Protein-Based Flexible Conductive Aerogels for Piezoresistive Pressure Sensors

Yuan, Yusheng; Solin, Niclas

doi:10.1021/acsabm.2c00348

Cited by 13 publications

(11 citation statements)

References 70 publications

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“…The main factor affecting the sensitivity of the aerogel at this time is the recovery after deformation. Its higher sensitivity in the range of 0–2 kPa is superior not only to carbon-based materials − but also to flexible substrates loaded with conductive fillers ,,− (Figure e).…”

Section: Resultsmentioning

confidence: 99%

Cellulose Nanofibers/PEDOT:PSS Conductive Aerogel for Pressure Sensing Prepared by a Facile Freeze-Drying Method

Yan

Wang

et al. 2023

ACS Appl. Polym. Mater.

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The application of flexible wearable pressure sensors in the fields of pressure sensing, electronic skin, and human health monitoring has attracted a lot of attention. Herein, cellulose-nanofiber (CNF)-based aerogels with conducting polymer poly(3,4-ethylene dioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) and glutaraldehyde (GA) as cross-linking agent were designed and prepared by sol–gel cross-linking and freeze-drying. Without any special treatment, these aerogels presented good flexibility and piezoresistive properties. As the analysis of SEM, Raman spectrum, and XPS, the introduction of GA not only improves the mechanical properties of aerogel (the compressive strength at 80% strain has increased from 48 to 66 kPa) but also affects the doping state of PEDOT, which improves the sensitivity of aerogel (from 10.65 to 15.18 kPa–1). In addition, the sensor has been successfully applied to monitor human movements, including not only large movements (joint movements) but also small-scale muscle movements (cheek puffing and articulation recognition). It shows its potential as a widely used green pressure sensor.

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Section: Resultsmentioning

confidence: 99%

Cellulose Nanofibers/PEDOT:PSS Conductive Aerogel for Pressure Sensing Prepared by a Facile Freeze-Drying Method

Yan

Wang

et al. 2023

ACS Appl. Polym. Mater.

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“…Copyright at Advanced Functional Materials, 2021 (g) protein nanofibers can be used to improve the mechanical properties of gelatin aerogels and increase their elasticity. 133 Reproduced with permission. Copyright at ACS Applied Bio Materials, 2022 (h) current-time (I-t) curves of the sensor when repeatedly applying and removing a weight corresponding to a pressure of 41.6 kPa (1000 cycles).…”

Section: Conductive Sensitive Materialsmentioning

confidence: 99%

“…Copyright at ACS Applied Bio Materials, 2022 (h) current-time (I-t) curves of the sensor when repeatedly applying and removing a weight corresponding to a pressure of 41.6 kPa (1000 cycles). 133 Reproduced with permission. Copyright at ACS Applied Bio Materials, 2022 (i) average sensitivity of five independently prepared LPNF : GEL : PEDOT-S (2.7 : 8 : 1) aerogels.…”

Section: Conductive Sensitive Materialsmentioning

confidence: 99%

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Flexible resistive tactile pressure sensors

Shu,

Pang,

et al. 2024

J. Mater. Chem. A

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“…The composite aerogel shows excellent electrical conductivity, and its applications in piezoresistive sensors have been demonstrated (the sensitivity is 0.18 kPa –1 when the compressive stress is within 0–1.5 kPa). In addition, other conductive materials, such as various metal nanowires, − polypyrrole, polythiophene, and so on, have also been used for preparing the aerogel piezoresistive sensors. Although many aerogel piezoresistive sensors have been reported, it remains a challenge to realize aerogel piezoresistive sensors with high linear sensitivity in a wide stress range.…”

Section: Introductionmentioning

confidence: 99%

Lightweight and Mechanically Robust MXene/Polyimide/Silver Nanowire Composite Aerogels for Flexible Piezoresistive Sensors

Xu,

Chen,

Zheng

et al. 2023

ACS Appl. Nano Mater.

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Two-dimensional transition-metal carbides and nitrides (MXenes) show great potential in aerogel flexible piezoresistive sensors owing to their versatile surface chemistry, high carrier mobility, outstanding metallic conductivity, and adjustable interlayer spacing under applied stress. However, the pure MXene aerogel exhibits significant plastic deformation or brittle mechanical performance due to the weak interactions between the nanosheets. Herein, a series of MXene/polyimide/silver nanowire composite aerogels with aligned lamellar microstructure are fabricated by bidirectional freezing and annealing strategies. The introduction of polyimide (PI) and silver nanowires (AgNWs) significantly improves the mechanical properties of the MXene-based aerogel. The obtained lightweight composite aerogel shows superelasticity with large reversible compressibility, excellent stability, and outstanding fatigue resistance. Moreover, owing to the highly aligned lamellar microstructure of the composite aerogel and the excellent conductivity of MXene and AgNWs, the composite aerogel exhibits great sensing performance with high sensitivity (gauge factor ∼27.8) and ultralow detection limit (<0.6 Pa). Based on the MXene/PI/AgNW composite aerogels, a series of wearable sensor applications are demonstrated.

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Protein-Based Flexible Conductive Aerogels for Piezoresistive Pressure Sensors

Cited by 13 publications

References 70 publications

Cellulose Nanofibers/PEDOT:PSS Conductive Aerogel for Pressure Sensing Prepared by a Facile Freeze-Drying Method

Cellulose Nanofibers/PEDOT:PSS Conductive Aerogel for Pressure Sensing Prepared by a Facile Freeze-Drying Method

Flexible resistive tactile pressure sensors

Lightweight and Mechanically Robust MXene/Polyimide/Silver Nanowire Composite Aerogels for Flexible Piezoresistive Sensors

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