Flexible and highly pressure-sensitive ternary composites-wrapped polydimethylsiloxane sponge based on synergy of multi-dimensional components

Zhao, Xiuhua; Meng, Fanwei; Peng, Yitian

doi:10.1016/j.compositesb.2021.109466

Cited by 27 publications

(10 citation statements)

References 51 publications

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“…The sensing performance was evaluated via the GF, which was numerically equal to the slope of the relative resistance change (ΔR/R 0 ) to the corresponding strain (ε). 48 As shown in Figure 5c, the GF of the conductive sponge was ca. 0.1705 for strain ranging from 1 to 12% (corresponding to 0−0.03 MPa) due to air-filled pore compression in the sponge.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Interestingly, the sponge sensor could quickly respond to the applied pressure after the starting point (the inset in Figure b). The sensing performance was evaluated via the GF, which was numerically equal to the slope of the relative resistance change (Δ R / R 0 ) to the corresponding strain (ε) . As shown in Figure c, the GF of the conductive sponge was ca.…”

Section: Resultsmentioning

confidence: 99%

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Highly Dispersed, Adhesive Carbon Nanotube Ink for Strain and Pressure Sensors

Duan

Lan

2022

ACS Appl. Mater. Interfaces

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Carbon nanotubes (CNT) with prominent electrical and mechanical properties are ideal candidates for flexible wearable devices. However, their poor dispersity in solvents greatly limits their applications as a conductive ink in the fabrication of wearable sensors. Herein, we demonstrate a kind of CNT-based conductive dispersion with high dispersity and adhesiveness using cellulose derivatives as the solvent, in which γ-aminopropyl triethoxy silane as a cross-linking agent reacts with cellulose to form copolymer networks, and simultaneously it also acts as an initiator to induce the self-polymerization of dopamine. Based on the conductive CNT ink, we also demonstrated textile-based strain sensors by stencil printing and sponge-based pressure sensors by the dipping method. The textile-based strain sensors could respond to external stimuli promptly. Then, the strain sensors were encapsulated via polydimethylsiloxane with the expansion of working ranges from less than 20 to nearly 70%. The encapsulated textile sensors exhibited excellent sensing performance as wearable strain sensors to monitor human motions including smile, throat vibration, finger folding, wrist bending, and elbow twisting. The sponge sensors hold high sensitivity and excellent durability as well. The conductive CNT-based ink provides an alternative idea in the development of flexible wearable devices.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Highly Dispersed, Adhesive Carbon Nanotube Ink for Strain and Pressure Sensors

Duan

Lan

2022

ACS Appl. Mater. Interfaces

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“…The synergy effect of components with different dimensions may be effective for developing flexible piezoresistive sensors with high sensitivity and a wide linear sensing range. 24 Therefore, to improve the sensitivity of the MNWF-based pressure sensor, a ''brick-mortar'' hierarchical structure (MNWF as ''bricks'' and 0D metal NPs as ''mortar) was constructed by introducing metal NPs and forming 0D/2D composites with MXene. Noble metal NPs are ideal conductive nanomaterials for preparing flexible pressure sensors owing to their high electrical conductivity, plasmonic effect, and good antibacterial activity.…”

Section: Sensing Performancementioning

confidence: 99%

“…In addition, multidimensional conductive nanomaterials with various structures and properties, such as zero-dimensional (0D) nanoparticles (NPs), one-dimensional (1D) nanowires, and two-dimensional (2D) nanosheets, have been used to optimize the performance of sensing components and achieve high sensitivity. 23,24 Although considerable progress has been made toward improving sensor performance, device versatility is also required to adapt to more complex applications, which remains a major research challenge.…”

Section: Introductionmentioning

confidence: 99%

A general strategy to immobilize metal nanoparticles on MXene composite fabrics for enhanced sensing performance and endowed multifunctionality

Pan

et al. 2022

J. Mater. Chem. C

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“…The sensing characteristics of flexible piezoresistive sensors can be further optimized by applying composite conductive nanomaterials into the sensing units to exert their synergistic effect. For instance, using Ag-CNTs-rGO nanocomposites, a flexible piezoresistive sensor with 33 kPa –1 sensitivity was realized . Ma proposed a pressure sensor based on carbon black/graphene nanosheet composites, which exhibited a 197.56 kPa –1 sensitivity at 0–300 Pa and a 47.60 gauge factor at 50–100% strain .…”

Section: Introductionmentioning

confidence: 99%

High-Performance Porous PDMS-Based Piezoresistive Sensor Prepared by a Modified Microwave Irradiation Process

Zhao

Xiao

et al. 2022

ACS Appl. Electron. Mater.

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The flexible pressure sensor based on a porous structure has excellent sensing performance. It is critical to develop a large-scale and lowcost manufacturing method for realizing high-performance flexible sensors with porous structures. Herein, a porous polydimethylsiloxane (PDMS) was prepared by a modified microwave irradiation process, and an ultrahigh sensitive flexible piezoresistive sensor with wide sensing range was obtained by coating carbon nanotubes (CNTs)/graphene on the porous PDMS surface. Due to the uniform macroporous structure in PDMS and the synergistic conductive effect of graphene and CNTs, the sensitivity of the flexible sensor is up to 300.31 kPa −1 in 0−50 kPa and 52.51 kPa −1 in 50−200 kPa. Moreover, the flexible device has good reversibility, rapid response speed, good stability, and a certain anti-electromagnetic interference ability. The application in the monitoring of physiological signals demonstrates that the porous PDMS-based sensor prepared by the convenient and environmental microwave irradiation process has remarkable ability in monitoring human health. In addition, the modified microwave irradiation method also provides a way for the preparation of porous materials for other applications such as electromagnetic shielding materials.

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Flexible and highly pressure-sensitive ternary composites-wrapped polydimethylsiloxane sponge based on synergy of multi-dimensional components

Cited by 27 publications

References 51 publications

Highly Dispersed, Adhesive Carbon Nanotube Ink for Strain and Pressure Sensors

Highly Dispersed, Adhesive Carbon Nanotube Ink for Strain and Pressure Sensors

A general strategy to immobilize metal nanoparticles on MXene composite fabrics for enhanced sensing performance and endowed multifunctionality

High-Performance Porous PDMS-Based Piezoresistive Sensor Prepared by a Modified Microwave Irradiation Process

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