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Título : Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas
Autor : Morantes Luis, Dana Zuliet
Director de Trabajo de Grado: Muñoz Prieto, Efren de Jesús (Director de Tesis)
Palabras clave: Celulosa
Nanocristales de celulosa
Celulosa - Química
Análisis termogravimétrica
Analisis térmico
Termogravimetría
Floculación
Purificación de aguas residuales - Floculación
Maestría en Química - Tesis y disertaciones académicas
Fecha de publicación : 2017
Editorial : Universidad Pedagógica y Tecnológica de Colombia
Citación : Morantes Luis, D. L. (2017). Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas. (Tesis de maestría). Universidad Pedagógica y Tecnológica de Colombia, Tunja. http://repositorio.uptc.edu.co/handle/001/2498
Resumen : La celulosa es el biopolímero más abundante de la tierra. Los diferentes materiales celulósicos han sustituido a los polímeros derivados del petróleo, ofreciendo una alternativa natural y sostenible. Entre ellos, los nanocristales de celulosa (CNC), cuya superficie a través de la modificación química permite explorar un amplio espectro de aplicaciones como el tratamiento de aguas. En este trabajo, se modificó CNC con el reactivo de Girard’s T (cloruro de 2-hidrazinil-2-oxoetiltrimetilamonio) y CHPTAC (cloruro de 3-cloro-2-hidroxipropiltrimetilamonio) como injertos catiónicos. Los materiales sintetizados se caracterizaron química y estructuralmente por potencial Z, grado de sustitución por análisis elemental, espectroscopia infrarroja con transformada de Fourier (FTIR), difracción de rayos X (XRD), tamaño hidrodinámico por dispersión dinámica de luz (DLS) y Microscopia de fuerza atómica (AFM). Adicionalmente se realizó el estudio de las propiedades térmicas por termogravimetría (TGA) y calorimetría diferencial de barrido (DSC). Se evaluó la capacidad floculante de CNC-EPTMAC sobre suspensiones de silica (SiO2) a 0,25 % p/p y se determinó la dosis óptima. Este trabajo prueba la capacidad de floculación de CNC-EPTMAC en agua en términos de eliminación de turbidez y disminución de parámetros fisicoquímicos en aguas superficiales.
Descripción : 1 recurso en línea (64 páginas ) : ilustraciones color, figuras, gráficos, tablas.
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Aparece en las colecciones: AHG. Trabajos de Grado y Tesis

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