Efecto de la mancha del almidón de yuca y glicerina sobre las características fisicoquímicas y mecánicas de una película biopolimérica

The objective of this study was to evaluate the effect of cassava starch mancha and glycerin on the physicochemical and mechanical properties of a biopolymeric film to determine how each component and their interaction influence the material's final properties. A Completely Randomized Design (CRD) with a factorial A×B arrangement was used, comprising 16 treatments and 3 repetitions. The treatments combined different percentages of starch mancha (Factor A: 8%, 10%, 12%, 14%) and glycerin (Factor B: 2.5%, 5%, 7.5%, 10%). The solubility in HCl, water, and NaOH, as well as Young's modulus, tensile strength, and elongation at break, were analyzed. The methodologies employed included the casting method and ASTM D882 standard. Eight treatments exhibited deformations, which prevented their analysis. The results showed that T5 presented the lowest solubility in all solvents evaluated. Regarding mechanical properties, T14 exhibited the highest Young's modulus and tensile strength, whereas T1 achieved the highest elongation at break and the lowest tensile strength. It was concluded that the starch mancha increased solubility in NaOH, water, and HCl while improving tensile strength and Young's modulus but reducing elongation at break. In contrast, glycerin did not significantly affect solubility in NaOH or water but reduced solubility in HCl. Additionally, it decreased elongation at break and increased tens without influencing Young´s modulus.

• Autor principal: Arteaga Vivas, Kevin Alexander (author)
• Altres autors: Chica Santos, Miguel Ángel (author)
• Format: bachelorThesis
• Idioma: spa
• Publicat: 2025
• Matèries: Mancha de almidón; Residuo; Glicerina; Biopolímeros
• Accés en línia: http://repositorio.espam.edu.ec/handle/42000/2773