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dc.contributor.authorSuarez-Fernandez, William
dc.contributor.authorScionti, Giuseppe
dc.contributor.authorGarcía López-Durán, Juan De Dios 
dc.contributor.authorZubarev, Andrey
dc.contributor.authorLópez López, Modesto Torcuato 
dc.date.accessioned2021-04-05T08:00:34Z
dc.date.available2021-04-05T08:00:34Z
dc.date.issued2020
dc.identifier.citationPhilosophical Transactions of the Royal Society A 378 (2171), 20190254es_ES
dc.identifier.urihttp://hdl.handle.net/10481/67766
dc.description.abstractEven in absence of cross-linking, at large enough concentration, long polymer strands have a strong influence on the rheology of aqueous systems. In this work, we show that solutions of medium molecular weight (120,000 – 190,000 g/mol) alginate polymer retained a liquid-like behaviour even for concentrations as large as 20 % w/v. On the contrary, solutions of alginate polymer of larger (and also polydisperse) molecular weight (up to 600,000 g/mol) presented a gel-like behaviour already at concentrations of 7 % w/v. We dispersed micron-sized iron particles at a concentration of 5 % v/v in these solutions, which resulted either in stable magnetic fluids or gels, depending on the type of alginate polymer employed (medium or large molecular weight, respectively). These magneto-polymer composites presented a shear-thinning behaviour that allowed injection through a syringe and recovery of the original properties afterwards. More interestingly, application of a magnetic field resulted in the formation of particle clusters elongated along the field direction. The presence of these clusters intensely affected the rheology of the systems, allowing a reversible control of their stiffness. We finally developed theoretical modelling for the prediction of the magnetic-sensitive rheological properties of these magneto-polymer colloids.es_ES
dc.description.sponsorshipMinisterio de Economía, Industria y Competitividad, MINECO, and Agencia Estatal de Investigación, AEI, Spain, cofounded by Fondo Europeo de Desarrollo Regional, FEDER, European Union, project FIS2017-85954-R. Ministry of Education and Science of the Russian Federation, projects 02.A03.21.0006; 3.1438.2017/4.6; 3.5214.2017/6.7 as well as to the Russian Fund of Basic Researches, project 19-52-12028es_ES
dc.language.isoenges_ES
dc.titleRole of particle clusters on the rheology of magneto-polymer fluids and gelses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.identifier.doihttp://dx.doi.org/10.1098/rsta.2019.0254
dc.type.hasVersioninfo:eu-repo/semantics/acceptedVersiones_ES


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