A analysis group led by Prof. Wang Lengthy from the Ningbo Institute of Supplies Expertise and Engineering (NIMTE) of the Chinese language Academy of Sciences has developed a extremely stretchable and conductive foam sensor with an ultra-wide operational vary utilizing supercritical CO2 (scCO2) foaming. The examine was published in Supplies At present Physics.
Piezoresistive pressure sensors make the most of conductive elastomeric composite foams to detect motion or contact. These sensors are light-weight, extremely compressible, and exhibit secure responses, making them promising for functions in movement monitoring, well being monitoring, human-robot interplay, and robotics.
Porous conductive supplies are promising for versatile electronics; nevertheless, electrical failure or materials harm throughout stretching limits their pressure response vary.
To beat this problem, the researchers launched a porous construction in a segregated composite made from excessive facet ratio carbon nanostructures (CNS) and versatile polyolefin elastomer (POE). By using scCO2 foaming, they had been in a position to reconstruct the conductive community construction, leading to porous conductive supplies with an ultra-wide pressure response vary.
The developed POE/CNS foam reveals exceptional stretchability (952.5% pressure), elasticity (with a residual pressure of 13.8%), and electrical conductivity (with a resistance of fifty kΩ). The segregated construction provides the POE/CNS foam sensor an distinctive pressure response vary from 0.5% to 762%, considerably outperforming randomly distributed constructions.
Along with excessive sensitivity, speedy response, and excellent reproducibility, the POE/CNS foam sensor maintains secure efficiency over 4,000 tensile cycles, showcasing distinctive long-term sturdiness.
This work presents a easy and eco-friendly methodology for producing high-performance polymer-based foam sensors, indicating robust potential for functions in wearable electronics and engineering gear.
Extra data:
Xueyun Li et al, Novel design technique for extremely stretchable and delicate foam sensor with an ultra-wide pressure vary, Supplies At present Physics (2025). DOI: 10.1016/j.mtphys.2025.101741
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Stretchable polymer foam sensor detects wide selection of movement with excessive sensitivity (2025, July 2)
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