Fig. 6: UV protection, adhesion and friction resistance of ionogels.

a UV transmittance curves of PU-H and PU-HR; b XRD spectra of PU-H and PU-HR, with inset photographs comparing light transmission properties of PU-H and PU-HR thin ionogels adhered to transparent glass; c Adhesion strength–displacement curves of PU-H and PU-HR on glass pane; d Adhesion strength-displacement curves of PU-H and PU-HR on PVC panel; e Microstructure of bonding interface of PU-HR and glass pane; f Microstructure of bonding interface of PU-HR and PVC panel; g SEM-EDX mapping showing distribution of C, O, N and S at bonding interface of PU-HR and PVC panel; h 2D morphology of friction damage to PU-H coating and PU-HR coating; i Friction coefficients of PU-H coating and PU-HR coating; j Macroscopic images showing UV shielding properties of PU-H and PU-HR. 1 shows RMB 10 note with no covering under 365 nm UV lamp irradiation, 2 shows RMB 10 note covered with PU-H under 365 nm UV lamp irradiation, 3 shows RMB 10 note covered with PU-HR under 365 nm UV lamp irradiation, 4 shows digital photograph of model umbrella under natural light, 5 shows digital photograph of uncoated half of model umbrella under 365 nm UV light, 6 shows digital photograph of PU-HR coated half of model umbrella under 365 nm UV light.