Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas
1 recurso en línea (64 páginas ) : ilustraciones color, figuras, gráficos, tablas.
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| Other Authors: | |
| Format: | Trabajo de grado - Maestría |
| Language: | spa |
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Universidad Pedagógica y Tecnológica de Colombia
2019
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| Online Access: | http://repositorio.uptc.edu.co/handle/001/2498 |
| _version_ | 1801705881673400321 |
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| author | Morantes Luis, Dana Zuliet |
| author2 | Muñoz Prieto, Efren de Jesús |
| author_facet | Muñoz Prieto, Efren de Jesús Morantes Luis, Dana Zuliet |
| author_sort | Morantes Luis, Dana Zuliet |
| collection | DSpace |
| description | 1 recurso en línea (64 páginas ) : ilustraciones color, figuras, gráficos, tablas. |
| format | Trabajo de grado - Maestría |
| id | repositorio.uptc.edu.co-001-2498 |
| institution | Repositorio Institucional UPTC |
| language | spa |
| publishDate | 2019 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia |
| record_format | dspace |
| spelling | repositorio.uptc.edu.co-001-24982023-03-29T20:23:34Z Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas Morantes Luis, Dana Zuliet Muñoz Prieto, Efren de Jesús Celulosa Nanocristales de celulosa Celulosa - Química Análisis termogravimétrica Analisis térmico Termogravimetría Floculación Purificación de aguas residuales - Floculación Maestría en Química - Tesis y disertaciones académicas 1 recurso en línea (64 páginas ) : ilustraciones color, figuras, gráficos, tablas. Cellulose 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 The different cellulosic materials have been replaced by polymers derived from petroleum, offering a natural and sustainable alternative.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. 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. Bibliografía y webgrafía: páginas 61-64. Maestría Magíster en Química 2019-03-28T14:16:01Z 2019-03-28T14:16:01Z 2017 Trabajo de grado - Maestría http://purl.org/coar/resource_type/c_bdcc info:eu-repo/semantics/masterThesis info:eu-repo/semantics/publishedVersion Text https://purl.org/redcol/resource_type/TM http://purl.org/coar/version/c_970fb48d4fbd8a85 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 http://repositorio.uptc.edu.co/handle/001/2498 spa T. 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Copyright (c) 2017 Universidad Pedagógica y Tecnológica de Colombia https://creativecommons.org/licenses/by-nc/4.0/ info:eu-repo/semantics/openAccess Atribución-NoComercial 4.0 Internacional (CC BY-NC 4.0) http://purl.org/coar/access_right/c_abf2 application/pdf application/pdf application/pdf Universidad Pedagógica y Tecnológica de Colombia Facultad de Ciencias. Escuela de Posgrados. Maestría en Química |
| spellingShingle | Celulosa Nanocristales de celulosa Celulosa - Química Análisis termogravimétrica Analisis térmico Termogravimetría Floculación Purificación de aguas residuales - Floculación Maestría en Química - Tesis y disertaciones académicas Morantes Luis, Dana Zuliet Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas |
| title | Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas |
| title_full | Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas |
| title_fullStr | Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas |
| title_full_unstemmed | Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas |
| title_short | Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas |
| title_sort | modificaciones cationicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas |
| topic | Celulosa Nanocristales de celulosa Celulosa - Química Análisis termogravimétrica Analisis térmico Termogravimetría Floculación Purificación de aguas residuales - Floculación Maestría en Química - Tesis y disertaciones académicas |
| url | http://repositorio.uptc.edu.co/handle/001/2498 |
| work_keys_str_mv | AT morantesluisdanazuliet modificacionescationicasdenanocristalesdecelulosaaplicadascomofloculantesaltratamientodeaguas |
