Facultad Ciencias

Permanent URI for this community

Now showing 1 - 1 of 1

Modificaciones catiónicas de nanocristales de celulosa aplicadas como floculantes al tratamiento de aguas
(Universidad Pedagógica y Tecnológica de Colombia, 2017) Morantes Luis, Dana Zuliet; Muñoz Prieto, Efren de Jesús
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 The different cellulosic materials have been replaced by polymers derived from petroleum, offering a natural and sustainable alternative.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.