Three-dimensionally printed pressure sensor arrays from hysteresis-less stretchable piezoresistive composites
| Autor: | Yejin Jo, Young-Min Choi, Su Yeon Lee, Jong Hyun Kang, Sunho Jeong, Ju-Young Kim, Hyun-Suk Kim, Sung Mook Jung |
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| Rok vydání: | 2019 |
| Předmět: |
Fabrication
Materials science General Chemical Engineering Composite number 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Elastomer 01 natural sciences Piezoresistive effect Pressure sensor Viscoelasticity 0104 chemical sciences Hysteresis Copolymer Composite material 0210 nano-technology |
| Zdroj: | RSC Advances. 9:39993-40002 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c9ra08461d |
| Popis: | In this study, we formulate three-dimensionally (3D) printable composite pastes employing electrostatically assembled-hybrid carbon and a polystyrene-polyisoprene-polystyrene tri-block copolymer elastomer for the fabrication of multi-stack printed piezoresistive pressure sensor arrays. To address a critical drawback of piezoresistive composite materials, we have developed a previously unrecognized strategy of incorporating a non-ionic amphiphilic surfactant, sorbitan trioleate, into composite materials. It is revealed that the surfactant with an appropriate amphiphilic property, represented by the hydrophilic-lipophilic balance (HLB) index of 1.8, allows for a reversible piezoresistive characteristic under a wide pressure range up to 30 kPa as well as a significant reduction of elastomer viscoelastic behavior. The 3D-printed pressure sensor arrays exhibit a sensitivity of 0.31 kPa−1 in a linear trend, and it is demonstrated successfully that the position-addressable array device is capable of spatially detecting objects up to a pressure level of 22.1 kPa. |
| Databáze: | OpenAIRE |
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