Fig. 5: Serviceability of CCAP-based organohydrogel in harsh environments.
a, Schematic illustrations for the synthesis of organohydrogel with an interpenetrating oleophilic–hydrophilic network by soaking the CCAP hydrogel in ethanol solution containing BMA, LMA, EGDMA and DEAP and the subsequent ultraviolet-irradiation-induced polymerization. b, Schematic illustrations of the adaptive mechanism of the organohydrogel in water and hydrophobic organic solvents. In water, the swollen hydrophilic polymer chains are exposed on the gel surface. In organic solvents, the oleophilic chains are switched on the surface. c,d, Compressive stress–strain curves in water (c) and in n-heptane (d) under cyclic compression. The photographs show the recovered organohydrogels after releasing compression. e, Maximum stress retention after 1,000 compression cycles in water and different hydrophobic organic solvents. f, Normalized resistance change (ΔR/R0) of the organohydrogel versus pressure in n-heptane. g, ΔR/R0 in n-heptane during nine compression cycles at different strains. h, ΔR/R0 during 100 compression cycles at 50% strain in n-heptane. i, Stress–strain curves for 100 compression cycles at −50 °C. The inserted photographs show good recovery of the organohydrogel after the compression. j, ΔR/R0 during 100 compression cycles at 50% strain at −50 °C. k,l, Photographs showing the bulb getting brighter when compressing the organohydrogel in n-heptane (k) and liquid nitrogen (l).
