  Polydimethylsiloxane (PDMS) is an insulator and it is commonly used in
fabrication of micro-structures but there is a need of electrical conductive
PDMS. Therefore, this research is mainly focused on producing PDMS
nanocomposites with high electrical conductivity. Thus, we produced highly
conductive PDMS nanocomposites which were filled with multiwalled carbon
nanotubes (MWCNTs) and graphene nanoplatelets (GNPs). Due to the synergistic
effect between CNTs and GNPs inside a polymeric matrix, we expected to obtain
more conductive nanocomposites than PDMS nanocomposite filled with only CNTs.
Additionally, we investigated the effect of sulfuric acid treatment to surface
composition and electrical conductivity of prepared PDMS/MWCNT/GNP
nanocomposites. Results indicated that electrical conductivity of sulfuric
acid-treated samples was significantly higher than untreated samples. The level
of conductivity in the range of from 270.7 to 1074.9 S/m was obtained, and the
higher ones are the samples treated with acid solution.
