dc.creator | García González, María del Carmen | es |
dc.creator | Trujillo-Cayado, Luis Alfonso | es |
dc.creator | Carmona Gallego, José Antonio | es |
dc.creator | Muñoz García, José | es |
dc.creator | Alfaro Rodríguez, María del Carmen | es |
dc.date.accessioned | 2024-01-02T15:42:35Z | |
dc.date.available | 2024-01-02T15:42:35Z | |
dc.date.issued | 2019-03-15 | |
dc.identifier.citation | García González, M.d.C., Trujillo-Cayado, L.A., Carmona Gallego, J.A., Muñoz García, J. y Alfaro Rodríguez, M.d.C. (2019). Flow, dynamic viscoelastic and creep properties of a biological polymer produced by Sphingomonas sp. as affected by concentration. International Journal of Biological Macromolecules, 125, 1242-1247. https://doi.org/10.1016/j.ijbiomac.2018.09.100. | |
dc.identifier.issn | 0141-8130 | es |
dc.identifier.issn | 1879-0003 | es |
dc.identifier.uri | https://hdl.handle.net/11441/152884 | |
dc.description.abstract | In this work, the influence of the concentration on the flow behaviour, dynamic viscoelastic and creep properties of diutan gum in aqueous solution was investigated. Diutan gum is a biopolymer which belongs to the sphingans group. To know its rheological properties and its microstructure as a function of the concentration is directly related to the current and future applications of this biological polymer. Mechanical spectra showed a crossover point between G′ and G″ which changed as a function of diutan gum concentration. A master curve for the frequency dependence on the η* was obtained. The creep compliance results made it possible to deduce the yield stress value and they were fitted to Burgers model. A shear-thinning behaviour was exhibited by diutan gum aqueous solutions, which was fitted to the Carreau-Yasuda model. Higher G′ G″ τ0 and η0 values and lower ωc, Je 0, γ̇c and n values were obtained by increasing the gum concentration, it is being possible to modulate the viscoelasticity, viscosity and shear resistance as a function of concentration. A more complex structure with stronger entanglements between macromolecules of diutan was obtained when the concentration of diutan increases. | es |
dc.description.sponsorship | Ministerio de Economía y Competitividad CTQ2015-70700-P | es |
dc.format | application/pdf | es |
dc.format.extent | 23 p. | es |
dc.language.iso | eng | es |
dc.publisher | Elsevier | es |
dc.relation.ispartof | International Journal of Biological Macromolecules, 125, 1242-1247. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Creep compliance | es |
dc.subject | Diutan gum | es |
dc.subject | Rheology | es |
dc.subject | Viscoelasticity | es |
dc.subject | Yield stress | es |
dc.title | Flow, dynamic viscoelastic and creep properties of a biological polymer produced by Sphingomonas sp. as affected by concentration | es |
dc.type | info:eu-repo/semantics/article | es |
dc.type.version | info:eu-repo/semantics/acceptedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Ingeniería Química | es |
dc.relation.projectID | CTQ2015-70700-P | es |
dc.relation.publisherversion | https://doi.org/10.1016/j.ijbiomac.2018.09.100 | es |
dc.identifier.doi | 10.1016/j.ijbiomac.2018.09.100 | es |
dc.journaltitle | International Journal of Biological Macromolecules | es |
dc.publication.volumen | 125 | es |
dc.publication.initialPage | 1242 | es |
dc.publication.endPage | 1247 | es |
dc.contributor.funder | Ministerio de Economía y Competitividad (MINECO). España | es |