Improved resistance stability for tactile sensor fabrication and investigation of the dispensing parameters of a nanocomposite material

Fekiri, Chaima; Kim, Song Ho; Kim, Ho-Chan; Lee, In Hwan

doi:10.1007/s12206-019-1104-5

Cited by 6 publications

(2 citation statements)

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“…Controlling these parameters allows controlling the paste flow as well, which is another challenge regarding the DIW process, as the flow properties of the material depend on various factors, including the amount of residue solvent in the composite and the quality of dispersion. In the authors' previous work, it has been shown that the line width and height of the printed specimens are correlated with the extrusion pressure and the printing speed and the stand-off distance [28]. For example, by increasing the printing speed, for a given dispensing pressure and given nozzle diameter, the line width and height will decrease, and vice versa.…”

Section: Direct Ink Writing Processmentioning

confidence: 97%

“…Each motion controller receives a G-code from a computer through a control board (LX504, Comizoa, Daejeon, Korea). specimens are correlated with the extrusion pressure and the printing speed and the stand-off distance [28]. For example, by increasing the printing speed, for a given dispensing pressure and given nozzle diameter, the line width and height will decrease, and vice versa.…”

Section: Direct Ink Writing Processmentioning

confidence: 99%

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3D-Printable Carbon Nanotubes-Based Composite for Flexible Piezoresistive Sensors

2020

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The intersection between nanoscience and additive manufacturing technology has resulted in a new field of printable and flexible electronics. This interesting area of research tackles the challenges in the development of novel materials and fabrication techniques towards a wider range and improved design of flexible electronic devices. This work presents the fabrication of a cost-effective and facile flexible piezoresistive pressure sensor using a 3D-printable carbon nanotube-based nanocomposite. The carbon nanotubes used for the development of the material are multi-walled carbon nanotubes (MWCNT) dispersed in polydimethylsiloxane (PDMS) prepolymer. The sensor was fabricated using the direct ink writing (DIW) technique (also referred to as robocasting). The MWCNT-PDMS composite was directly printed onto the polydimethylsiloxane substrate. The sensor response was then examined based on the resistance change to the applied load. The sensor exhibited high sensitivity (6.3 Ω/kPa) over a wide range of applied pressure (up to 1132 kPa); the highest observed measurement range for MWCNT-PDMS composite in previous work was 40 kPa. The formulated MWCNT-PDMS composite was also printed into high-resolution 3-dimensional shapes which maintained their form even after heat treatment process. The possibility to use 3D printing in the fabrication of flexible sensors allows design freedom and flexibility, and structural complexity with wide applications in wearable or implantable electronics for sport, automotive and biomedical fields.

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Section: Direct Ink Writing Processmentioning

confidence: 97%

Section: Direct Ink Writing Processmentioning

confidence: 99%