Centro de Investigación en Ciencia y Tecnología de Alimentos, Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km 1, Rancho Universitario, C.P., 43600 Tulancingo, Hidalgo, Mexico.
Carbohydr Polym. 2013 Oct 15;98(1):102-7. doi: 10.1016/j.carbpol.2013.05.022. Epub 2013 May 18.
The aim of this study was to characterize chayotextle starch films reinforced with cellulose (C) and cellulose nanoparticle (CN) (at concentrations of 0.3%, 0.5%, 0.8% and 1.2%), using thermal, mechanical, physicochemical, permeability, and water solubility tests. C was acid-treated to obtain CN. The films were prepared by casting; potato starch and C were used as the control. The solubility of the starch films decreased with the addition of C and CN compared with its respective film without C and CN. No statistical difference (α=0.05) was found in the films added with different concentrations of C and CN. In general, the mechanical properties were improved with the addition of C and CN, and higher values of tensile strength and elastic modulus were determined in the films reinforced with CN. The melting temperature and enthalpy increased with the addition of C and CN, and the values of both thermal parameters were higher in the films with CN than with C; the enthalpy value of the film decreased when the concentration of C or CN increased in the composite. Low concentration of C and CN is better distributed in the matrix film. The addition of C and CN in the starch films improved some mechanical, barrier, and functional properties.
本研究旨在通过热性能、机械性能、物理化学性能、渗透性和水溶性测试，对添加纤维素（C）和纤维素纳米颗粒（CN）（浓度分别为 0.3%、0.5%、0.8%和 1.2%）的 chayotextle 淀粉膜进行表征。对 C 进行酸处理以获得 CN。通过浇铸制备薄膜；马铃薯淀粉和 C 被用作对照。与不含 C 和 CN 的相应薄膜相比，添加 C 和 CN 会降低淀粉薄膜的溶解度。添加不同浓度的 C 和 CN 的薄膜之间没有统计学差异（α=0.05）。一般来说，随着 C 和 CN 的添加，机械性能得到改善，并且在添加 CN 的薄膜中确定了更高的拉伸强度和弹性模量值。添加 C 和 CN 会增加熔融温度和焓，并且在含有 CN 的薄膜中这两个热参数的值都高于含有 C 的薄膜；当复合材料中 C 或 CN 的浓度增加时，薄膜的焓值降低。低浓度的 C 和 CN 更均匀地分布在基质薄膜中。在淀粉薄膜中添加 C 和 CN 可以改善一些机械、阻隔和功能特性。
