“…graphene oxide (GO), layered double hydroxides (LDH), and even MoS 2 ; Ji et al, 2015; Wang et al, 2016; Zhang and Choi, 2014, 2015) and mesoporous particles (Yin and Chao, 2002) have been explored to improve the properties of ER fluids. In particular, conducting polymers such as polyaniline (Gow and Iv, 1990; Ozkan and Unal, 2015), polypyrrole (PPy; Goodwin et al, 1997; Mrlík et al, 2011), poly( p -phenylene) (PPP; Kim and Song, 2002), poly( p -phenylenediamine) (PPDA; Cao et al, 2016) and their composites have been widely studied as ER dispersed phase. Among them, PPy is one of the most promising candidates due to its facile fabrication, low toxicity, high polarizability, controllable electrical conductivity realized by doping/dedoping procedure, and excellent thermal and environmental stability (Mrlík et al, 2011).…”