Ceramic nanoparticles and carbon nanotubes reinforced thermoplastic materials for piezocapacitive sensing applications

Marinho, T.; Lizundia, Erlantz; Costa, Carlos M.; Corona-Galván, S.; Lanceros‐Méndez, S.

doi:10.1016/j.compscitech.2019.107804

Cited by 13 publications

(13 citation statements)

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“…The dielectric properties of PANI/acrylic composites showed strong potential for the development of force transducer arrays, capable of providing a capacitive variation response when subjected to external stimulus such as finger touch or human weight, among others. [3,16] The operation of a piezocapacitive transducer is based on the variation of the capacitance of the materials, typically based on the variation of the distance between the electrodes under pressure.…”

Section: Piezocapacitive Measurementsmentioning

confidence: 99%

“…[ 1 ] In this context, dielectric polymeric materials are being investigated due to their scientific and technological interest since they combine dielectric properties with appropriate mechanical flexibility and simple processability. [ 2,3 ] Such composite materials show huge opportunities to be integrated in devices such as electronics, [ 4–6 ] sensors and actuators. [ 7 ]…”

Section: Introductionmentioning

confidence: 99%

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mentioning

confidence: 99%

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Photocurable Printed Piezocapacitive Pressure Sensor Based on an Acrylic Resin Modified with Polyaniline and Lignin

Arias-Ferreiro

Ares‐Pernas

Lasagabáster-Latorre

et al. 2022

Adv Materials Technologies

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In this context, dielectric polymeric materials are being investigated due to their scientific and technological interest since they combine dielectric properties with appropriate mechanical flexibility and simple processability. [2,3] Such composite materials show huge opportunities to be integrated in devices such as electronics, [4][5][6] sensors and actuators. [7] Within this context, additive manufacturing emerges as a set of advanced fabrication techniques that enable the production of fully functional electronic devices in one step printing. [1,[8][9][10] However, for photopolymerization-based 3D printing techniques the number of UV curable materials suitable for the fabrication of sensors and actuators is still scarce. [1] Research in this field pursues 3D printing materials with new features but also environmentally more friendly and sustainable, as demanded by today's society. [11][12][13] Techniques as stereolithography (SLA) and digital light processing (DLP) are based on the layer-by-layer solidification of a liquid photosensitive resin via UV-light exposure. [14] This is a tailorable process where multicomponent resins provide the photo-rheological and mechanical properties necessary to ensure a successful print. [15] The design of suitable materials for the manufacture of pressure sensors with high sensitivity and flexibility in wearable electronics is still a challenge. In this study, a flexible and portable pressure sensor is developed based on a photopolymeric formulation of polyaniline (PANI)/Lignin/acrylate. The amount of photoinitiator and the presence of lignin within the filler are investigated to obtain the best printability and capacitive response. Low PANI contents drastically increase the dielectric constant and 4 wt% photoinitiator improves the signal and sensitivity. A sensitivity of 0.012 kPa -1 is achieved in a linear range (0-10 kPa) with only 3.5 wt% PANI. Lignin improves both the dispersion of the filler within the matrix and the printability of the resin, due to lower absorptivity at the UV wavelength of the 3D printer. Thus, the PANI-Lignin filler is selected for the fabrication of a piezocapacitive prototype transducer. The pressure transducer demonstrate its practical application by responding to a human footfall and transmitting its corresponding electrical signal. This study shows the enhanced properties of lignin modified PANI acrylate composites. Based on lignin, an abundant natural waste, a sustainable photocurable cost-effective polymer is proposed for the fabrication of printable, wearable electronics.

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Section: Piezocapacitive Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…

…”

mentioning

confidence: 99%

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Photocurable Printed Piezocapacitive Pressure Sensor Based on an Acrylic Resin Modified with Polyaniline and Lignin

Arias-Ferreiro

Ares‐Pernas

Lasagabáster-Latorre

et al. 2022

Adv Materials Technologies

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“…Once the corresponding amount of polymer and solvent were added, the mixture was magnetically stirred for 3 h at 30 • C until complete polymer dissolution. For the PVDF composite, the corresponding amount of BT nanoparticles (30 weight percentage (wt.%) to maximize dielectric response were maintaining mechanically flexible films [23]) were homogeneously dispersed in DMF in an ultrasonic bath at 25-35 • C for 2 h, then the PVDF was added and the mixture was magnetically stirred for 3 h at 30 • C.…”

Section: Sample Preparationmentioning

confidence: 99%

Triboelectric Energy Harvesting Response of Different Polymer-Based Materials

et al. 2020

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Energy harvesting systems for low-power devices are increasingly being a requirement within the context of the Internet of Things and, in particular, for self-powered sensors in remote or inaccessible locations. Triboelectric nanogenerators are a suitable approach for harvesting environmental mechanical energy otherwise wasted in nature. This work reports on the evaluation of the output power of different polymer and polymer composites, by using the triboelectric contact-separation systems (10 N of force followed by 5 cm of separation per cycle). Different materials were used as positive (Mica, polyamide (PA66) and styrene/ethylene-butadiene/styrene (SEBS)) and negative (polyvinylidene fluoride (PVDF), polyurethane (PU), polypropylene (PP) and Kapton) charge materials. The obtained output power ranges from 0.2 to 5.9 mW, depending on the pair of materials, for an active area of 46.4 cm2. The highest response was obtained for Mica with PVDF composites with 30 wt.% of barium titanate (BT) and PA66 with PU pairs. A simple application has been developed based on vertical contact-separation mode, able to power up light emission diodes (LEDs) with around 30 cycles to charge a capacitor. Further, the capacitor can be charged in one triboelectric cycle if an area of 0.14 m2 is used.

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“…Flexible energy harvesting devices are typically achieved using polymers that sometimes are also tailored by combining the polymer matrix with a reinforcement material, obtaining flexible composites with improved harvesting properties . Within the short family of piezoelectric polymers, , electroactive poly(vinylidene fluoride) (PVDF) and its family are the ones with the larger piezoelectric response, in particular when the polymer is processed in the highly polar β-phase. , As previously mentioned, PVDF and copolymers present the highest electroactive properties among polymers, , though the functional response is considerably lower when compared to ceramics. , The combination of PVDF with high-dielectric ceramic materials has been used to develop composites with higher dielectric and piezoelectric response, , though this leads to a decrease in the flexibility and transparency of the material . Thus, when flexible and transparent applications are required, allied to simple processing, pristine PVDF and copolymers are exceptional options for smart material applications in areas such as sensors, , energy harvesting, , or a combination of both, , among several others.…”

Section: Introductionmentioning

confidence: 99%

Transparent Piezoelectric Polymer-Based Materials for Energy Harvesting and Multitouch Detection Devices

Rodrigues-Marinho

Pereira

Correia

et al. 2021

ACS Appl. Electron. Mater.

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Energy harvesting devices allowing to recover wasted energy from the environment are increasingly being developed. Mechanical energy is one of the most interesting sources for energy harvesting, and piezoelectric materials present excellent overall properties for the scavenging of that energy. Piezoelectric polymers, and, in particular, poly(vinylidene fluoride), show appropriate mechanical properties for large amplitude movements, higher piezoelectric coefficients, and transparency and can be easily integrated into devices. A transparent piezoelectric energy harvesting device has been developed with screen-printed transparent (72%) and conductive (42 Ω/sq) electrodes on PVDF sheets with a d 33 = −23 pC/N, generating about P ∼ 12 μW and P ∼ 8 μW under pressing and bending modes, corresponding to an energy per cycle of E∼ 37 nJ and E ∼ 55 nJ, respectively. The piezoelectric energy harvesting characteristics of the materials have been also theoretically evaluated, and the applicability of the materials for touch detection has been demonstrated.

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Ceramic nanoparticles and carbon nanotubes reinforced thermoplastic materials for piezocapacitive sensing applications

Cited by 13 publications

References 67 publications

Photocurable Printed Piezocapacitive Pressure Sensor Based on an Acrylic Resin Modified with Polyaniline and Lignin

Photocurable Printed Piezocapacitive Pressure Sensor Based on an Acrylic Resin Modified with Polyaniline and Lignin

Triboelectric Energy Harvesting Response of Different Polymer-Based Materials

Transparent Piezoelectric Polymer-Based Materials for Energy Harvesting and Multitouch Detection Devices

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