A silanized MCNT/TPU-based flexible strain sensor with high stretchability for deformation monitoring of elastomeric isolators for bridges

Xu, Xiaoxing; Yuan, Yong J.; Zhang, Tong; Li, Kun; Wang, Siqi; Liang, Changhao; Zhu, Hongxia

doi:10.1016/j.conbuildmat.2022.127664

Cited by 8 publications

(6 citation statements)

References 30 publications

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“…Figure 8B demonstrates the trend of the maximum GF and maximum monitoring range of the composites. The MWCNT‐NSD 5 /VMQ composites had the lowest maximum monitored strain (

ε

= 48%), and with increasing NSD content, the MWCNT‐NSD 20 /VMQ composites reached a range of monitored strains of

ε

= 180%, which satisfies the strain monitoring range of seismic isolation bearings 28 . In addition, the maximum resistance of the MWCNT‐NSD 5 /VMQ composite rises from (

∆ R / R_{0}

= 127) to MWCNT‐NSD 15 /VMQ (

∆ R / R_{0}

= 17,555), which indicates that the damage to the conductive network of the composites is more severe and contributes to the higher GF.…”

Section: Resultsmentioning

confidence: 63%

“…The MWCNT-NSD 5 /VMQ composites had the lowest maximum monitored strain (ε = 48%), and with increasing NSD content, the MWCNT-NSD 20 / VMQ composites reached a range of monitored strains of ε = 180%, which satisfies the strain monitoring range of seismic isolation bearings. 28 In addition, the maximum resistance of the MWCNT-NSD 5 /VMQ composite rises from (ΔR=R 0 = 127) to MWCNT-NSD 15 /VMQ (ΔR=R 0 = 17,555), which indicates that the damage to the conductive network of the composites is more severe and contributes to the higher GF. However, the maximum resistance of MWCNT-NSD 20 /VMQ composites decreases with a further increase in NSD content, which is attributed to the increase in the continuity between MWCNTs and NSD in the VMQ matrix, and the conductive network is more tightly packed, leading to a decrease in the maximum resistance of the composites.…”

Section: Strain Sensing Behaviors and Interface Effect Of Mwcnt-nsd/v...mentioning

confidence: 98%

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Improving the stability of multiwalled carbon nanotube/silicone rubber composites strain sensors by nanosilica

Wan,

Yang,

Zhao

2024

Polymer Composites

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Conductive polymer composites use elastomers as a matrix for strain sensors. However, elastic polymer composites usually exhibit shoulder peak effects in their resistance response signals, limiting their applicability as strain sensors. In this study, we modified multiwalled carbon nanotubes (MWCNTs)/methyl vinyl silicone rubber (VMQ) by incorporating nanosilica (NSD) to eliminate the shoulder peak effect. The results showed that the addition of a suitable amount of NSD can improve the reconstruction of the conductive network of composite material and eliminated the shoulder peak effect of the composite material in the resistive response signal. The mechanism of eliminating the shoulder peak effect was elucidated, while the mechanical properties of the composite material were improved, which endowed the composite material with excellent strain sensing properties, including sensitivity (GF = 127) and response time (270 ms), and maintained excellent stability and recovery even in 15,000 cycles. These findings highlight the potential of our strain sensor for the real‐time strain monitoring of large‐deformation isolation bearings.Highlights NSD eliminates shoulder peak effect in MWCNT/VMQ composites. Explained the shoulder peak effect elimination mechanism. NSD enhanced mechanical properties of MWCNT/VMQ composites. MWCNT‐NSD20/VMQ composites have stable resistive strain response properties.

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“…Figure 8B demonstrates the trend of the maximum GF and maximum monitoring range of the composites. The MWCNT‐NSD 5 /VMQ composites had the lowest maximum monitored strain (

ε

= 48%), and with increasing NSD content, the MWCNT‐NSD 20 /VMQ composites reached a range of monitored strains of

ε

= 180%, which satisfies the strain monitoring range of seismic isolation bearings 28 . In addition, the maximum resistance of the MWCNT‐NSD 5 /VMQ composite rises from (

∆ R / R_{0}

= 127) to MWCNT‐NSD 15 /VMQ (

∆ R / R_{0}

= 17,555), which indicates that the damage to the conductive network of the composites is more severe and contributes to the higher GF.…”

Section: Resultsmentioning

confidence: 63%

Section: Strain Sensing Behaviors and Interface Effect Of Mwcnt-nsd/v...mentioning

confidence: 98%

Improving the stability of multiwalled carbon nanotube/silicone rubber composites strain sensors by nanosilica

Wan,

Yang,

Zhao

2024

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…The commercial silicone elastomer Ecoflex has a very low Young's modulus and is used mostly for ultrastretchable sensors [46][47][48]. Thermoplastic polyurethane (TPU) is also a common flexible matrix used for stretchable sensors due to its alternating hard and flexible segments that allow high durability and high filler content [49]. Meanwhile, for the wearable application, the biocompatibility of the materials with the human body is vital.…”

Section: Polymeric Substrates In Flexible Strain Sensorsmentioning

confidence: 99%

Key factors and performance criteria of wearable strain sensors based on polymer nanocomposites

Zhagiparova¹,

Kalimuldina²,

Diaby³

et al. 2023

Nano Futures

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Recently, there has been a growing demand for wearable electronic devices/strain sensors in soft robotics body-health monitoring, human-machine interfaces and human motion detection. Wearable strain sensors feature fast and multi-stimuli sensitivity, high flexibility, ultra-stretchability and biocompatibility. Although the progress in flexible strain sensors is exponential, the production of wearable sensors undergoes several challenges, such as reliability and reproducibility. An in-depth understanding of the sensing mechanism of the flexible strain sensors based-polymeric nanocomposites is needed to fabricate reliable and reproducible sensors and move from the prototype phase into the industry phase. In this review, types of strain sensors and key parameters such as linearity, gauge factor (sensitivity), hysteresis and durability are explained in the context of the recently published work. In addition, current challenges and perspectives in relation to the wearable strain sensors are delineated.

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“…29,30 The presence of KH550 triggers the cross-linking entanglement between SBR and TPU, which reduces the formation opportunity of sulfur cross-linking between molecules to a large extent and therefore avoids the possible aggregation of SBR in the matrix. 31…”

Section: Ftir Spectramentioning

confidence: 99%

The flexible stab‐resistant composite membrane made by thermoplastic polyurethane filled with modified nanoparticles

Sun,

Ji,

Zhang

et al. 2023

J of Applied Polymer Sci

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Thermoplastic polyurethane (TPU) has good elasticity and tear resistance, and is often applied in the field of flexible puncture resistance although the puncture resistance of pure TPU is limited. In this paper, silica powder (SiO2) and styrene butadiene rubber powder (SBR) with different concentrations were used as fillers to reinforce the TPU matrix respectively. To overcome the problem of poor interfacial compatibility between filler and matrix, the silane coupling agent r‐Aminopropyltrieth oxysilanee (KH550) was selected to modify the particles. The compatibility of particles and matrix, the puncture properties and tensile properties of composites were assessed by FTIR, TEM, SEM, tensile testing, and needle puncture testing. Further, the tensile and puncture properties of composites with different types and concentrations of particles were systematically compared and analyzed to find optimal parameters. The results show that the best modification effect is gained when the mass ratio of KH550 and nanoparticles is 0.85:1 and the specific puncture strength of TPU membranes incorporated modified SiO2 or SBR nanoparticles can be increased by up to 106.4% and 85% respectively compared to pure TPU membrane.

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A silanized MCNT/TPU-based flexible strain sensor with high stretchability for deformation monitoring of elastomeric isolators for bridges

Cited by 8 publications

References 30 publications

Improving the stability of multiwalled carbon nanotube/silicone rubber composites strain sensors by nanosilica

Improving the stability of multiwalled carbon nanotube/silicone rubber composites strain sensors by nanosilica

Key factors and performance criteria of wearable strain sensors based on polymer nanocomposites

The flexible stab‐resistant composite membrane made by thermoplastic polyurethane filled with modified nanoparticles

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