Ciencias Exactas y Ciencias de la Salud
Permanent URI for this collectionhttps://hdl.handle.net/11285/551039
Pertenecen a esta colección Tesis y Trabajos de grado de las Maestrías correspondientes a las Escuelas de Ingeniería y Ciencias así como a Medicina y Ciencias de la Salud.
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- Análisis de un absorbedor de energía mecánico fabricado en ácido poliláctico mediante manufactura aditiva(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2025-05-21) Orduz Pérez, Roberto Carlos; Jiménez Martínez, Moises; emimmayorquin; Murgas Portilla, Brayan David; Campus Toluca; Varela Soriano, JulioDevices designed for energy absorption reduce the impact on various systems by converting kinetic energy into strain energy. This study explores the use of polylactic acid in conjunction with additive manufacturing processes to create such devices, with a focus on improving their performance through thermal processing. Key performance indicators for these devices include thermal gradients, relative density, and folding failures. It was found that applying an annealing heat treatment improved specific energy absorption (SEA) by 33 %. Further improvements to this type of device can be achieved by combining post-printing heat treatment with relative density to eliminate thermal gradients. With the right design, this solution can be adapted for use in a variety of applications.
- Development of bio-based polymer composites using agro-industrial residues(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2022) Gámiz Conde, Alexa Karolina; Treviño Quintanilla, Cecilia Daniela; mtyahinojosa, emipsanchez; Franco Urquiza, Edgar A.; Martínez Franco, Enrique; Bravo Alfaro, Diego Alberto; School of Engineering and Sciences; Campus Querétaro; Burelo Torres, José ManuelThe urgent need to address global warming, deriving from the alarming scale of petroleum-derived plastics pollution and the impact caused by the disposal of numerous agro- industrial residues because of high demand, emphasizes the importance of immediate action. To mitigate this problem, this research is developing a bio-based polymer composite by evaluating it as an alternative for further food packaging as a promising avenue in material studies, specifically in science and as a reaction to the effects of pollution. This preparation, synthesis, and characterization of bio-based polymeric composites comprising Polylactic Acid (PLA) and fillers of by-products of coffee and avocado. PLA, a biodegradable and renewable polymer, is an ideal matrix for these composites, aligning with the global demand for responsible materials. The research encompasses the systematic incorporation (without any coupling agent or plasticizer) of agro-industrial residues into the PLA matrix. Fillers were loaded in PLA from 0.5 to 10 wt.%. The bio-composites were prepared using solvent-cast films and were subjected to a tensile test, FT-IR spectral, TGA, DSC, DLS, XRD, and SEM analysis. The composites’ formation was verified by the use of SEM analysis and FT-IR spectroscopy. The resulting composites' analysis reveals enhanced thermal properties compared to virgin PLA; material mostly used in industry. These composites hold promise for applications across the food industry, like disposable and single-use materials and food storage. This bio-based composite can contribute to the global need for eco-friendly materials.
- Refuerzo de una matriz polimérica con nanotubos de carbono: desarrollo y caracterización(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2020-12-03) Ortiz Maldonado, Elizabeth; Vieyra Ruíz, Horacio; puelquio/mscuervo; Álvarez Zapato, Luis; Balbuena Campuzano, Carlos; Escuela de Ingeniería y Ciencias; Campus Toluca; Pachecho Pacheco, MarquidiaEl desarrollo de nuevos materiales biodegradables está expuesto a diversas investigaciones, debido a que se puede crear un material compuesto donde se puede aprovechar las propiedades de cada uno de los elementos que lo conforman y poder desarrollar un material amigable con el medio ambiente. Este desarrollo va de la mano con las necesidades de la industria, ya que se crea un material compuesto que cumpla con los requerimientos para aplicaciones de sistemas electrónicos, automotriz e incluso biológicos, con el fin de sustituir materiales convencionales. En este documento se presenta, el desarrollo de un material compuesto de ácido poliláctico (PLA) y nanotubos de carbono (ntc) como material reforzante. Una vez sintetizados los nanotubos de carbono por medio del método de descarga de arco eléctrico, se estudió su morfología. Se prepararon películas de PLA-ntc bajo concentraciones de 2.5%, 3.5% y 5% p/p (porcentaje peso a peso) de nanotubos de carbono por medio del método de casting (o vaciado), además la mezcla fue sometida a baño ultrasónico con la finalidad de promover la dispersión del material reforzante en la matriz polimérica de PLA. Las películas de PLA-ntc fueron sometidas a ensayos mecánicos, con el fin de evaluar sus propiedades mecánicas. Los resultados obtenidos demostraron un incremento en las propiedades mecánicas en la concentración del 5% p/p respecto al PLA puro.
- Manufacturability of PLA parts reinforced with TiO2 nanoparticles by ultrasonic molding.(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2020-06-16) Macías Naranjo, Mariana; VAZQUEZ LEPE, ELISA VIRGINIA; 268852; Vázquez Lepe, Elisa Virginia; mla, emipsanchez; Ortega Lara, Wendy de Lourdes; Rodríguez González, Ciro Angel; School of Engineering and Sciences; Campus Monterrey; Ferrer Real, InésThe objective of the thesis is to define and to validate a methodology for the stabilization of process parameters in ultrasonic molding and to analyze the manufacturability of PLA parts reinforced with TiO2 nanoparticles in the ultrasonic molding process. Ultrasonic molding is a new technology used for micro-part molding, reducing the necessary energy, process times, and material waste. Validating a methodology for this process, PLA was processed with TiO2 nanoparticles to observe the response of the process in this combination of materials. In addition, to observe the influence of the concentration of nanoparticles by performing the characterization to find an application in the medical sector in the future.
- Design of a Bioabsorbable stent as preventive treatment of complication in bariatric surgery RYGBP(2017-12-05) Jara Mendiola, Juan Manuel; Vázquez Lepe, Elisa Virginia; García López, Erika; Rodríguez González, Ciro ÁngelA new approach to the treatment of complications of RYGBP is covered by the implementation of design methodologies as quality function deployment and theory of inventive problem solving, (QFD and TRIZ) to propose a Design of a bioabsrobable stent as a preventive treatment. In despite on the variability of documented results of degradation rates of bio polymers and bio metals, a new lab protocol is proposed to homogenize both families of materials degradation rates into comparable results. The usage of PLA and AZ31 into a new protocol proposal of degradation tests were carried on. The design resultant by the design methodologies were tested by finite element analysis to compare compression resistance, flexibility and compressibility. Three design proposals are shown with acceptable performance and an expected functional life time.