Centro de Desarrollo de Productos Bióticos, Instituto Politécnico Nacional, Km 6 carr Yautepec-Jojutla, Calle Ceprobi No. 8, Colonia San Isidro, Apartado Postal 24, C.P 62731, Yautepec, Morelos, Mexico.
Mater Sci Eng C Mater Biol Appl. 2013 Oct;33(7):3903-8. doi: 10.1016/j.msec.2013.05.027. Epub 2013 May 18.
Rice and banana flours are inexpensive starchy materials that can form films with more improved properties than those made with their starch because flour and starch present different hydrophobicity. Montmorillonite (MMT) can be used to further improve the properties of starch-based films, which has not received much research attention for starchy flours. The aim of this work was to evaluate the mechanical and barrier properties of nanocomposite films of banana and rice flours as matrix material with addition of MMT as a nanofiller. MMT was modified using citric acid to produce intercalated structures, as verified by the X-ray diffraction pattern. The intercalated MMT was blended with flour slurries, and films were prepared by casting. Nanocomposite films of banana and rice flours presented an increase in the tensile at break and elongation percentage, respectively, more than their respective control films without MMT. This study showed that banana and rice flours could be alternative raw materials to use in making nanocomposite films.
大米和香蕉粉是廉价的淀粉材料，它们可以形成具有比其淀粉更好的性能的薄膜，因为面粉和淀粉具有不同的疏水性。蒙脱土 (MMT) 可用于进一步改善基于淀粉的薄膜的性能，而对于淀粉粉，这方面的研究关注较少。本工作的目的是评估以香蕉和大米粉为基质材料的纳米复合材料薄膜的机械和阻隔性能，并添加 MMT 作为纳米填料。用柠檬酸对 MMT 进行了改性，通过 X 射线衍射图证实了插层结构的形成。插层 MMT 与面粉糊混合，然后浇铸制备薄膜。与不含 MMT 的各自对照薄膜相比，香蕉和大米粉的纳米复合薄膜的拉伸断裂和伸长率分别增加。本研究表明，香蕉和大米粉可以替代原料用于制造纳米复合薄膜。
