Sari Kurnia, Affandi Fahrizal Yusuf, Nugraha Bayu, Anwar Muslih, Pamungkas Amin, Praharasti Anggita Sari, Janah Indah Miftakhul, Hernawan Hernawan, Bahmid Nur Alim
Bioresource Technology and Veterinary Department, Vocational College, Universitas Gadjah Mada, Indonesia; Research Assistant Program, National Research and Innovation Agency (BRIN), Yogyakarta 55961, Indonesia.
Bioresource Technology and Veterinary Department, Vocational College, Universitas Gadjah Mada, Indonesia.
Int J Biol Macromol. 2025 Sep;322(Pt 3):146948. doi: 10.1016/j.ijbiomac.2025.146948. Epub 2025 Aug 18.
This study aimed to characterize a novel film material based on citric acid-crosslinked chitosan blended with hydroxypropyl methylcellulose (HPMC) in various ratios, and to investigate the physiological effects of coating on the quality of Cavendish bananas. The physical, chemical, and mechanical properties of the various ratios of blended films were evaluated. The appropriate formulation was applied for coating Cavendish banana, and its physiological impacts on respiration rate, weight loss, textural changes, color variations, and total soluble solids were monitored over a 14-day period. FTIR analysis confirmed the successful cross-linking of chitosan with citric acid, forming a CO group on the amine group, and its blend with HPMC formed intermolecular hydrogen bonds. The higher ratio of cross-linked chitosan over 50 % increased WCA and reduced WVTR by 40 %, exhibiting better barrier properties and wettability for coating. The film with a higher content of cross-linked chitosan (75 % and 100 %) had better moisture retention, flexibility, and transparency properties. The coating effectively slowed respiration rate by decreasing oxygen intake, increasing CO production, and delaying ethylene production to reach its peak before the senescence phase. The results eventually induced a reduction in weight loss and a delay in the softening process and TSS changes. In terms of the hue angle, the color changes of the coated banana were also 0.50° slower for each day than those of the uncoated banana. The shelf life of the banana was quantitatively estimated, and the coating could enhance the post-harvest life of the bananas for approximately four days.
本研究旨在表征一种基于柠檬酸交联壳聚糖与不同比例羟丙基甲基纤维素（HPMC）共混的新型薄膜材料，并研究涂层对卡文迪什香蕉品质的生理影响。对不同比例共混薄膜的物理、化学和机械性能进行了评估。将合适的配方应用于卡文迪什香蕉涂层，并在14天内监测其对呼吸速率、失重、质地变化、颜色变化和总可溶性固形物的生理影响。傅里叶变换红外光谱（FTIR）分析证实壳聚糖与柠檬酸成功交联，在胺基上形成了羰基，并且其与HPMC的共混物形成了分子间氢键。交联壳聚糖比例超过50%时，接触角增大，水蒸气透过率降低40%，表现出更好的阻隔性能和涂层润湿性。交联壳聚糖含量较高（75%和100%）的薄膜具有更好的保湿性、柔韧性和透明性。涂层通过减少氧气摄入、增加二氧化碳产生以及延迟乙烯产生至衰老期前达到峰值，有效地减缓了呼吸速率。结果最终导致失重减少以及软化过程和总可溶性固形物变化延迟。就色相角而言，涂覆香蕉的颜色变化每天也比未涂覆香蕉慢0.50°。对香蕉的货架期进行了定量估计，涂层可将香蕉的采后寿命延长约四天。
