Facile and Large-scale Fabrication of Self-crimping Elastic Fibers for Large Strain Sensors

Yu, Jinchao; Chen, Kang; Ji, Hong; Zhang, Yang; Zhang, Yumei; Pan, Zhijuan

doi:10.1007/s10118-021-2560-1

Cited by 7 publications

(6 citation statements)

References 40 publications

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“…to the test, the mattress had to be kept at room temperature of 2 for 24 h. (2) Multilevel firmness of the mattress After 24 h in place, the mattress samples were tested on a u chine (AG-X20KN) using a 100 mm diameter cylindrical indente 250 N at a constant speed of 100 mm min −1 . Based on the load-de from the tests, the approximate modulus calculation method wa multilevel firmness of the mattress [17]: surface firmness (𝐷 Firmness rating: a number (1 decimal) from 1 to 10 characterizes the degree of firmness of the mattress, from firm to soft, as calculated in Equations ( 4) and (5) [33].…”

Section: Testing Of Mattress Firmnessmentioning

confidence: 99%

“…In addition, TPEE has excellent durability, heat resistance, and light weight [ 3 ]. Due to its multi-functional versatility, TPEE is widely used in automotive, electronic, transportation, and medical devices, such as shock-absorbing pads for high-speed railway tracks, hydraulic hoses, and artificial heart valves, making it an ideal material for multi-cycle load application conditions [ 4 , 5 , 6 , 7 ]. Among them, the three-dimensional TPEE fibrous material (abbreviated as T 3D F) formed by the random arrangement of TPEE fibers in a loop connection has also brought innovation to the mattress industry (Beathair ® by Toyobo (Osaka, Japan), airfiber ® by Airweave (Tokyo, Japan); fullair ® by Keyi (Wuxi, China)) ( Figure 2 ).…”

Section: Introductionmentioning

confidence: 99%

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Compression Property of TPEE-3D Fibrous Material and Its Application in Mattress Structural Layer

Fang,

Shen

2023

Polymers

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Thermoplastic poly(ether/ester) elastomer (TPEE) has great potential as a mattress material due to its high resilience, breathability, and light weight. This study aimed to evaluate the feasibility of TPEE-3D fibrous material (T3DF), a three-dimensional block material made of TPEE fibers randomly aligned and loop-connected, for mattress application. After testing the compression properties of T3DF, the effects of T3DF structural layers on mattress firmness were investigated. The results showed that T3DF had good energy absorption capacity, broad indentation hardness range (126.94–333.82 N), and high compression deflection coefficient (2.79–4.39). The thickness and density of T3DF were the main factors influencing mattress firmness, and the impact of thickness was more significant (p < 0.05). Owing to the hard and soft segments contained in TPEE, T3DF could be used for both the padding and core layers of the mattress. The hardness value and Dsurface of the mattress with a T3DF padding layer increased with T3DF density but decreased with T3DF thickness. Moreover, the hardness value and Dsurface of the mattress with a T3DF core layer increased with T3DF density, while with T3DF thickness, its Dsurface increased and Dbottom decreased. Therefore, the thick and low-density T3DF padding layer could improve the comfort of the mattress surface, a thin T3DF core layer could satisfy both the softer surface and the firmer bottom of the mattress.

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Section: Testing Of Mattress Firmnessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compression Property of TPEE-3D Fibrous Material and Its Application in Mattress Structural Layer

Fang,

Shen

2023

Polymers

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“…[1] Textile strain sensors are multifunctional and capable or buckling structure design. [4,8,28,[38][39][40][41][42] LM-filled hollow fibers could sense up to 140% strain with a GF of 3.4, and they were stable under 3500 stretching cycles at 70% strain. [32,33] Conductive melt-or wet-spun composite fiber sensors were reported to sense up to 100% strain with a high GF of 2800, lasting for 100 stretching cycles.…”

Section: Introductionmentioning

confidence: 99%

“…They could have a sensing strain range of up to 20-200%, a GF from -0.76 to 13 920, and a stable sensitivity from 1000 to 4500 cycles at 10% strain. Buckling or twisting created in fibers or yarns, via texturing conductive fibers, [38] wrapping metal wire into a helix, [39] self-crimping by bicomponent melt-spinning, [40] and winding conductive fibers onto elastane fibers or yarns, [4,8,28,41,42] imparts different sensing mechanisms to linear textile strain sensors. For example, single-and doublecovered yarn sensors with a "compression spring" architecture demonstrated a large sensing range of up to 300%, GFs of 10 at 1% strain and 3.7 at 50% strain, and excellent cyclic stability for 2000-400 000 cycles.…”

Section: Introductionmentioning

confidence: 99%

“…[ 11,30,31 ] Linear resistive strain sensors are based on conductive fibers or yarns, manufactured by using liquid metal (LM) injection, [ 32,33 ] melt‐spinning, [ 34 ] wet‐spinning, [ 18,23,25 ] coating techniques, [ 10,19,20,26,35–37 ] twisting or buckling structure design. [ 4,8,28,38–42 ] LM‐filled hollow fibers could sense up to 140% strain with a GF of 3.4, and they were stable under 3500 stretching cycles at 70% strain. [ 32,33 ] Conductive melt‐ or wet‐spun composite fiber sensors were reported to sense up to 100% strain with a high GF of 2800, lasting for 100 stretching cycles.…”

Section: Introductionmentioning

confidence: 99%

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A Scalable Durable and Seamlessly Integrated Knitted Fabric Strain Sensor for Human Motion Tracking

Zhou

Shen

Yan-pin

et al. 2022

Adv Materials Technologies

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of detecting various physiological signals and motions. They are integrated into or attached to apparel via knitting, [2] embroidery, [3] and pasting [4] to provide a longterm and stable detection of tiny to large deformations without sacrificing comfort and freedom of motion, and thus have great potential in personal health care, [5] sports, [6] rehabilitation, [7] robotics, [8,9] etc. Textile strain sensors are stretchable and sensitive to tiny deformations. Integrating them into apparel while avoiding deformation to maintain sensor accuracy is crucial for practical applications. A textile strain sensor that can be seamlessly integrated into apparel under precise tension is desired.Textile strain sensors are categorized as resistive, [10] capacitive, [11] piezoelectric, [12] triboelectric, [13] and optical. [14] Resistivity is the most adopted strategy due to its facile fabrication and use. [15] The key to developing textile resistive strain sensors is to choose the right materials, assembled structures, and fabrication methods. [16] Textile resistive strain sensors typically consist of conductive materials and stretchable supporting substrates. [17] The conductive materials include carbon nanotubes (CNTs), [18,19] reduced graphene oxide (rGO), [4,8,20] carbon black (CB), [21] conductive polymers (e.g., polypyrrole (PPY), poly(3,4-ethylenedioxythiop hene):poly(styrenesulfonate) (PEDOT:PSS)), [22,23] metal nanoparticles and nanowires. [24,25] The stretchable supporting materials are normally Ecoflex, [26] polydimethylsiloxane (PDMS), [24] polyurethane (PU), [8,18,27] and rubber. [28] Textile resistive strain sensors detect strains by contacting and separating conductive particles, fibers, or yarns to adjust the resistivity. The principles include geometrical transformations, changes in the conductive network, and the formation of cracks or wrinkle microstructures. [29] Textile resistive strain sensors are evaluated in terms of gauge factor (GF), reliable strain range, and stretching cycles. [29] Textile conductivity can be realized in all three textile processes, i.e., fiber spinning, yarn spinning or covering, and fabric forming. Current textile strain sensors are linear, planar, or three-dimensional (3D), among which 3D fabric strain sensors are thicker and heavier, and are hard to integrate into apparel to achieve wearing comfort. [11,30,31] Linear resistive strain sensors are based on conductive fibers or yarns, manufactured by using liquid metal (LM) injection, [32,33] melt-spinning, [34] wet-spinning, [18,23,25] coating techniques, [10,19,20,26,[35][36][37] twisting Textile strain sensors capable of monitoring human physiological signals and activities have great potential in health monitoring and sports. Integrating them into apparel to be wearable, repeatable, and sensitive remains a great challenge, impeding their practical applications. This paper reports a fabric strain sensor that can be seamlessly integrated into various apparel under precise tension through industrial-scale production. A conductive...

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Stabilize and Reinforce Hydrogen-Bonded Polymer Complex Elastic Fiber by Catechol Chemistry and Coordination

Liu

Zhang

et al. 2023

Chin J Polym Sci

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Facile and Large-scale Fabrication of Self-crimping Elastic Fibers for Large Strain Sensors

Cited by 7 publications

References 40 publications

Compression Property of TPEE-3D Fibrous Material and Its Application in Mattress Structural Layer

Compression Property of TPEE-3D Fibrous Material and Its Application in Mattress Structural Layer

A Scalable Durable and Seamlessly Integrated Knitted Fabric Strain Sensor for Human Motion Tracking

Stabilize and Reinforce Hydrogen-Bonded Polymer Complex Elastic Fiber by Catechol Chemistry and Coordination

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