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[EN] Broadband Dielectric Relaxation Spectroscopy was performed to study the molecular dynamics of dried Bacterial Cellulose/Carboxymethyl Cellulose-Graphene Oxide (BC/CMC-GO) composites as a function of the concentration of CMC in the culture media. At low temperature the dielectric spectra are dominated by a dipolar process labelled as a beta -relaxation, whereas electrode polarization and the contribution of dc-conductivity dominate the spectra at high temperatures and low frequency. The CMC concentration affects the morphological structure of cellulose and subsequently alters its physical properties. X-ray diffractometry measurements show that increasing the concentration of CMC promotes a decrease of the Ia/Ib ratio. This structural change in BC, that involves a variation in inter- and intramolecular interactions (hydrogen-bonding interactions), affects steeply their molecular dynamics. So, an increase of CMC concentration produces a significantly decrease of the -relaxation strength and an increase of the dc-conductivity.

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RiuNet. Repositorio institucional de la Universitat de Valencia  

Autor(es)

Sanchis Sánchez, María Jesús -  Carsí Rosique, Marta -  Gomez, C. M. -  Culebras, M. -  Gonzales, K.N. -  Gisbert Torres, Fernando - 

Id.: 71305322

Idioma: eng  - 

Versión: 1.0

Estado: Final

Palabras claveBacterial cellulose composites - 

Tipo de recurso: info:eu-repo/semantics/article  -  info:eu repo/semantics/publishedVersion  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: Reserva de todos los derechos

Requerimientos técnicos:  Browser: Any - 

Relación: [References] Ministerio de Economía y Competitividad/MAT2015-63955-R
[References] Carbohydrate Polymers
[References] http://dx.doi.org/10.1016/j.carbpol.2016.10.001

Fecha de contribución: 24-may-2018

Contacto:

Localización:
* 0144-8617
* 10.1016/j.carbpol.2016.10.001

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