Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas

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dc.contributor.advisorMuñoz Prieto, Efren de Jesússpa
dc.contributor.authorMorantes Luis, Dana Zuliet
dc.date.accessioned2019-03-28T14:16:01Z
dc.date.available2019-03-28T14:16:01Z
dc.date.issued2017
dc.description1 recurso en línea (64 páginas ) : ilustraciones color, figuras, gráficos, tablas.spa
dc.description.abstractCellulose is the most abundant biopolymer on earth. The different cellulosic materials have been replaced by polymers derived from petroleum, offering a natural and sustainable alternative. Among them, the cellulose nanocrystals (CNC), which allow to explore a wide spectrum of applications such as water treatment. In this work, CNC was modified with the reagent of Girard's T (2-hydrazinyl-2-oxoethyltrimethylammonium chloride) and CHPTAC (3-chloro-2-hydroxypropyltrimethylammonium chloride) as cationic grafts. The synthesized materials were characterized chemically and structurally with Z potential, degree of substitution with elemental analysis, infrared spectroscopy with Fourier transform (FTIR), X-ray diffraction (XRD), hydrodynamic size with dynamic light scattering (DLS) and microscopy of atomic force (AFM). Additionally, thermal properties were studied with thermogravimetry (TGA) and differential scanning calorimetry (DSC). The flocculant capacity of CNC-EPTMAC on suspensions of silica (SiO2) at 0.25% w / w was evaluated and the optimum dose was determined. This work tests the flocculation capacity of CNC-EPTMAC in water in terms of elimination of turbidity and decrease of physicochemical parameters in surface water.eng
dc.description.abstractLa 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.spa
dc.description.degreelevelMaestríaspa
dc.description.degreenameMagíster en Químicaspa
dc.description.notesBibliografía y webgrafía: páginas 61-64.spa
dc.format.mimetypeapplication/pdfspa
dc.identifier.citationMorantes 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/001/2498spa
dc.identifier.urihttp://repositorio.uptc.edu.co/handle/001/2498
dc.language.isospaspa
dc.publisherUniversidad Pedagógica y Tecnológica de Colombiaspa
dc.publisher.facultyFacultad de Ciencias. Escuela de Posgrados. Maestría en Químicaspa
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dc.rightsCopyright (c) 2017 Universidad Pedagógica y Tecnológica de Colombiaspa
dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.coarhttp://purl.org/coar/access_right/c_abf2spa
dc.rights.creativecommonsAtribución-NoComercial 4.0 Internacional (CC BY-NC 4.0)spa
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/spa
dc.subject.armarcCelulosa
dc.subject.armarcNanocristales de celulosa
dc.subject.armarcCelulosa - Química
dc.subject.armarcAnálisis termogravimétrica
dc.subject.armarcAnalisis térmico
dc.subject.armarcTermogravimetría
dc.subject.armarcFloculación
dc.subject.armarcPurificación de aguas residuales - Floculación
dc.subject.armarcMaestría en Química - Tesis y disertaciones académicas
dc.titleModificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguasspa
dc.typeTrabajo de grado - Maestríaspa
dc.type.coarhttp://purl.org/coar/resource_type/c_bdccspa
dc.type.coarversionhttp://purl.org/coar/version/c_970fb48d4fbd8a85spa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/masterThesisspa
dc.type.redcolhttps://purl.org/redcol/resource_type/TMspa
dc.type.versioninfo:eu-repo/semantics/publishedVersionspa
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