Browsing by Author "Tocalema Tisalema, Nelly Marisol"

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    Obtención y caracterización físico-mecánica de un biopolímero a partir del almidón de la oca (Oxalis Tuberosa)
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2024-08) Tocalema Tisalema, Nelly Marisol; Paredes Salinas, Juan Gilberto
    Currently, traditional polymers have a wide range of applications, especially in the packaging industry, where a considerable number of tons are used per year. However, they have drawbacks that must be taken into account. Commercial plastics are manufactured using raw materials from non-renewable resources, such as oil, whose availability is decreasing and its price constantly increasing. Furthermore, they persist in the environment for extended periods of time, causing major environmental problems. This work was developed in three essential stages to obtain optimal results. The first stage consisted of the extraction of goose starch, using a juice extractor, followed by obtaining the biopolymer through a design of experiments (DOE) by mixing, at room temperature and a curing time of 8 days. The second stage included the characterization of the biopolymer, carried out according to the ASTM D638 (Tensile) standard, using a universal testing machine, and the evaluation of biodegradability in accordance with the INTE ISO 14855-1 standard, through ground and air tests. In the third stage, the results obtained were tabulated and analyzed using statistical software. This allowed us to statistically test the assumptions and verify the significance of the model (ANOVA) to identify the best compound. The results showed a maximum tensile stress of 4.10 MPa, an elastic modulus of 23.86 MPa, an elongation of 5.3 percent, in biodegradability tests, a weight loss of 53.36 percent in air and 58.77 percent in the earth.