PDMS Sponges with Embedded Carbon Nanotubes as Piezoresistive Sensors for Human Motion Detection

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dc.contributor.authorHerren, Blake
dc.contributor.authorWebster, Vincent
dc.contributor.authorDavidson, Eric
dc.contributor.authorSaha, Mrinal C.
dc.contributor.authorAltan, M. Cengiz
dc.contributor.authorLiu, Yingtao
dc.date.accessioned2022-03-21T19:58:37Z
dc.date.available2022-03-21T19:58:37Z
dc.date.issued2021-07-01
dc.description.abstractPorous piezoresistive sensors offer promising flexible sensing functionality, such as human joint motion detection and gesture identification. Herein, a facile fabrication method is developed using a microwave-based rapid porogen removal technique for the manufacturing of porous nanocomposite sponges consisting of polydimethylsiloxane (PDMS) and well-dispersed carbon nanotubes (CNTs). The porogen amounts and CNT loadings are varied to tailor the porosity and electrical properties of the porous sensors. The sponges are characterized by a scanning electron microscope (SEM) to compare their microstructures, validate the high-quality CNT dispersion, and confirm the successful nanofiller embedding within the elastomeric matrix. Sponges with a 3 wt% CNT loading demonstrate the highest piezoresistive sensitivity. Experimental characterization shows that the sponges with low porosity have long durability and minimal strain rate dependence. Additionally, the developed sponges with 3 wt% CNTs are employed for the human motion detection using piezoresistive method. One experiment includes fingertip compression measurements on a prosthetic hand. Moreover, the sensors are attached to the chest, elbow, and knee of a user to detect breathing, running, walking, joint bending, and throwing motions.en_US
dc.description.peerreviewYesen_US
dc.description.sponsorshipThis research was funded by the support of the Vice President for Research and Partnerships of the University of Oklahoma. Open Access fees paid for in whole or in part by the University of Oklahoma Libraries.en_US
dc.identifier.citationHerren B, Webster V, Davidson E, Saha MC, Altan MC, Liu Y. PDMS Sponges with Embedded Carbon Nanotubes as Piezoresistive Sensors for Human Motion Detection. Nanomaterials. 2021; 11(7):1740. https://doi.org/10.3390/nano11071740en_US
dc.identifier.doi10.3390/nano11071740en_US
dc.identifier.urihttps://hdl.handle.net/11244/335052
dc.languageen_USen_US
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectPiezoresistive sensoren_US
dc.subjectWearable electronicsen_US
dc.subjectNanocomposite spongeen_US
dc.subjectHuman motion monitoringen_US
dc.subjectSemiconductorsen_US
dc.subjectCarbon nanotubesen_US
dc.subjectElastomersen_US
dc.subjectFlexible sensorsen_US
dc.titlePDMS Sponges with Embedded Carbon Nanotubes as Piezoresistive Sensors for Human Motion Detectionen_US
dc.typeArticleen_US
ou.groupGallogly College of Engineering::School of Aerospace and Mechanical Engineeringen_US

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