Flexible strain sensor for air muscles using polypyrrole coated rubber

Tjahyono, Arief P.; Aw, Kean C.; Travaš-Sejdić, Jadranka; Li, K. C.

doi:10.1117/12.847440

Cited by 7 publications

(2 citation statements)

References 11 publications

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“…An alternative to textile is rubber. A previous study of using butyl rubber as the substrate was reported and it was a proof of concept that this approach is viable [15]. However the lack of resilience of the butyl rubber causes large hysteresis in the sensor's output and with repeatability problems hinders its applications in the real world.…”

Section: Introductionmentioning

confidence: 96%

Polypyrrole coated rubber as flexible strain sensor for large strain measurement

Tjahyono

Travaš-Sejdić

2012

SPIE Proceedings

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A novel flexible strain sensor was developed using a conducting polymer coated on rubber for large strain measurements. A coating of the conducting polymer, polypyrrole, was deposited on a strip of natural rubber through the process of vapour phase polymerisation while the rubber is in a stretched state. This process involves depositing a layer of oxidant on the rubber surface, followed by exposure to pyrrole monomer vapours that polymerize on the oxidantcoated rubber to produce polypyrrole.The change in electrical resistance of the strain sensor was recorded while cyclic strain from 0% to 20% was exerted on it. The gauge factor of the strain sensor was calculated to be 1.86. From repeated electrical resistance-strain measurements, the repeatability of the strain sensor was studied. A hysteresis was observed in a single extensionretraction strain cycle. Further study showed that the observed hysteresis is dependent on the strain rate where lower strain rate resulted in higher hysteresis and vice versa for a higher strain rate. There is also an electrical resistance drift between consecutive extension-retraction cycles.Owing to the flexibility of the rubber, the strain sensor can be used in complex configurations. The strain sensor can also be mounted or attached directly on surfaces to provide low-profile installation where space constraint is an issue. These characteristics offer advantages over traditional strain sensors to be used in applications that were not previously possible.Polypyrrole, Strain Sensor, Natural Rubber, Vapour Phase Polymerisation INTRODUCTIONIntrinsically conducting polymers (ICPs) are a type of smart materials where polymers have the capability to conduct electricity. The discovery of ICPs can be found in literatures dated back to 1862 [1] and as of today numerous types of polymers have been identified as ICPs. ICPs are one of the most sought after smart materials due to its excellent properties where the mechanical properties of polymers are combined with the ability to conduct electricity. Furthermore, the polymers can be tailored to suit a particular role or application by modifying the functional branches of the polymer [2]. Polypyrrole (PPy) is one of the ICPs that have been extensively studied as both actuators and sensors due to its high conductivity, good stability and ease of synthesis using either chemical or electrochemical polymerisation. PPy has been used for various applications that include artificial muscle [3], novel drug delivery system [4],[5], heat generation [6], EMI shielding [7], gas sensor [8][9] and strain sensor [10],[11].

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Section: Introductionmentioning

confidence: 96%

Polypyrrole coated rubber as flexible strain sensor for large strain measurement

Tjahyono

Travaš-Sejdić

2012

SPIE Proceedings

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“…In recent research, the study of large-scale strain sensor mainly focuses on the sensor based on flexible materials and fiber Bragg grating (FBG). To our knowledge, the flexible large-scale strain sensors take the high cost [3,4] and the commercial fiber Bragg grating (FBG) strain sensor has a sensing limit of 9000µε (0.9%) [5]. In addition, the MEMS capacitive strain sensors have some disadvantages such as the parasitic capacitance, weak output signal, temperature drift and nonlinear influence [6,7], which limit its practical application.…”

Section: Introductionmentioning

confidence: 99%

Development and Property Investigation of a Large-Scale Strain Sensor by Grating Moiré Fringe Method

Duan

Jiang

Chen

et al. 2013

AMR

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A large-scale strain sensor for measuring the strain between 0~0.2ε has been developed using grating moiré fringe in this work. The gallium arsenide near-infrared solid-state light-emitting diode was used for light source of the sensor, and photodiode array sensor was chosen for the photodetector. The signal received was converted into digital pulses for the output by the signal processing system and displayed. The results indicated that the fabricated large-scale strain sensor showed the good linearity and repeatability, and low hysteresis. Strain sensitivity of 620ε-1 and a minimum strain of 0.004 ε can be achieved.

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Flexible Fabric Strain Sensors

2015

Handbook of Smart Textiles

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Flexible strain sensor for air muscles using polypyrrole coated rubber

Cited by 7 publications

References 11 publications

Polypyrrole coated rubber as flexible strain sensor for large strain measurement

Polypyrrole coated rubber as flexible strain sensor for large strain measurement

Development and Property Investigation of a Large-Scale Strain Sensor by Grating Moiré Fringe Method

Flexible Fabric Strain Sensors

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