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Obtainment and characterization of nanocomposites thermoplastic starch/nanofibers and nanocrystals from tequila agave bagasse
This project focused on the development of thermoplastic starch (TPS) nanocomposites containing cellulose nanofibers (CNFs) or nanocrystals (CNCs) as reinforcements. The first step was to prepare the CNFs and CNCs. In both cases, bleached and unbleached cellulosic pulp, from bagasse of agave tequila, were used as starting materials. The preparation of the nanocomposites consisted in developing a starting mixture of TPS, deionized water and glycerin. This solution was warmed until it reached gelatinization. After that, aqueous suspensions of CNFs or CNCs were added to the system and the solution was agitated until complete homogenization. This final mixture was then subjected to an ultrasonic treatment and kept at constant temperature for approximately 24 hours until solidification. A total of 6 films with different compositions were employed as samples for characterization, as well as a blank that only had TPS without any reinforcement. CNF and CNC compositions were 2% and 6 wt%. The characterization consisted in performing mechanical tests, XRD studies, SEM and FTIR.