Uranga Jone, Nguyen Bach T, Si Trung Trang, Guerrero Pedro, de la Caba Koro
BIOMAT Research Group, University of the Basque Country (UPV/EHU), Escuela de Ingeniería de Gipuzkoa, Plaza de Europa 1, 20018 Donostia-San Sebastián, Spain.
Faculty of Food Technology, Nha Trang University, 02 Nguyen Dinh Chieu Street, Nha Trang City 650000, Vietnam.
Polymers (Basel). 2020 Feb 2;12(2):291. doi: 10.3390/polym12020291.
The aim of this work was to assess the effect of fish gelatin-citric acid nucleophilic substitution and agar-citric acid esterification reactions on the properties of agar/fish gelatin films. Since temperature is an important cross-linking parameter, films were treated at 90 °C and 105 °C and film properties were compared to those of non-cured films. It was observed that temperature favored the aforementioned reactions, which induced physical and morphological changes. In this regard, darker films with a rougher surface were obtained for the films with a higher cross-linking degree. While mechanical properties were slightly modified, the barrier properties were enhanced due to the reactions that occurred. Therefore, these agar/fish gelatin films cross-linked through two different reactions can be considered to be promising materials as active films for different purposes, such as active packaging or pharmaceutical applications.
这项工作的目的是评估鱼明胶 - 柠檬酸亲核取代反应和琼脂 - 柠檬酸酯化反应对琼脂/鱼明胶薄膜性能的影响。由于温度是一个重要的交联参数，薄膜在90°C和105°C下进行处理，并将薄膜性能与未固化薄膜的性能进行比较。观察到温度有利于上述反应，这些反应引起了物理和形态变化。在这方面，交联度较高的薄膜获得了表面更粗糙的深色薄膜。虽然机械性能略有改变，但由于发生的反应，阻隔性能得到了增强。因此，这些通过两种不同反应交联的琼脂/鱼明胶薄膜可被认为是用于不同目的的活性薄膜的有前途的材料，如活性包装或药物应用。
