Figure 5.

Sensory and electrical performances of the cellulose-based hydrogel CH3. (A) Resistance change ratio variations (ΔR/R₀) and stress versus tensile strain. (B) Linear relationship between ΔR/R₀ and strain, with a gauge factor (GF) within 10% of tensile strain. (C) ΔR/R₀ at different tensile strains. (D) Fatigue resistance at 70% tensile strain for 1000 cycles, at a speed of 10 mm/s. (E) ΔR/R₀ response to manual loading–unloading of 995 Pa. The response of the strain sensor for monitoring biosignals corresponding to (F) tapping the keyboard, (G) writing, and (H) grasping.