Morphological aspects of carbon nanofillers and their hybrids for actuators and sensors

Abstract

Rubber nanocomposites were prepared by mixing room-temperature-vulcanized (RTV) silicone rubber and nanofillers such as graphitic nanofillers (GRs), carbon nanotubes (CNTs), and carbon black (CB) for industrial applications. The possible correlations were examined between the properties and morphology of the fillers. The vulcanizates based on the CNT hybrid showed higher reinforcement with as an elastic modulus of 5.3 MPa compared to 3.2 MPa for GR flakes and 3.1 MPa for the CB hybrid at 8 phr. Similarly, lower resistances of 17 kX at 4 phr and 0.7 kX at 12 phr were obtained for the CNT hybrid. A correlation was determined between the mechanical and electrical properties in enhancing the displacements of the nanocomposites when used in actuators. Such improvements might be useful for flexible electrodes, energy harvesting, or actuators. POLYM.

Conductive films of sonicated multiwall carbon nanotubes on stretchable substrates

“…There have been various studies of the use of conducing films on stretchable substrates for energy harvesting, actuation displacements and sensors . Xiao et al .…”

“…studied the properties of organo‐clay‐reinforced silicone rubber . Our previous work studied actuation displacement at various voltages in silicone rubber . Leineweber et al .…”

“…[12][13][14] There have been various studies of the use of conducing films on stretchable substrates for energy harvesting, actuation displacements and sensors. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] Xiao et al studied a silicone rubber-based energy generator for harvesting water wave energy. 15 Hassouneh et al studied high breakdown actuation strength in liquid silicone rubber.…”

“…21 Our previous work studied actuation displacement at various voltages in silicone rubber. 3,[22][23][24] Leineweber et al reported a new tactile sensor chip based on silicone rubber. 25 Akbari et al studied dielectric elastomer actuators for uniaxial strain, electromechanical behavior and tissue engineering applications.…”

Development of sunflower oil‐based nonisocyanate polyurethane/multiwalled carbon nanotube composites with improved physico‐chemical and microwave absorption properties

“…Due to high conductivity and good dielectric and magnetic properties, carbon based materials such as graphite, expanded graphite and single or multiwalled CNTs have been widely used as EMI shields [34][35][36][37]. Literature survey reveals that several studies have been reported on the EMI shielding properties of CNT and polymeric resins composites [34,36,[38][39][40]. Recently, Gupta et al studied the EMI shielding properties of acid modified multiwalled CNTs (a-MWCNTs) reinforced PU composite films with 10 wt% of a-MWCNTs, where 229 dB shielding effectiveness was observed at thickness 1.5 mm with 10 wt% a-MWCNTs [36].…”