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; Universidad de la Guajira, Kilómetro 5, Riohacha, La Guajira, Colombia.
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.
Int J Biol Macromol. 2024 Jul;273(Pt 2):132951. doi: 10.1016/j.ijbiomac.2024.132951. Epub 2024 Jun 5.
The current work focuses on developing nanocomposite films using taro starch and cellulose nanofibers extracted from the root's peel. Films were prepared using mixtures of starch, cellulose nanofibers (0 %, 5 %, 10 %, and 15 % w/w), glycerol, and water. Results showed that the addition of cellulose nanofibers increased film thickness, opacity, UV-light barrier capacity, and water swelling percentage. All films showed a typical B-type X-ray diffraction pattern characteristic of semicrystalline materials. FTIR analysis confirmed chemical interactions between the starch chains and the nanofibers, which probably interact through hydrogen bonds. Nanocomposite films exhibited increased tensile strength and reduced strain at break compared to control materials. Films with cellulose nanofibers showed an increase in Young's modulus compared to control ones, with no differences observed between films with cellulose nanofibers at 10 % and 15 %. Furthermore, films with cellulose nanofibers at 5 % and 10 % exhibited lower water vapor permeability than control samples, while those with cellulose nanofibers at 15 % showed an increase in this parameter compared to other materials. These results suggest that incorporating taro cellulose nanofibers is a promising alternative for obtaining taro starch nanocomposites films with improved properties.
本研究旨在开发以芋艿淀粉和从根部提取的纤维素纳米纤维为原料的纳米复合薄膜。通过将淀粉、纤维素纳米纤维（0%、5%、10%和 15%w/w）、甘油和水混合制备薄膜。结果表明，添加纤维素纳米纤维会增加薄膜的厚度、不透明度、紫外线阻隔能力和水膨胀率。所有薄膜均表现出典型的 B 型 X 射线衍射图案，这是半结晶材料的特征。FTIR 分析证实了淀粉链和纳米纤维之间的化学相互作用，这可能是通过氢键相互作用实现的。与对照材料相比，纳米复合薄膜的拉伸强度增加，断裂伸长率降低。与对照薄膜相比，添加纤维素纳米纤维的薄膜杨氏模量增加，而添加 10%和 15%纤维素纳米纤维的薄膜之间没有差异。此外，添加 5%和 10%纤维素纳米纤维的薄膜的水蒸气透过率低于对照样品，而添加 15%纤维素纳米纤维的薄膜的水蒸气透过率则高于其他材料。这些结果表明，将芋艿纤维素纳米纤维掺入其中是获得具有改善性能的芋艿淀粉纳米复合薄膜的一种有前途的方法。
