Coco Stretch: Strain Sensors Based on Natural Coconut Oil and Carbon Black Filled Elastomers

Lugoda, Pasindu; Costa, Júlio C.; García-García, Leonardo A.; Pouryazdan, Arash; Jocys, Zygimantas; Spina, Filippo; Salvage, Jonathan P.; Roggen, Daniel; Münzenrieder, Niko

doi:10.1002/admt.202000780

Cited by 15 publications

(8 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 43–45 ] Carbon black (Nouryon, Ketjenblack EC‐600JD), a type of conductive nanofiller, was infused with the thermoplastic polyurethane to improve the mechanical and electrical characteristics without losing biocompatibility, [ 53 ] although a detailed biocompatibility study was not performed. However, carbon black has already been used for biocompatible strain sensors and flexible bioelectrodes, [ 50,51 ] and the one used in this study showed high cell viability (100%) at a concentration of 32.5 µg mL −1 during an in vitro cytotoxicity study. [ 52 ] Additionally, as there is no evidence that the CSMP composite is nontoxic, an in vitro cytotoxicity test was performed (according to ISO 10993–5:2009 Biological Evaluation of Medical Devices – Part 5).…”

Section: Resultsmentioning

confidence: 99%

A Variable Stiffness Magnetic Catheter Made of a Conductive Phase‐Change Polymer for Minimally Invasive Surgery

Piskarev

Shintake

Chautems

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

Variable stiffness (VS) is an important feature that significantly enhances the dexterity of magnetic catheters used in minimally invasive surgeries. Existing magnetic catheters with VS consist of sensors, heaters, and tubular structures filled with low melting point alloys, which have a large stiffness change ratio but are toxic to humans. In this paper, a VS magnetic catheter is described for minimally invasive surgery; the catheter is based on a novel variable stiffness thread (VST), which is made of a conductive shape memory polymer (CSMP). The CSMP is nontoxic and simultaneously serves as a heater, a temperature sensor, and a VS substrate. The VST is made through a new scalable fabrication process, which consists of a dipping technique that enables the fabrication of threads with the desired electrical resistance and thickness (with a step size of 70 µm). Selective bending of a multisegmented VST catheter with a diameter of 2.0 mm under an external magnetic field of 20 mT is demonstrated. Compared to existing proof-of-concept VS catheters for cardiac ablation, each integrated VST segment has the lowest wall thickness of 0.75 mm and an outer diameter of 2.0 mm. The segment bends up to 51° and exhibits a stiffness change factor of 21.

show abstract

Section: Resultsmentioning

confidence: 99%

A Variable Stiffness Magnetic Catheter Made of a Conductive Phase‐Change Polymer for Minimally Invasive Surgery

Piskarev

Shintake

Chautems

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…Despite the fact that carbon−based polymer sensors have received widespread attention, current research has focused mainly on the manufacture of the device and the sensing behavior [ 11 , 12 , 13 , 14 ] while research on its sensing mechanism is limited. In the initial research, an analogy method was proposed to quantitatively describe the electromechanical behavior of silicone rubber filled with CNPs, but the sensing mechanism was not involved [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Multiscale Analysis of the Highly Stretchable Carbon−Based Polymer Strain Sensor

Wang

Zuo

et al. 2023

Polymers

View full text Add to dashboard Cite

In this paper, a multiscale analysis method was proposed to simulate carbon nanoparticles (CNPs)−filled polymers which can be strain sensors applied in wearable electronic devices, flexible skin, and health monitoring fields. On the basis of the microstructure characteristics of the composite, a microscale representative volume element model of the CNPs−filled polymer was established using the improved nearest−neighbor algorithm. By finite element analysis, the variation of the junction widths of adjacent aggregates can be extracted from the simulation results. Then, according to the conductive mechanism of CNP−filled polymers, the composite was simplified as a circuit network composed of vast random resistors which were determined by the junction widths between adjacent aggregates. Hence, by taking junction widths as the link, the resistance variation of the CNPs−filled polymer with the strain can be obtained. To verify the proposed method, the electromechanical responses of silicone elastomer filled with different CNPs under different filling amounts were investigated numerically and experimentally, respectively, and the results were in good agreement. Therefore, the multiscale analysis method can not only reveal the strain−sensing mechanism of the composite from the microscale, but also effectively predict the electromechanical behavior of the CNPs−filled polymer with different material parameters.

show abstract

“…[31] And sensors integrated temperature, humidity, pressure, stress responses and so on are obtained. [32][33][34][35][36][37] For instance, Crispin et al successfully developed a cellulose aerogels-based sensor enable pressure,…”

Section: Introductionmentioning

confidence: 99%

Multifunctional E‐Textiles Based on Biological Phytic Acid‐Doped Polyaniline/Protein Fabric Nanocomposites

Wang

Zhang

Cao

et al. 2021

Adv Materials Technologies

View full text Add to dashboard Cite

Flexible sensors are the footstone of the internet‐of‐things as they combine one with the real world. However, to date, it's still a challenge to fabricate multifunctional and reliable sensors with ease of approach and eco‐friendly materials. Herein, a multifunctional electronic textile based on biological phytic acid‐doped hierarchically structured polyaniline/protein fabric nanocomposites, is presented. Benefiting from its property of transition in doping and de‐doping state, the E‐textile exhibits practicability in human‐machine interactions, environment monitoring, and flame retardance. Owing to the construction of microfibers conductive network, the E‐textile presents high strain sensitivity and ultralow detection limit (0.1% of strain) for monitoring tiny‐human motions accurately. Meanwhile, it exhibits speedy response to ammonia (1.3 s) and excellent flame retardance which can work steadily after the fire treatment. This novel and sustainable strategy of preparing high‐performance devices with bio‐materials broaden the opportunities for the development of eco‐friendly functional materials and devices.

show abstract

Coco Stretch: Strain Sensors Based on Natural Coconut Oil and Carbon Black Filled Elastomers

Cited by 15 publications

References 61 publications

A Variable Stiffness Magnetic Catheter Made of a Conductive Phase‐Change Polymer for Minimally Invasive Surgery

A Variable Stiffness Magnetic Catheter Made of a Conductive Phase‐Change Polymer for Minimally Invasive Surgery

Multiscale Analysis of the Highly Stretchable Carbon−Based Polymer Strain Sensor

Multifunctional E‐Textiles Based on Biological Phytic Acid‐Doped Polyaniline/Protein Fabric Nanocomposites

Contact Info

Product

Resources

About