Abstracts Book - IMRC 2018

• SB1-P056
CHARACTERIZATION OF THERMAL PROPERTIES OF PVDF
NANOFIBERS INCORPORATED WITH SILVER NANOPARTICLES BY
PHOTOTHERMAL METHODS.
Wilson Melgares Camacho 1 , Eduardo San Martín Martinez 1 , Alfredo Cruz Orea 2
1 Instituto Politécnico Nacional - IPN, CICATA Legaria, Mexico. 2 Cinvestav Zacatenco, Física,
Mexico.
In this study Photothermal techniques were used to investigate the thermal
properties (Thermal Diffusivity, Effusivity and Conductivity) of samples based on
polyvinylidene difluoride (PVDF) polymeric nanofibers (NFs) incorporated with
silver nanoparticles (Ag-NPs), at different concentrations, in order to analyze the
Ag-NPs thermal effect on the polymeric matrix. The Ag-NPs were synthesized by
using sol gel and microwave assisted methods, which have advantages over
conventional synthesis. The composite of PVDF nanofibers with silver
nanoparticles was obtained by electrospinning technique, varying the
processing parameters. The UV-Vis characteristic spectrum of the nanoparticles
was obtained, also the hydrodynamic radio of Ag-NPs, determined by
Nanozetasizer, was 16 nm and the obtained potential z, that it is a measure of
the magnitude of the repulsion or electrical attraction between the particles, and
it is one of the fundamental parameters that are known and determinate the
stability of nanoparticles, this was 0.03 mV. The nanofiber morphologies,
incorporated with Ag-NPs, were observed by Scanning Electron Microscopy
(SEM), these morphologies show cylindrical fibers of diameters ranging 159 nm
to 658 nm. By using also Transmission Electron Microscopy (TEM) it was possible
to observe the incorporation and distribution of Ag-NPs in the PVDF nanofibers.
The thermal effects of Ag-NPs on the polymeric matrix were reflected in their
thermal properties, in particular the obtained thermal conductivity increases
0.12 W / mK to 0.34 W / mK when the Ag-NPs concentration was increased 4%
to 12% in the polymeric matrix.
Acknowledgment:
W. Melgares thanks for the scholarship program granted by the National Council
of Sciences and Technology (CONACYT) and the Institutional Support for
Research Incentive Grant (BEIFI). The authors also thank the partial financial
support CONACYT through the project No. 241330. We also thank Ing. Esther