Daza-Orsini Sandra Milena, Medina-Jaramillo Carolina, López-Córdoba Alex
Grupo de Investigación en Bioeconomía y Sostenibilidad Agroalimentaria, Escuela de Administración de Empresas Agropecuarias, Facultad Seccional Duitama, Universidad Pedagógica y Tecnológica de Colombia, Carrera 18 con Calle 22, Duitama 150461, Colombia.
Facultad de Ingeniería, Programa de Ingeniería Industrial, Universidad de la Guajira, Kilómetro 5, Riohacha 440002, Colombia.
Polymers (Basel). 2025 Aug 29;17(17):2354. doi: 10.3390/polym17172354.
This study explores the valorization of roots (flesh and peels) as a source of biopolymers by isolating and characterizing starch and cellulose nanofibers. Fresh roots were sourced from the Colombian Caribbean, and a bromatological analysis was conducted to determine their composition. Starch was extracted from the flesh (yield: 16.2 ± 0.5%) and characterized by a low amylose content (14.6 ± 0.9%) and a gelatinization temperature of 77.6 ± 0.3 °C. Granules showed spherical and polyhedral shapes and smooth, fissure-free surfaces. The median granule size (D50 = 12.2 ± 0.18 µm) exceeded several values reported for from other regions. Cellulose nanofibers were isolated from peel byproducts (yield: 10.0 ± 1.4%), displaying dense fibrillar networks with diameters of 15-25 nm and lengths around 80 nm. FTIR analysis confirmed the presence of characteristic functional groups in both materials. Thermogravimetric analysis showed thermal degradation peaks at 320 °C for starch and 330 °C for nanocellulose. These findings demonstrate that , an underutilized crop in the Colombian Caribbean, represents a promising and sustainable raw material for the development of bio-based polymers with suitable physicochemical, structural, and thermal properties.
本研究通过分离和表征淀粉及纤维素纳米纤维，探索将根（果肉和果皮）作为生物聚合物来源的价值。新鲜的根取自哥伦比亚加勒比地区，并进行了食品分析以确定其成分。从果肉中提取淀粉（产率：16.2±0.5%），其特征为直链淀粉含量低（14.6±0.9%），糊化温度为77.6±0.3℃。颗粒呈球形和多面体形状，表面光滑、无裂缝。中位颗粒尺寸（D50 = 12.2±0.18µm）超过了其他地区报道的几个值。从果皮副产品中分离出纤维素纳米纤维（产率：10.0±1.4%），呈现出直径为15 - 25nm、长度约80nm的致密纤维网络。傅里叶变换红外光谱（FTIR）分析证实了两种材料中存在特征官能团。热重分析表明淀粉在320℃出现热降解峰，纳米纤维素在330℃出现热降解峰。这些发现表明，在哥伦比亚加勒比地区未得到充分利用的一种作物，是开发具有合适物理化学、结构和热性能的生物基聚合物的一种有前景且可持续的原材料。
