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Antioxidant and antimicrobial films based on brewers spent grain arabinoxylans, nanocellulose and feruloylated compounds for active packaging
Food Hydrocolloids ( IF 10.7 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.foodhyd.2020.105836
Catarina Moreirinha , Carla Vilela , Nuno H.C.S. Silva , Ricardo J.B. Pinto , Adelaide Almeida , M. Angélica M. Rocha , Elisabete Coelho , Manuel A. Coimbra , Armando J.D. Silvestre , Carmen S.R. Freire

Abstract In this study, brewers spent grain (BSG) arabinoxylans-based nanocomposite films were prepared by solvent casting of arabinoxylans (AX) suspensions containing different amounts of nanofibrillated cellulose (NFC, 5, 10, 25, 50 and 75% mass fraction). The obtained nanocomposite films were homogeneous and presented thermal stability up to 230 °C and good mechanical properties (Young's modulus up to 7.5 GPa). Additionally, the films with 50% NFC were loaded with ferulic acid or feruloylated arabinoxylo-oligosaccharides enriched fraction from BSG (75 mg per g of film). This combination enhanced the UV–Vis barrier properties and imparted additional functionalities to the films, namely (i) antioxidant activity up to 90% (DPPH scavenging activity), (ii) antibacterial activity against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria, and (iii) antifungal activity towards the polymorphic fungus Candida albicans. Therefore, these fully biobased nanocomposite films show potential for application as active food packaging systems.

中文翻译:

基于啤酒厂废谷物阿拉伯木聚糖、纳米纤维素和阿魏酰化化合物的抗氧化和抗菌薄膜,用于活性包装

摘要 在本研究中,啤酒糟 (BSG) 阿拉伯木聚糖基纳米复合薄膜是通过溶剂浇铸含有不同量纳米原纤化纤维素(NFC,5、10、25、50 和 75% 质量分数)的阿拉伯木聚糖 (AX) 悬浮液制备的。所获得的纳米复合薄膜是均匀的,并且在高达 230°C 时具有热稳定性和良好的机械性能(杨氏模量高达 7.5 GPa)。此外,具有 50% NFC 的薄膜装载有来自 BSG 的富含阿魏酸或阿魏酰化阿拉伯木寡糖的级分(每克薄膜 75 毫克)。这种组合增强了 UV-Vis 阻隔性能并赋予薄膜额外的功能,即 (i) 高达 90% 的抗氧化活性(DPPH 清除活性),(ii) 对革兰氏阳性 (金黄色葡萄球菌) 和革兰氏阴性 (大肠杆菌) 细菌的抗菌活性,以及​​ (iii) 对多态性真菌白色念珠菌的抗真菌活性。因此,这些全生物基纳米复合薄膜显示出作为活性食品包装系统应用的潜力。
更新日期:2020-11-01
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