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dc.contributor.authorFerreira, Armando José Barrospor
dc.contributor.authorCorreia, Vítor Manuel Gomespor
dc.contributor.authorMendes, Emiliapor
dc.contributor.authorLopes, Cláudia Jesus Ribeiropor
dc.contributor.authorVaz, F.por
dc.contributor.authorLanceros-Méndez, S.por
dc.identifier.citationFerreira, A., Correia, V., Mendes, E., Lopes, C., Vaz, J. F. V., & Lanceros-Mendez, S. (2017). Piezoresistive Polymer-Based Materials for Real-Time Assessment of the Stump/Socket Interface Pressure in Lower Limb Amputees. IEEE Sensors Journal, 17(7), 2182-2190por
dc.description.abstractThe present work reports a suitable piezoresistive Carbon Nanotubes / poly(vinylidene fluoride) - CNT/PVDF composite capable of measuring the interface pressure within prosthetic stump/sockets. The transducers were prepared by hot pressing with CNT, with sample concentrations up to 10 wt.%. The sensibility (Gauge Factor) of the composites was characterized using a mechanical testing equipment and the values reached 6.2. After the optimization of the materials, tests were conducted with a prototype placed in lower limb amputee patients, performing several standing and walking protocols. The prototype was tested in four lower limb amputees using a CNT concentration of 2 wt.% within the PVDF matrix. The transducers were fabricated with dimensions of 10×25 mm2 and ~1mm of thickness functionalized with Ti-Ag thin film electrodes at the surface. To acquire the electrical signal, an electronic circuit was developed with a wireless data acquisition system. The results suggest a strong application potential of the developed sensor prototype, namely as a complementary diagnostic tool, supporting socket design and rectification, being therefore an effective mean to increase patients’ quality of life.por
dc.description.sponsorshipPortuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UID/FIS/04650/2013 and project PTDC/EEI-SII/5582/2014). FCT for grant SFRH/BPD/102402/2014 and SFRH/BPD/97739/2013 grants. Financial support from the Basque Government Industry Department under the ELKARTEK Program is also acknowledged. To CRPG –Centro de Reabilitação Profissional de Gaia, Portugal, and to the amputees who participated in the studypor
dc.subjectSensor systempor
dc.subjectData acquisitionpor
dc.subjectData transmissionpor
dc.subjectSkin – sock interfacepor
dc.titlePiezoresistive polymer-based materials for real-time assessment of the stump/socket interface pressure in lower limb amputeespor
dc.subject.fosCiências Naturais::Ciências Físicaspor
dc.subject.wosScience & Technologypor
sdum.journalIEEE Sensors Journalpor
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

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