Capacitive pressure sensor inlaid a porous dielectric layer of superelastic polydimethylsiloxane in conductive fabrics for detection of human motions

Li, Siming; Dong, Ke; Li, Ruiqing; Huang, Xiayan; Chen, Tianjiao; Xiao, Xueliang

doi:10.1016/j.sna.2020.112106

Cited by 59 publications

(26 citation statements)

References 28 publications

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“…Undoubtedly, softness and elasticity are vital components of materials used in design of flexible sensors . Among various available options for material selection, including polyimide (PI), polydimethylsiloxane (PDMS), poly(vinylidene fluoride) (PVDF), polytetrafluoroethylene (PTFE), polyurethane (PU), etc., − thermoplastic polyurethane (TPU) demonstrates excellent elasticity and flexibility, good chemical stability, facility of processing, and cost-efficiency. − As a result of these advantages, TPU-based materials are extensively utilized in medical equipment, automotive parts, and intelligent materials . Moreover, TPU depicts a strong affinity with numerous types of conductive materials, especially carbonaceous and metallic nanomaterials .…”

Section: Introductionmentioning

confidence: 99%

Recent Advances of Flexible Strain Sensors Based on Conductive Fillers and Thermoplastic Polyurethane Matrixes

Chen

Xie

Wang

et al. 2021

ACS Appl. Polym. Mater.

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Over recent years, flexible strain sensors have been playing an increasingly important role, especially in wearable electronics, healthcare equipment, electronic skins (e-skins), and soft robots. Numerous materials are utilized in these applications; however, thermoplastic polyurethane (TPU) is prominently used for its elastomer-like behavior, suitable flexibility, and facility of combination with diverse conductive materials. These characteristics satisfy the growing demands for better stretchability, higher sensitivity, and a wider workable sensing range of flexible strain sensors. In this review paper, recent progress on TPU-based strain sensors is tracked and discussed, including carbonaceous entities, silver nanomaterials, and conductive polymers in terms of various conductive materials first. Afterward, exciting and effective designing of macro- and microstructures, as well as their influence on the performance of strain sensors, is discussed. Finally, TPU-based strain sensors’ wide applications and distinctive multifunctionality are presented and reviewed. This review paper presents the profound significance and attractive prospects of TPU-based flexible strain sensors in the design and development of intelligent devices.

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Section: Introductionmentioning

confidence: 99%

Recent Advances of Flexible Strain Sensors Based on Conductive Fillers and Thermoplastic Polyurethane Matrixes

Chen

Xie

Wang

et al. 2021

ACS Appl. Polym. Mater.

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“…where ρ foam = 1100 kg/m 3 [31]. By varying the weight concentration of PDMS in the immersion solution, the PDMS-30 foam sample showed porosity that exceeded 86%, i.e., nearly 19 times higher than that of the bare PDMS foam (Fig.…”

Section: Resultsmentioning

confidence: 97%

“…Jung et al showed that a PDMS and microsphere composite could be applied to a capacitive pressure sensor by maximizing the porosity of microspheres via the effect of high compressibility and an enhanced piezocapacitive effect [9]. Li et al also reported a pressure sensor based on a dielectric layer of PDMS with uniformly distributed micropores which displayed high elasticity, a wide pressure-sensing range (> 200 kPa), and high sensitivity (0.023 kPa −1 ) [31].…”

Section: Introductionmentioning

confidence: 99%

Hollow polydimethylsiloxane (PDMS) foam with a 3D interconnected network for highly sensitive capacitive pressure sensors

Kim

Jung

Jung³

et al. 2020

Micro and Nano Syst Lett

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We propose a highly sensitive capacitive pressure sensor made of hollow polydimethylsiloxane (PDMS) foam with a three-dimensional network structure. The stiffness of the foam is adjusted by the viscosity of the PDMS solution. The fabricated PDMS-30 (PDMS 30 wt%) foam shows extremely high porosity (> 86%) approximately 19 times that of bare PDMS (PDMS 100 wt%) foam. Capacitive pressure sensors fabricated using the foam possess high sensitivity, good compressibility (up to 80% strain), and consistent output characteristics in a 2000-cycle test.

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“…Of great interest is the production of highly porous foams based on PDMS itself, which are used in an extremely wide range of applications: from the water purification from hydrophobic impurities tasks, to biomedical devices, flexible microfluidic devices, electronic skin for prostheses and robots (bionic system designed to imitate some physiological properties of human skin), epidermal electronics, highly sensitive capacitive pressure sensors, etc. [58][59][60][61]. Porous structures are most often obtained by coating a PDMS layer on different porous templates, which is followed by removal of the substrate.…”

Section: Pdms Role In Pore Nucleation Process During Decompressionmentioning

confidence: 99%

Organosilicone Compounds in Supercritical Carbon Dioxide

et al. 2022

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This review considers the key advantages of using supercritical carbon dioxide as a solvent for systems with organosilicon compounds. Organosilicon polymeric materials synthesis as well as the creation and modification of composites based on them are discussed. Polydimethylsiloxane and analogues used as polymerization stabilizers and nucleation promoters in pore formation processes are analyzed as well.

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Capacitive pressure sensor inlaid a porous dielectric layer of superelastic polydimethylsiloxane in conductive fabrics for detection of human motions

Cited by 59 publications

References 28 publications

Recent Advances of Flexible Strain Sensors Based on Conductive Fillers and Thermoplastic Polyurethane Matrixes

Recent Advances of Flexible Strain Sensors Based on Conductive Fillers and Thermoplastic Polyurethane Matrixes

Hollow polydimethylsiloxane (PDMS) foam with a 3D interconnected network for highly sensitive capacitive pressure sensors

Organosilicone Compounds in Supercritical Carbon Dioxide

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