Electromagnetic interference (EMI) shielding materials
with stretchability
are important for developing wearable and flexible appliances. Herein,
lithium bis(trifloromethanesulfonyl)imide (Li-TFSI)-doped poly(3,4-ethylenedioxythiophene):poly(styrene
sulfonate) (PEDOT:PSS) and carboxylated styrene-butadiene rubber (XSB)
latex are used to prepare stretchable EMI shielding composite films
of 0.2 mm in thickness. In these films, the doped PEDOT:PSS nanoparticles
form tenuous conductive pathways between the hexagonally packed latex
particles, resulting in higher EMI shielding efficiency (EMI SE) compared
with the films containing traditional dopant ethylene glycol. For
the purpose of stretchable EMI shielding, the films containing 6 wt
% PEDOT:PSS and 6 wt % Li-TFSI demonstrate EMI SE of 50 and 30 dB
(12.4 GHz) at 0 and 100% strains, respectively, being the highest
values among the reported shielding composites except for those using
liquid metal as the filler. The investigation also provides a simple
and environmentally friendly preparation method being highlighted
for the development of lightweight stretchable EMI shielding materials
for applications in flexible electronics in the near future.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.