微射流均质对羧甲基纤维素—精油可食性膜性能的影响

Effects of micro-fluidization homogenization on properties of CMC-essential oil edible film

采用微射流均质技术制备羧甲基纤维素(CMC)—精油纳米乳成膜液,研究微射流均质对成膜液理化特性及可食性膜物理和机械特性的影响,探讨CMC-精油纳米乳成膜液理化特性与膜性能之间的关系。结果表明,微射流均质可显著降低CMC-精油成膜液的平均粒径(P<0.05),均质处理后不同精油纳米乳成膜液的ξ-电势值不同,变化范围为-37.63^-59.67 mV。与 CMC可食性膜相比,CMC-精油纳米乳可食性膜的水蒸气透过性显著降低(P<0.05)。CMC-肉桂和CMC-牛至精油纳米乳可食性膜具有较高的透明度。CMC-牛至精油纳米乳可食性膜柔韧性最好。采用微射流均质处理CMC-精油成膜液可使所成膜具有更好的物理和机械特性。

It was focused on the evaluation of physical and mechanical properties of carboxymethyl cellulose-based edible films formed from nanoemulsions of EOs (essential oils) in this study. Nanoemulsions containing clove essential oil, cinnamon essential oil or oregano essential oil as dispersed phase and carboxymethyl cellulose solution as continuous phase were prepared. The average droplet size of nanoemulsions was reduced after the microfluidization homogenization treatment. The ξ-potentials of nanoemuls-ions were between -37.63^-59.67 mV depending on the type of EO used. The films formed from clove and oregano essential oil nanoemulsions exhibited higher transparency and water vapor resistance than those from cinnamon essential oil. The films formed from oregano essential oil exhibited higher flexibility than those from clove and cinnamon essential oil. The results indicated that it was suitable to use nanoemulsions with active components for the preparation of the edible films, with better physical and mechanical properties.