Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session D15: Polymer Gels
3:00 PM–6:00 PM,
Monday, March 6, 2023
Room: Room 207
Sponsoring
Unit:
DPOLY
Chair: Gabriel Sanoja, The University of Texas at Austin
Abstract: D15.00011 : The Effects of Small Molecule Acids on PAAMPSA/PANI Systems*
5:00 PM–5:12 PM
Presenter:
Colton L Duprey
(University of Maine)
Author:
Colton L Duprey
(University of Maine)
Collaboration:
MEAN Lab
that a sensitive, flexible, comfortable, and biologically compatible material is required to
make an optimal biosensor. As a result, polymeric piezoresistive sensors show great
promise in movement monitoring and biosensing. Their polymer composition provides
flexibility and stretchability which allows for unique sensor applications where traditional
metallic sensors are too brittle and rigid. The polymer complex to be used as a strain
sensor is composed of a templating poly(2-acrylamido-2-methyl-1-propanesiulfonic
acid), polyaniline, and a small molecule p-type dopant, originally phytic acid. By substituting the
small molecule dopant for various other small molecule acids, the impacts the various
dopants have on the strain sensor’s conductivity, mechanical properties, and
piezoresistive sensitivity can be studied. Typically, small molecule dopants that increase
conductivity decrease stretchability and mechanical stability, which stems from more
acidic dopants being able to protonate and facilitate ion transport throughout the sensor.
On the opposite hand, functional groups with increased hydrogen bonding tend to
increase mechanical properties, as well as allow for autonomous self-healing. By
increasing our understanding of the impact these various dopants have on the
properties of the strain sensor, we can tailor the usage of these small molecule dopants
as we try to increase the sensitivity and conductivity of our sensor for usage in
biosensing and kinesiological monitoring applications.
*The authors would like to thank a National Science Foundation (MPS/DMR/Electronic and Photonic Materials) CAREER Award (award number: 1942492) for support
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