Extended Data Fig. 5: Adhesion tests.
From: Resilient yet entirely degradable gelatin-based biogels for soft robots and electronics
a, Schematic of the 90° peel-test used to measure the debond energy between a biogel slightly pressed against diverse substrates. A 6 µm thick PET foil serves as stiff backing to prevent elongation of the peel arm, whereas a linear guiding ensures a constant angle of 90°. b, Measured debond energy for aluminum (blue), paper (purple), porcine skin (turquoise), PDMS (orange) and Ecoflex (red). c, Photographs of a biogel-porcine skin peel-sample taken during a peel-test showing the propagation of the peel-front between biogel and substrate. Mean values (solid line) and standard deviation (shadow) for n > 4 samples each. Scale bar, 1 cm.
