Ultralight and flexible silver nanoparticle-wrapped “scorpion pectine-like” polyimide hybrid aerogels as sensitive pressor sensors with wide temperature range and consistent conductivity response

Xu, Huikang; Chen, Weijun; Wang, Chengyang; Jia, Tingting; Wang, Dezhi; Li, Gang; Zhao, Daoxiang; Bao-jun, Cui; Fan, Zhen; Fan, Xupeng; Zhang, Haitao; Gan, Tenghai; Xing, Hao; Zhao, Linda; Liu, Changwei

doi:10.1016/j.cej.2022.139647

Cited by 16 publications

(10 citation statements)

References 58 publications

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“…Recently, Xu and coworkers have fabricated a sensitive pressure sensor with scorpion pectine – like microstructures by wrapping silver nanoparticles (AgNPs) in polyimide (PI) aerogels. 56 The hybrid aerogels possessed excellent sensing performance and a wide temperature range, which allowed stable operation under extreme conditions. Despite the excellent properties of PI that allow for a wider range of applications, the high price severely limits their large-scale manufacture.…”

Section: Materials Composition Design In Iwdsmentioning

confidence: 99%

Recent advances in the material design for intelligent wearable devices

Ye³

et al. 2023

Mater. Chem. Front.

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Section: Materials Composition Design In Iwdsmentioning

confidence: 99%

Recent advances in the material design for intelligent wearable devices

Ye³

et al. 2023

Mater. Chem. Front.

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“…In addition to the artificially designed microstructures, natural microstructures are also imitated for the design of high-performance flexible pressure sensors. – For instance, Xu developed a flexible sensor with a biomimetic rose-shaped micro dome structure for healthcare monitoring, demonstrating a high sensitivity of 1.104 kPa –1 and an ultralow detection limit of 0.64 Pa . Xu fabricated a scorpion pectine-like SPM polyimide hybrid aerogel pressure sensor, which showed an ultrahigh sensitivity of 6.9 kPa –1 . Besides, combining multiple different forms of microstructures into hybrid structures can further enrich and improve the performance of flexible pressure sensors.…”

Section: Introductionmentioning

confidence: 99%

“…22−24 For instance, Xu developed a flexible sensor with a biomimetic rose-shaped micro dome structure for healthcare monitoring, demonstrating a high sensitivity of 1.104 kPa −1 and an ultralow detection limit of 0.64 Pa. 25 Xu fabricated a scorpion pectine-like SPM polyimide hybrid aerogel pressure sensor, which showed an ultrahigh sensitivity of 6.9 kPa −1 . 26 improve the performance of flexible pressure sensors. For example, Lei presented a multifunctional intelligent skin with a hybrid structure composed of hemispherical array structure and microchannel structure.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Flexible Pressure Sensors with Hybrid Microstructures Similar to Volcano Sponge

Zhao,

Lei,

Zeng

et al. 2023

ACS Appl. Mater. Interfaces

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Preparing hybrid microstructures on flexible substrates is a crucial approach to achieving highly sensitive flexible pressure sensors. However, the preparation of hybrid microstructures on soft materials often faces complex, time-consuming, and costly problems, which hampers the advancement of highly sensitive flexible sensors. Herein, based on a 3D-printing template and a household microwave oven, a simple, green, and one-step microwave irradiation process using glucose porogen is applied to develop a flexible pressure sensor with a volcano-sponge-like porous dome structure based on porous polydimethylsiloxane (PDMS). Due to the easily deformable porous dome on the porous PDMS substrate, the flexible pressure sensor showcases exceptional sensitivity of 611.85 kPa −1 in 0−1 and 50.31 kPa −1 over a wide range of 20−80 kPa. Additionally, the sensor takes only 43 ms to respond, 123 ms to recover, and presents excellent stability (>1100 cycles). In application testing, the sensor effectively captures pulse signals, speech signals, tactile signals from a mechanical gripper, and gesture signals, demonstrating its potential applications in medical diagnosis and robotics. In conclusion, the microwave irradiation method based on template and glucose porogen provides a new way for the simple, low-cost, and green preparation of porous-surface hybrid microstructures on polymers and high-performance flexible pressure sensors.

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“…It demonstrates exceptional thermal stability, high specific surface aera, inadequate thermal conductivity, low density, and outstanding mechanical properties. [19][20][21][43][44][45][46] Poly(amic acid) (PAA), which serves as the precursor of PI is typically synthesized using solvents with high boiling points and is unsuitable for employment in freeze-drying techniques. 22,23 Poly(amic acid) ammonium salt (PAS) can be dissolved in an aqueous solution and form a gel when complexed with triethylamine (TEA) in the presence of PAA.…”

Section: Introductionmentioning

confidence: 99%

“…[24][25][26][27] PI exhibits exceptional electrical insulating properties. The prevalent technique employed to confer electrical conductivity to PI involves the doping of conductive materials such as metals, 20 graphene, 28 and carbon nanotubes, 29 among others. Graphene is a highly promising nano material that possesses exceptional electrical conductivity, superior thermal properties, and remarkable mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

Preparation of robust and light‐weight anisotropic polyimide/graphene composite aerogels for strain sensors

Zheng,

Jiang,

Chang

et al. 2023

Polymers for Advanced Techs

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This study reports the fabrication of a serious of anisotropic composite aerogels comprising polyimide and graphene (PI/G) through a simple and eco‐friendly technique. Poly(amic acid) ammonium salt/graphene dispersion, which was produced through the mixture of poly(amic acid), graphene aqueous dispersion, triethylamine, and water, was utilized in the process of creating PI/G composite aerogels employing unidirectional freezing, freeze‐drying, and thermal imidization. The PI/G aerogels displayed anisotropic mechanical properties, thermal insulation, and electrical conductivity. The PI/G aerogels with an anisotropic microstructure demonstrated notable rigidity and a high compressive modulus (52.7 MPa) along the axial direction, while displaying favorable flexibility and a low modulus (18.2 MPa) along the radial direction. Furthermore, the PI/G aerogel exhibited anisotropic thermal conductivity (axial: 64 mW m−1 K−1; radical: 55 mW m−1 K−1). These properties enable the PI/G aerogel to have a wider range of potential applications, especially strain sensors. The research presented herein establishes a simple and eco‐friendly strategy for the production of anisotropic PI/G‐based composite aerogels.

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Ultralight and flexible silver nanoparticle-wrapped “scorpion pectine-like” polyimide hybrid aerogels as sensitive pressor sensors with wide temperature range and consistent conductivity response

Cited by 16 publications

References 58 publications

Recent advances in the material design for intelligent wearable devices

Recent advances in the material design for intelligent wearable devices

Highly Sensitive Flexible Pressure Sensors with Hybrid Microstructures Similar to Volcano Sponge

Preparation of robust and light‐weight anisotropic polyimide/graphene composite aerogels for strain sensors

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