Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria 21511, Egypt.
Department of Chemistry, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia; Department of Chemistry, Faculty of Science, Alexandria University, Alexandria 21511, Egypt.
Food Chem. 2024 Nov 30;459:140441. doi: 10.1016/j.foodchem.2024.140441. Epub 2024 Jul 14.
Zein-based nanofibers (NFs) functionalized with nisin (NS), reinforced with montmorillonite nanoclay (nMMT) were fabricated by uniaxial electrospinning (ES) for the first time to preserve yellow peach. Spinnability/viscosity/conductivity optimizations generated porous (95.09%), bead-free, ultrathin (119 nm) NFs of low hydrophobicity (26.05). Glutaraldehyde (GTA) crosslinking fostered positive outcomes of tensile strength (1.23 MPa), elongation (5.0%), hydrophobicity (99.46), surface area (201.38 m.g), pore size (2.88 nm), thermal stability (T = 342 °C), antioxidant/cytotoxic activities in optimized NFs that released NS sustainably according to Korsmeyer-Peppas model indicating a Fickian diffusion mechanism with R = 0.9587. The novel NFs inhibited growth of Listeria monocytogenes/aerobic mesophilic populations in peach after 4 days of abusive storage, evincing their robustness in food contact applications. Simultaneously, quality parameters (moisture/texture/browning/total soluble solids/pH) and peach physical appearance were maintained for up to 8 days, endorsing the practical value of zein-based NFs as a non-thermal postharvest intervention for prolonging fruits storage life.
基于玉米醇溶蛋白的纳米纤维（NFs）通过单轴静电纺丝（ES）首次被制备出来，并用乳链菌肽（NS）进行功能化，并增强了蒙脱石纳米粘土（nMMT），以用于保存黄桃。可纺性/粘度/导电性的优化生成了多孔（95.09%）、无珠（119nm）、超薄（119nm）的低疏水性（26.05%）NFs。戊二醛（GTA）交联促进了拉伸强度（1.23MPa）、伸长率（5.0%）、疏水性（99.46%）、表面积（201.38m.g）、孔径（2.88nm）、热稳定性（T=342°C）和抗氧化/细胞毒性活性的积极结果，在优化的 NF 中根据 Korsmeyer-Peppas 模型可持续释放 NS，表明其具有 Fickian 扩散机制，R=0.9587。新型 NFs 在滥用储存 4 天后抑制了桃中单核细胞增生李斯特菌/好氧嗜温菌的生长，证明了其在食品接触应用中的稳健性。同时，水分/质地/褐变/总可溶性固体/ pH 值等质量参数和桃的外观可保持长达 8 天，证明了基于玉米醇溶蛋白的 NFs 作为一种非热采后干预措施，可延长水果的贮藏寿命。
