Department of Food Engineering and Technology, Tezpur University, Assam 784028, India.
Department of Food Engineering and Technology, Tezpur University, Assam 784028, India.
Int J Biol Macromol. 2024 Jan;254(Pt 2):127791. doi: 10.1016/j.ijbiomac.2023.127791. Epub 2023 Nov 1.
The current study focuses on the preparation and characterization of potato starch-based biocomposite films by reinforcing them with banana fiber. The banana fibers were modified using ultrasonication and cellulase enzyme, individually and in combination. Both native and modified banana fibers underwent physical, morphological, FTIR, and crystallinity analyses. The resulting biocomposite films, created by incorporating native and treated banana fibers, were then evaluated for their mechanical, thermal, barrier, and biodegradable properties. The findings indicated that combining ultrasound with enzyme treatment of banana fibers in the potato starch matrix led to a substantial reduction in water-sorption and water-vapor permeability (0.156 g mm m h kPa) of the packaging films. Additionally, the mechanical properties (5.02 MPa-Tensile strength, 4.27 MPa-Sealability) of the films significantly improved with the inclusion of modified banana fibers. FTIR analysis revealed similar spectra for all modified samples, along with enhanced crystallinity. Moreover, the thermal stability of the developed films was enhanced by the incorporation of modified banana fibers. Scanning electron microscopy showed that the modified fibers exhibited smooth surfaces and an even distribution of spaces compared with the native fibers. The biocomposite films demonstrated biodegradation within 42 days. Furthermore, the packaging application was tested with grapes, which showed that the films could maintain storability for up to 8 days. Overall, these results suggest a promising eco-friendly method for producing packaging films with biocompatible, biodegradable, and non-toxic properties.
本研究专注于通过增强马铃薯淀粉基生物复合材料中的香蕉纤维来制备和表征它们。单独和组合使用超声和纤维素酶对香蕉纤维进行了改性。对天然和改性的香蕉纤维进行了物理、形态、FTIR 和结晶度分析。然后，通过加入天然和处理过的香蕉纤维来评估所得的生物复合材料薄膜的机械、热、阻隔和可生物降解性能。研究结果表明，在马铃薯淀粉基质中联合使用超声和酶处理香蕉纤维，可使包装薄膜的水吸附和水蒸气渗透率（0.156 g mm m h kPa）显著降低。此外，通过加入改性香蕉纤维，薄膜的机械性能（5.02 MPa-拉伸强度，4.27 MPa-密封性）显著提高。FTIR 分析表明，所有改性样品的光谱相似，结晶度增强。此外，通过加入改性香蕉纤维，提高了所开发薄膜的热稳定性。扫描电子显微镜显示，与天然纤维相比，改性纤维的表面更光滑，空间分布更均匀。生物复合材料薄膜在 42 天内实现了生物降解。此外，对葡萄进行了包装应用测试，结果表明，这些薄膜可以将储存期延长至 8 天。总的来说，这些结果表明，采用这种环保友好的方法生产具有生物相容性、可生物降解和无毒特性的包装薄膜具有广阔的前景。
