Fabrication, Design and Application of Stretchable Strain Sensors for Tremor Detection in Parkinson Patient

Biocompatible, Electroconductive, and Highly Stretchable Hybrid Silicone Composites Based on Few-Layer Graphene and CNTs

“…The schematic illustration of the mechanism underlying the conductivity of hybrid composites during stretching–releasing cycles is presented in Figure 5 c. The stretching of CNT/G/PDMS composites causes some permanent damage to the CNTs networks (the red circles), which results in the conductivity loss. However, graphene sheets serve as bridges (the blue circles) between CNTs during the stretching/releasing process, so the conductive network is more easily reconstructed compared to single filler composites (CNT/PDMS and G/PDMS) [ 21 ]. Thus, the obtained results demonstrate a great potential of CNT/G/PDMS composites for flexible electronics applications.…”

“…Although many researchers have studied the polydimethylsiloxane (PDMS) composites with either CNTs or graphene fillers, there have been few studies on properties of silicone composites containing CNT–graphene hybrid materials [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. In particular, Hu et al [ 16 ] investigated the dispersion of G/CNTs hybrid fillers in silicone rubber.…”

“…However, the composite fabrication techniques employed in these studies have some significant drawbacks for biomedical applications. In particular, the production of G/CNT hybrid fillers has been carried out mainly through a solution blending method involving the use of solvents (tetrahydrofuran [ 16 , 17 , 18 , 19 ], hexane [ 20 , 21 ], acetate [ 23 ], toluene [ 24 ], etc. ), which can affect the toxicity of ultimate composites and contribute to the deterioration of their electrical and mechanical properties.…”

Silicone Composites with CNT/Graphene Hybrid Fillers: A Review

“…In particular, numerous research teams applied sonication, stirring, and solution blending in various solvents (tetrahydrofuran (THF) (Hu et al [ 34 ], Pradhan et al [ 35 ], Oh et al [ 36 ]), hexane (Yang et al [ 37 ], Kantarak et al [ 38 ]), isopropyl alcohol (IPA) + Stoddard solvent (Lee et al [ 39 ]), acetate (Yan et al [ 40 ]), and toluene (Shafiei et al [ 41 ]) to produce hybrid silicone composites with a variety of filler concentrations and CNT/G mass ratios (see Table A1 ). The as-prepared composites possessed the π–π stacked structure of h CNT/G type and demonstrated the synergistic improvement of their electrical, mechanical, and thermal properties.…”

“…The use of CTAB, OP-10 and SDS enabled to produce hybrid composites of h CNT/G type with electrostatically bonded graphene and CNTs. The study reported that due to the electrostatic self-assembly, the obtained CNT/G/PDMS composites possessed a superior homogeneity and decreased percolation threshold (0.92 wt%) as compared to composites with π–π stacked CNT/G hybrid fillers (2 wt% [ 36 ] and 5 wt% [ 38 ]).…”