dc.contributor.advisor |
Aqueveque Navarro, Pablo Esteban; supervisor de grado |
es |
dc.contributor.advisor |
Ramalinga Viswanathan, Mangalaraja; supervisor de grado |
es |
dc.contributor.author |
Vennu, Divya |
es |
dc.date.accessioned |
2021-07-09T18:37:18Z |
|
dc.date.available |
2021-07-09T18:37:18Z |
|
dc.date.issued |
2021 |
|
dc.identifier.uri |
http://repositorio.udec.cl/jspui/handle/11594/6805 |
|
dc.description |
Tesis para optar al grado de Magíster en Ciencias de la Ingeniería con mención en Ingeniería Eléctrica. |
es |
dc.description.abstract |
The demand of flexible electronic devices led the scientific community to develop
novel electroactive materials for various sensing devices to realize them in the
potential applications in health monitoring, robotics, electronic skin and
diagnostics. Especially, monitoring the human activities using integrated sensors
are dedicated to non/invasive measurements such as pressure and force are
seen in dielectric and piezoelectric applications. Currently, capacitive sensors with
various dielectric materials with high sensitivity are realized as low power
electronics devices in prosthetics, humanoids, structural health monitoring,
biomedical and planter pressure monitoring in neurogenerative pathology
applications. Materials for the capacitive sensors generally consist of electroactive
polymers and ceramics as dielectric layer. Polymers which are flexible, robust are
widely used and have low dielectric properties. On the other hand, ceramic having
high dielectric properties are restricted its widespread usage due to brittle/rigid in
nature. Currently, polymer nanocomposite with synergetic properties of polymer
matrix and ceramic fillers are realized for capacitive pressure sensors.
The present work is intended to develop a polymer-ZnO based nanocomposite
and to fabricate a flexible capacitive pressure sensor. Zinc oxide nanostructures
modified with graphene greatly influenced the crystallinity and showed strong
interaction with polyvinyldine fluoride matrix. Frequency dependent dielectric
studies suggests the PVDF-ZnO-Gr nanocomposite shows the higher permittivity
(~30 at 100 Hz) than PVDF-ZnO (~20 at 100Hz) nanocomposite. The
electromechanical performance was investigated by measuring the change in
capacitance response under various load conditions. The capacitive pressure sensing response is considerably higher than that of the pristine PVDF-based
device. The significant change in capacitance upon load is observed by the
induced electrical potential due to displacement of electrodes and change in
spacing between the fillers in the polymer matrix. |
es |
dc.language.iso |
spa |
es |
dc.publisher |
Universidad de Concepción. |
es |
dc.rights |
Creative Commoms CC BY NC ND 4.0 internacional (Atribución-NoComercial-SinDerivadas 4.0 Internacional) |
|
dc.rights.uri |
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es |
|
dc.subject |
Materiales Nanocompuestos |
|
dc.subject |
Transductores de Presión |
|
dc.subject |
Sensores Táctiles |
|
dc.subject |
Aplicaciones Industriales |
|
dc.title |
Development of ferroelectric nanocomposite for capacitive pressure sensors. |
es |
dc.type |
Tesis |
es |
dc.description.facultad |
Departamento de Ingeniería Eléctrica |
es |
dc.description.departamento |
Departamento de Ingeniería Eléctrica. |
es |