Characterization of Ferrofluid-based Stimuli-responsive Elastomers
Pedro, Sandra de (Institut de Microelectrònica de Barcelona)
Muñoz Berbel, Xavier (Institut de Microelectrònica de Barcelona)
Rodríguez-Rodríguez, Rosalía (Universidad de Sevilla. Departamento de Farmacología)
Sort Viñas, Jordi (Institució Catalana de Recerca i Estudis Avançats)

Date:	2016
Abstract:	Stimuli-responsive materials undergo physicochemical, and/or structural changes when a specific actuation is applied. They are heterogeneous composites, consisting of a non-responsive matrix where functionality is provided by the filler. Surprisingly, the synthesis of Polydimethylsiloxane (PDMS)-based stimuli-responsive elastomers (SRE) has seldomly been presented. Here we present the structural, biological, optical, magnetic and mechanical properties of several magnetic SRE (M-SRE) obtained by combining PDMS and isoparafin-based ferrofluid (FF). Independently of the FF concentration, results shown a similar aggregation level, with the nanoparticles (NP) mostly isolated (>60%). In addition to the superparamagnetic behaviour, the samples show no cytotoxicity except the sample with the highest FF concentration. Spectral response shows FF concentrations where both optical readout and magnetic actuation can simultaneously be used. The Young's modulus increases with the FF concentration until the elastomeric network is distorted. Our results demonstrate that PDMS can host up to 24. 6% FF. When applied to soft microsystems, a large displacement for relatively low magnetic fields (< 0. 3 T) is achieved. The herein presented M-SRE characterization can be used for a large number of disciplines where magnetic actuation can be combined with optical detection, mechanical elements and biological samples.
Grants:	European Commission 209243 Ministerio de Ciencia e Innovación TEC2011-29140-C03-01 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1015
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Stimuli-responsive materials ; Elastomers ; Ferrofluids
Published in:	Frontiers in Mechanical Engineering, Vol. 2 Núm. 12 (2016) , p. 1-10

DOI: 10.3389/fmech.2016.00012

10 p, 2.1 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Group of Smart Nanoengineered Materials, Nanomechanics and Nanomagnetism (Gnm3)
Articles > Research articles
Articles > Published articles