Zhao Yucong, Ma Xueli, Wang Guohua, Gao Le, Zhang Mengyao, Ding Yong, Lv Shenghua
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, China.
School of Food Science and Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, China.
Int J Biol Macromol. 2024 Sep 14;280(Pt 1):135649. doi: 10.1016/j.ijbiomac.2024.135649.
The objective of this study was to prepare an active packaging film using phosphorylated soy protein isolate (PPS) and Artemisia sphaerocephala Krasch. gum (ASKG) as film matrices, with the incorporation of pomegranate peel extract (PPE) to preserve fresh-cut apples. The results showed that PA-PPE (PPS/ASKG-PPE) films significantly increased thickness by 24.47 %, tensile strength by 58.76 %, and elongation at break by 30.48 %. Additionally, water vapor permeability and oxygen permeability decreased significantly to 6.17 × 10 and 0.62 × 10 Kg•m•m•s•Pa, respectively. FTIR, XRD, and SEM analyses confirmed the formation of intermolecular hydrogen bonds between PPS, ASKG, and polyphenols extracted from pomegranate peel, indicating excellent compatibility. Furthermore, radical scavenging activity experiments demonstrated that these films exhibited a remarkable ability to scavenge DPPH and ABTS radicals up to 70.44 % and 74.28 %, respectively, when the PPE content was at 3 wt%. Moreover, PPS could achieve a sustained release effect on polyphenols with a relatively low release rate (63.83 %) even after seven days' time elapsed. Finally, the PA-PPE film displayed superior performance in reducing the weight loss and browning index of fresh-cut apples within 24 h of storage. The development of PA-PPE film could promote sustainable resource protection and demonstrate promising prospects in the field of fresh-cut fruit packaging.
本研究的目的是制备一种活性包装薄膜，该薄膜以磷酸化大豆分离蛋白（PPS）和沙蒿胶（ASKG）作为成膜基质，并加入石榴皮提取物（PPE）以保鲜鲜切苹果。结果表明，PA-PPE（PPS/ASKG-PPE）薄膜的厚度显著增加了24.47%，拉伸强度提高了58.76%，断裂伸长率提高了30.48%。此外，水蒸气透过率和氧气透过率分别显著降低至6.17×10和0.62×10 Kg•m•m•s•Pa。傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）和扫描电子显微镜（SEM）分析证实，PPS、ASKG与石榴皮中提取的多酚之间形成了分子间氢键，表明具有良好的相容性。此外，自由基清除活性实验表明，当PPE含量为3 wt%时，这些薄膜对DPPH和ABTS自由基的清除能力分别高达70.44%和74.28%。此外，即使经过7天，PPS对多酚仍能实现相对较低释放率（63.83%）的缓释效果。最后，PA-PPE薄膜在储存24小时内，在减轻鲜切苹果的失重和降低褐变指数方面表现出优异的性能。PA-PPE薄膜的开发可以促进资源的可持续保护，并在鲜切水果包装领域展现出广阔的前景。
