Ashrafi Azam, Babapour Hamid, Johari Simindokht, Alimohammadi Faezeh, Teymori Farangis, Nafchi Abdorreza Mohammadi, Shahrai Nurul Nuraliya, Huda Nurul, Abedinia Ahmadreza
Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran 14778-93855, Iran.
Food Biopolymer Research Group, Food Science and Technology Department, Damghan Branch, Islamic Azad University, Damghan 36716-39998, Iran.
Foods. 2023 Feb 3;12(3):670. doi: 10.3390/foods12030670.
This study aimed to describe the properties of cold water fish gelatin (FG) blended with poultry gelatin (PG) for a production of a sachet containing olive oil. To find a desirable film, the different ratio of FG-PG-based films were characterized in terms of mechanical properties. As the proportion of PG in PG-FG-based increased, the tensile strength and Young's modulus were increased, and the elongation at break and heat seal strength of the films were decreased. The 50-50 film had favorable characteristics to use as a sachet. The amount of acid index and peroxide of the oil stored in the sachets after 14 days showed that there is a significant difference ( < 0.05) between the films. The barrier properties of the films including the water vapor permeability and oxygen permeability of films were increased from 1.21 to 4.95 × 10 g m Pa s and 48 to 97 cm mµ/m d kPa, respectively. Dark, red, yellow, and opaque films were realized with increasing PG. Fourier transform infrared (FTIR) spectra approved a wide peak of approximately 2500 cm. The rheological analysis indicated that, by adding PG, viscosity, elastic modulus (G') and loss modulus (G'') were increased significantly ( < 0.05) about 9.5, 9.32 and 18 times, respectively. Therefore, an easy modification of FG with PG will make it suitable for oil sachet packaging applications for the food industry.
本研究旨在描述冷水鱼明胶（FG）与家禽明胶（PG）混合用于生产含橄榄油小袋包装的特性。为找到理想的薄膜，对不同比例的FG - PG基薄膜的机械性能进行了表征。随着PG - FG基中PG比例的增加，薄膜的拉伸强度和杨氏模量增加，而断裂伸长率和热封强度降低。50 - 50比例的薄膜具有用作小袋包装的良好特性。14天后储存在小袋中的油的酸值和过氧化物含量表明，不同薄膜之间存在显著差异（<0.05）。薄膜的阻隔性能，包括水蒸气透过率和氧气透过率，分别从1.21增加到4.95×10 g m Pa s和从48增加到97 cm mµ/m d kPa。随着PG含量增加，薄膜呈现出深色、红色、黄色且不透明。傅里叶变换红外（FTIR）光谱显示在约2500 cm处有一个宽峰。流变学分析表明，添加PG后，粘度、弹性模量（G'）和损耗模量（G''）分别显著增加（<0.05）约9.5倍、9.32倍和18倍。因此，用PG对FG进行简单改性将使其适用于食品工业的油小袋包装应用。
