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dc.contributor.authorGhosh, Suvojit
dc.contributor.authorTehrani, Mehran
dc.contributor.authorAl-Haik, Marwan S.
dc.contributor.authorPuri, Ishwar K.
dc.date.accessioned2017-09-20T18:21:16Z
dc.date.available2017-09-20T18:21:16Z
dc.date.issued2015-01-30
dc.identifier.citationGhosh, S.; Tehrani, M.; Al-Haik, M.S.; Puri, I.K. Patterning the Stiffness of Elastomeric Nanocomposites by Magnetophoretic Control of Cross-linking Impeder Distribution. Materials 2015, 8, 474-485.
dc.identifier.urihttp://hdl.handle.net/10919/79226
dc.description.abstractWe report a novel method to pattern the stiffness of an elastomeric nanocomposite by selectively impeding the cross-linking reactions at desired locations while curing. This is accomplished by using a magnetic field to enforce a desired concentration distribution of colloidal magnetite nanoparticles (MNPs) in the liquid precursor of polydimethysiloxane (PDMS) elastomer. MNPs impede the cross-linking of PDMS; when they are dispersed in liquid PDMS, the cured elastomer exhibits lower stiffness in portions containing a higher nanoparticle concentration. Consequently, a desired stiffness pattern is produced by selecting the required magnetic field distribution a priori. Up to 200% variation in the reduced modulus is observed over a 2 mm length, and gradients of up to 12.6 MPa·mm−1 are obtained. This is a significant improvement over conventional nanocomposite systems where only small unidirectional variations can be achieved by varying nanoparticle concentration. The method has promising prospects in additive manufacturing; it can be integrated with existing systems thereby adding the capability to produce microscale heterogeneities in mechanical properties.
dc.format.mimetypeapplication/pdf
dc.languageen_USen_US
dc.publisherMDPI
dc.rightsCreative Commons Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0
dc.titlePatterning the Stiffness of Elastomeric Nanocomposites by Magnetophoretic Control of Cross-linking Impeder Distributionen_US
dc.typeArticle - Refereeden_US
dc.date.updated2017-09-20T18:21:16Z
dc.title.serialMaterials
dc.identifier.doihttps://doi.org/10.3390/ma8020474
dc.type.dcmitypeText


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Creative Commons Attribution 4.0 International
License: Creative Commons Attribution 4.0 International