Superior piezoresistive strain sensing behaviors of carbon nanotubes in one-dimensional polymer fiber structure

Yu, Senlong; Wang, Xingping; Xiang, Hengxue; Zhu, Liping; Tebyetekerwa, Mike

doi:10.1016/j.carbon.2018.08.028

Cited by 111 publications

(79 citation statements)

References 42 publications

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“…Therefore, all of the SCGFs present good tensile mechanical properties and the elongation at break are all more than 700%, which meets the tensile performance requirements of strain sensors under large deformation. Moreover, the mechanical property of SBS/ 0.5C/2.5G is better than SBS/3CNT and SBS/3FLG [14,15], which could be attributed to a synergistic effect between one-dimensional CNTs and two-dimensional FLG at this ratio, promoting uniform dispersion in the polymer matrix.…”

Section: Mechanical Behaviors Of Scgfsmentioning

confidence: 93%

“…The SBS/CNTs/FLG composite fibers (SCGFs) were fabricated by a facile and scalable wet-spinning process [14,15]. First, a certain proportion of CNTs and FLGs were added into tetrahydrofuran solution for a further ultrasonic of 4 h in a 20°C water bath to obtain a dispersed mixed solution.…”

Section: Preparation Of Sbs/cnts/flg Composite Fibersmentioning

confidence: 99%

“…The changes in fiber resistance were measured under different tensile strain rates, tensile strain amplitudes and tensile cycles. The specific operation was described according to our previous work [14,15].…”

Section: Characterizationmentioning

confidence: 99%

“…In most cases, the deterioration of durability is relevant to the irreversible deformation of the flexible matrix, the fracture of conductive network and weak interaction between polymer and conductive fillers [11][12][13]. Aiming at the problems above, we recently prepared strain sensors based on poly(styrene-butadiene-styrene) (SBS)/carbon nanotubes (CNTs) and SBS/few-layer graphene (FLG) conductive fibers, which possessed large deformation, high sensitivity and good cycle stability under small deformation (<50%) [14,15]. Unfortunately, the dynamic stabilities of these hybrid conductive fibers is low under large deformation (>100%), which limited their application in the fields of human motion detection and smart wearable devices.…”

Section: Introductionmentioning

confidence: 99%

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1-D polymer ternary composites: Understanding materials interaction, percolation behaviors and mechanism toward ultra-high stretchable and super-sensitive strain sensors

Wang

Tebyetekerwa

2019

Sci. China Mater.

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A series of 1-D polymer ternary composites based on poly(styrene-butadiene-styrene) (SBS)/carbon nanotubes (CNTs)/few-layer graphene (FLG) conductive fibers (SCGFs)were prepared via wet-spinning. Employed as ultra-high stretchable and super-sensitive strain sensors, the ternary composite fiber materials' interaction, percolation behaviors and mechanism were systematically explored. The resultant SCGFs-based strain sensors simultaneously exhibited high sensitivity, superior stretchability (with a gauge factor of 5,467 under 600% deformation) and excellent durability under different test conditions due to excellent flexibility of SBS, the synergistic effect of hybrid conductive nanofibers and the strong π-π interaction. Besides, the conductive networks in SBS matrix were greatly affected by the mass ratio of CNTs and FLG, and thus the piezoresistive performances of the strain sensors could be controlled by changing the content of hybrid conductive fillers. Especially, the SCGFs with 0.30 wt.% CNTs (equal to their percolation threshold 0.30 wt.%) and 2.7 wt.% FLG demonstrated the highest sensitivity owing to the bridge effect of FLG between adjacent CNTs. Whereas, the SCGFs with 1.0 wt.% CNTs (higher than their percolation threshold) and 2.0 wt.% FLG showed the maximum strain detection range (600%) due to the welding connection caused by FLG between the contiguous CNTs. To evaluate the fabricated sensors, the tensile and the cyclic mechanical recovery properties of SCGFs were tested and analyzed. Additionally, a theoretical piezoresistive mechanism of the ternary composite fiber was investigated by the evolution of conductive networks according to tunneling theory.

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Section: Mechanical Behaviors Of Scgfsmentioning

confidence: 93%

Section: Preparation Of Sbs/cnts/flg Composite Fibersmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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1-D polymer ternary composites: Understanding materials interaction, percolation behaviors and mechanism toward ultra-high stretchable and super-sensitive strain sensors

Wang

Tebyetekerwa

2019

Sci. China Mater.

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“…However, it is quite challenging to simultaneously achieve these properties by using the aforementioned traditional mixing methods. Therefore, several strategies, such as using 3D carbon fillers, hybrid fillers, constructing segregated network structures, 3D printing have been proposed to overcome these challenges. For instance, Ke et al reported a thermoplastic polyurethane (TPU) composite with balanced properties by using hybrid fillers of branched carbon nanotubes (CNS) and graphene nanoplatelets (GNP) reaching a gauge factor ( G F ) of 144 at strain of 50%, four times that of the control nanocomposites with only CNS.…”

Section: Introductionmentioning

confidence: 99%

Effect of Solvent on Segregated Network Morphology in Elastomer Composites for Tunable Piezoresistivity

Sang

Guo

et al. 2019

Macro Materials & Eng

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Flexible, light‐weight, and wearable electronics have significant potential for the development of Internet of Things. Flexible sensors with tunable piezoresistive properties are in high demand for various practical applications. Herein, different morphology thermoplastic polyurethane (TPU)/ carbon nanostructure (CNS) composites with segregated network are obtained by swelling the TPU powders using various solvents. The better solvent for TPU, dimethylformamide (DMF), renders the composites with 0.7 wt% CNS stronger polymer‐filler interactions, resulting in significantly improved piezoresistive sensitivity at strain larger than 150%. Also the gauge factors (GFs) for these composites are 9.7 in the range 0–60% strain and 19.3 for 60–100% strain. In contrast, the composites with ethanol (EtOH) and tetrahydrofuran (THF) which swell less the TPU show delayed increase in piezoresistivity and GFs of 2.2 and 3.5 for strain up to 100%, respectively, suggesting potential applications for stretchable conductors.

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Fabrication of Conductive Polymer Composites and Their Applications in Sensors

Gao

2021

Polymer Nanocomposite Materials

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Superior piezoresistive strain sensing behaviors of carbon nanotubes in one-dimensional polymer fiber structure

Cited by 111 publications

References 42 publications

1-D polymer ternary composites: Understanding materials interaction, percolation behaviors and mechanism toward ultra-high stretchable and super-sensitive strain sensors

1-D polymer ternary composites: Understanding materials interaction, percolation behaviors and mechanism toward ultra-high stretchable and super-sensitive strain sensors

Effect of Solvent on Segregated Network Morphology in Elastomer Composites for Tunable Piezoresistivity

Fabrication of Conductive Polymer Composites and Their Applications in Sensors

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