Developing a printed elastomeric wearable sensor with
good conformity
and proper adhesion to skin, coupled with the capability of monitoring
various physiological parameters, is very crucial for the development
of point-of-care sensing devices with high precision and sensitivity.
While there have been previous reports on the fabrication of elastomeric
multifunctional sensors, research on the printable elastomeric multifunctional
adhesive sensor is not very well explored. Herein, we report the development
of a stencil printable multifunctional adhesive sensor fabricated
in a solvent-free condition, which demonstrated the capability of
having good contact with skin and its ability to function as a temperature
and strain sensor. Functionalized liquid isoprene rubber was selected
as the matrix while carboxylated multiwalled carbon nanotubes (c-CNTs)
were used as the nanofiller. The selection of the above model compounds
facilitated the printability and also helped the same composition
to demonstrate stretchability and adhesiveness. A realistic three-dimensional
microstructure (representative volume element model) was generated
through a computational framework for the current c-CNT-liquid elastomer.
Further computational simulations were performed to test and validate
the correlation between electrical responses to that of experimental
studies. Various physiological parameters like motion sensing, pulse,
respiratory rate, and phonetics detection were detected by leveraging
the electrically resistive nature of the sensor. This development
route can be extended toward developing different innovative adhesives
for point-of-care sensing applications.