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dc.contributor.authorBelmonte Parra, Alberto
dc.contributor.authorLama, Giuseppe C.
dc.contributor.authorGentile, Gennaro
dc.contributor.authorCerruti, Pierfrancesco
dc.contributor.authorAmbrogi, Veronica
dc.contributor.authorFernández Francos, Xavier
dc.contributor.authorde la Flor1 López, Sílvia
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics
dc.date.accessioned2018-02-01T10:31:02Z
dc.date.available2019-12-01T01:26:04Z
dc.date.issued2017-12-01
dc.identifier.citationBelmonte, A., Lama, G., Gentile, G., Cerruti, P., Ambrogi, V., Fernandez-Francos, X., de la Flor, S. Thermally-triggered free-standing shape-memory actuators. "European polymer journal", 1 Desembre 2017, vol. 97, p. 241-252.
dc.identifier.issn0014-3057
dc.identifier.urihttp://hdl.handle.net/2117/113530
dc.description.abstractThis investigation presents a new approach to obtain free-standing thermally-triggered “two-way” shape-memory actuators by realizing multilayer structures constituted by glassy thermoset (GT) films anchored to a previously programmed liquid-crystalline network (LCN) film. The GT is obtained via dual-curing of off-stoichiometric “thiol-epoxy” mixtures, thus enabling the development of complex actuator configurations thanks to the easy processing in the intermediate stage, and a compact and resistant design due to the strong adhesion between the layers obtained upon the final curing stage of the GT. A model based on the classical multilayered beam theory to predict the maximum deflection of a “beam-like” design is proposed and its reliability is verified by experimental investigation of actuators with different configurations and LCN stretching levels. The results show the capability of these actuators to bend and unbend under various consecutive heating–cooling procedures in a controlled way. The maximum deflection can be modulated through the configuration and the LCN stretching level, showing an excellent fitting with the model predictions. The model is able to predict high actuation levels (angles of curvature ˜ 180°) and the bidirectional shape-memory behavior of the device as a function of the thickness, configuration of the layers, and the LCN stretching level. This approach enables the design of free-standing two-way actuators covering a range of bending actuation from 27 to 98% of the theoretical maximum deflection.
dc.format.extent12 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
dc.subject.lcshActuators
dc.subject.lcshCrystalline polymers
dc.subject.otherClick chemistry
dc.subject.otherDual-curing
dc.subject.otherLiquid-crystalline network
dc.subject.otherShape memory polymers
dc.subject.otherThermally-triggered actuators
dc.titleThermally-triggered free-standing shape-memory actuators
dc.typeArticle
dc.subject.lemacActuadors
dc.subject.lemacPolímers cristal·lins
dc.contributor.groupUniversitat Politècnica de Catalunya. POLTEPO - Polímers Termoestables Epoxídics
dc.identifier.doi10.1016/j.eurpolymj.2017.10.006
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0014305717313241?via%3Dihub
dc.rights.accessOpen Access
local.identifier.drac21635465
dc.description.versionPostprint (author's final draft)
local.citation.authorBelmonte, A.; Lama, G.; Gentile, G.; Cerruti, P.; Ambrogi, V.; Fernandez-Francos, X.; de la Flor, S.
local.citation.publicationNameEuropean polymer journal
local.citation.volume97
local.citation.startingPage241
local.citation.endingPage252


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