Publicación:
Monitoring molecular dynamics of bacterial cellulose composites reinforced with graphene oxide by carboxymethyl cellulose addition
Monitoring molecular dynamics of bacterial cellulose composites reinforced with graphene oxide by carboxymethyl cellulose addition
| dc.contributor.author | Sanchis M.J. | es_PE |
| dc.contributor.author | Carsí M. | es_PE |
| dc.contributor.author | Gómez C.M. | es_PE |
| dc.contributor.author | Culebras M. | es_PE |
| dc.contributor.author | Gonzales K.N. | es_PE |
| dc.contributor.author | Torres F.G. | es_PE |
| dc.date.accessioned | 2024-05-30T23:13:38Z | |
| dc.date.available | 2024-05-30T23:13:38Z | |
| dc.date.issued | 2017 | |
| dc.description | This work was supported by the DGCYT [MAT2015-63955-R]; the Vice-Rectorate for Research of the Pontificia Universidad Católica del Perú and the National Council of Science, Technology and Technological Innovation of Peru (CONCYTEC/FONDECYT). | |
| dc.description.abstract | 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 β-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 Iα/Iβ 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 β-relaxation strength and an increase of the dc-conductivity. | |
| dc.description.sponsorship | Fondo Nacional de Desarrollo Científico y Tecnológico - Fondecyt | |
| dc.identifier.doi | https://doi.org/10.1016/j.carbpol.2016.10.001 | |
| dc.identifier.scopus | 2-s2.0-84990852265 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.12390/625 | |
| dc.language.iso | eng | |
| dc.publisher | Elsevier Ltd | |
| dc.relation.ispartof | Carbohydrate Polymers | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.subject | X ray diffraction analysis | |
| dc.subject | Cellulose | es_PE |
| dc.subject | Dielectric relaxation | es_PE |
| dc.subject | Graphene | es_PE |
| dc.subject | Hydrogen bonds | es_PE |
| dc.subject | Spectroscopy | es_PE |
| dc.subject | Temperature | es_PE |
| dc.subject | Thermodynamic stability | es_PE |
| dc.subject | Bacterial cellulose | es_PE |
| dc.subject | Broadband dielectric relaxation spectroscopy | es_PE |
| dc.subject.ocde | https://purl.org/pe-repo/ocde/ford#1.04.00 | |
| dc.title | Monitoring molecular dynamics of bacterial cellulose composites reinforced with graphene oxide by carboxymethyl cellulose addition | |
| dc.type | info:eu-repo/semantics/article | |
| dspace.entity.type | Publication |