering the tensile and moisture barrier properties of the film, microencapsulation resulted in the release of an active repellent for extended periods with a high thermal stability of cinnamon oil, enabling commercial film production at high temperatures. This anti-insect film system may have applications to other food-packaging films that use the same ink-printing platform.
采用大规模生产系统开发了含有微胶囊化肉桂油 (CO) 的薄膜，以防止印度粉斑螟 (Plodia interpunctella) 的侵害。将 CO 以 0%、0.8%或 1.7%（w/w 油墨混合物）的浓度用聚乙烯醇微胶囊化。将微胶囊化的 CO 乳液与油墨（47%或 59%，w/w）和稀释剂（20%或 25%，w/w）混合，并涂覆在聚丙烯（PP）薄膜上。然后，在涂覆侧用低密度聚乙烯（LDPE）薄膜对 PP 薄膜进行层压。含有 1.7%微胶囊化 CO 的薄膜对印度粉斑螟的驱避效果最有效。微胶囊化不会对驱避活性产生负面影响。肉桂醛（一种有效的驱避剂）的释放速率在 CO 微胶囊化时比没有微胶囊化时更低。热重分析表明，微胶囊化防止了 CO 的挥发。薄膜的拉伸强度、断裂伸长率百分比、弹性模量和水蒸气透过率表明，微胶囊化不会影响拉伸和防潮性能（P > 0.05）。本研究结果表明，使用大规模薄膜生产系统通过 CO 的微胶囊化可以生产出有效防止印度粉斑螟入侵的薄膜。
使用大规模薄膜生产系统，在印有油墨的低密度聚乙烯层压聚丙烯薄膜上打印微胶囊化肉桂油，可以有效驱避印度粉斑螟幼虫。微胶囊化不会改变薄膜的拉伸和防潮性能，同时还能延长活性驱避剂的释放时间，并具有较高的肉桂油热稳定性，从而可以在高温下进行商业薄膜生产。这种防虫薄膜系统可能适用于其他使用相同油墨打印平台的食品包装薄膜。
