Dynamic Properties under Cyclic Strain Test in Conductive Polymer Nanocomposites for Stretchable Electrodes
발표자
()
초록
내용
Stretchable materials are in demand in biomedical engineering and electronics industries. Among them, the conductive polymer nanocomposite for stretchable electrodes improves electrical conductivity by adding conductive nanofillers to the elastic polymer matrix. Carbon nanotubes (CNTs) and silver nanowires (AgNWs) as conductive nanofillers form aggregates in the polymer matrix due to strong van der Waals force and cause deterioration of material properties. To improve the dispersion of nanofillers in polydimethylsiloxane matrix, ultrasonic treatment was performed after adding isopropyl alcohol and methyl silicone oiI. Dynamic mechanical properties and electrical conductivity under cyclic strain test were investigated depending on CNT and AgNW contents. The highest electrical conductivity was obtained when the CNT and AgNW contents were 2 wt%, respectively, and the average electrical conductivity was about 10 S/m in a 5,000 cycle test with a 40% strain.