Abstracts Book - IMRC 2018

• SA6-P111
CELLULOSE NANOFIBERS TEMPO-OXIDIZED FILMS,
INCORPORATED WITH CuS NP
Luis Alejandro Macclesh del Pino 1 , Ana Morales Cepeda 1
1 Instituto Tecnológico de Ciudad Madero, Departamento de Posgrado, Mexico.
Cellulose Nanofibers (CNF) films were prepared, parting from α-Cellulose which was
TEMPO Oxidized by Tsuguyuki Sito’s methodology [1], this oxidation reaction allows
the regioselective conversion of primary hydroxyl groups (C6) to carboxylate groups
[2-3]. Afterwards the reaction a TOCNF-COON a solution was washed by
centrifugation and homogenized with deionized water and it was storage in a fresh
and dark place, until the copper nanoparticles (Cu’s NP) incorporation. The Cu’s NP
synthesis was made by Cupper Sulfate CuSO 4 reduction with NaBH 4 [4], the CuSO 4
was solubilized in 5 mL of deionized water, then gelatin was added, the solution was
tuned until reach pH 12 using NaOH solution, subsequently the NaBH 4 was
incorporated to the solution as reducing agent [5], and was collocated in stirring for
30 min, after that time period the Cu’s NP have been formed, for remove the oxygen
from the solution hydrazine solution at 0.5 M was add. By using the “Rodrigues Filho
[6] cellulose substitution grade” was calculated, using the maximum valor the Cu’s
NP incorporation rate was 10, 15 and 25 %wt. The TOCNF-COONa solution was
collocated in ultrasonic bath for 30 min, 20 mL of ethanol was adding to made
favorable the Cu’s NP solubilization in the solution, afterwards the ultra-sonication
bath the TOCNF-COO(Cu’ NP) was formed. The film was developed above
Polyethylene terephthalate (PET) substrate by spin coating at 3000 rpm collocating
2 mL of the TOCNF-COO(Cu’ NP) solution. The CNF functional groups were
characterized by FTIR spectroscopy, the CNF’s crystalline phase and Cu’s NP
crystalline structure was studied by X-ray diffraction, also the Cu crystallite size was
calculated by Scherrer equation, the CNF and films morphology characterization
done by Scanning Electron Microscope (SEM) and atomic force microscopy (AFM),
the Cu’s NP distribution into the film is notorious by Energy Dispersive spectroscopy
(EDS) analysis, the thermal stability was studied through an Termogravimetric
Analysis (TGA), using the plasmon effect by Uv-vis spectroscopy was possible
determinate the nanoparticle’s size, because Cu’s NP have an absorption band at
589 nm and its evidence of particle size smaller than 10 nm.
Keywords: Cellulose Nanofibers, Copper nanoparticles, Films
Presenting authors email: macclesh_27@yahoo.com