Journal
MICROMACHINES
Volume 12, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/mi12101185
Keywords
inkjet printing; cross-cut test; printed electronics; strain sensor; carbon fiber reinforced polymers
Categories
Funding
- University of Sheffield Department of Material Science
- Turkish Ministry of Education
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Inkjet-printing technology allows contactless deposition of functional materials and can be used for printed electronics and manufacturing sensors. By printing silver nanoparticle strain sensors using inkjet technology, optimized conductive and adhesive performance can be achieved, eliminating the use of interfacial adhesives and potential failure due to delamination.
Inkjet-printing technology enables the contactless deposition of functional materials such as conductive inks on surfaces, hence reducing contamination and the risk of substrate damage. In printed electronics, inkjet technology offers the significant advantage of controlling the volume of material deposited, and therefore the fine-tuning of the printed geometry, which is crucial for the performance of the final printed electronics. Inkjet printing of functional inks can be used to produce sensors to detect failure of mechanical structures such as carbon fiber reinforced composite (CFRC) components, instead of using attached sensors, which are subject to delamination. Here, silver nanoparticle-based strain sensors were embedded directly in an insulated carbon-fiber laminate by using inkjet printing to achieve an optimized conductive and adhesive geometry, forming a piezoresistive strain sensor. Following the inkjet-printing optimization process, the sensor conductivity and adhesion performance were evaluated. Finally, the sensor was quantified by using a bending rig which applied a pre-determined strain, with the response indicating an accurate sensitivity as the resistance increased with an increased strain. The ability to embed the sensor directly on the CFRC prevents the use of interfacial adhesives which is the main source of failure due to delamination.
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