biostudies-literatureSun YNational Natural Science Foundation of China211632https://www.ebi.ac.uk/biostudies/studies/S-EPMC8753166biostudies-literatureUnknown9(1)The measurement of the droplets' elasticity is vitally important in microfluidic and ink-jet printing. It refers to the ability of the droplet to restore its original shape and strong robustness. This study investigated a novel method to measure elasticity. The plate coated with super-hydrophobic layers pressed on a droplet and the elastic force was recorded by an electronic balance. Meanwhile, a mathematical model was constructed to calculate the changes of the droplet area under the force. The measurement showed that external work mainly converts into surface energy and the damping ratio increases from 0.068 to 0.261 with the increase of mass fraction from 0 to 80 wt%. It also indicates that the novel method can accurately and efficiently measure the elasticity of droplets.Royal Society open scienceElasticity and damping ratio measurement of droplets on super-hydrophobic surfaces.PMC87531665207538451805367Song LZheng YZhao MSun PTee CATZhou YSun YfalseElasticity and damping ratio measurement of droplets on super-hydrophobic surfaces.The measurement of the droplets' elasticity is vitally important in microfluidic and ink-jet printing. It refers to the ability of the droplet to restore its original shape and strong robustness. This study investigated a novel method to measure elasticity. The plate coated with super-hydrophobic layers pressed on a droplet and the elastic force was recorded by an electronic balance. Meanwhile, a mathematical model was constructed to calculate the changes of the droplet area under the force. The measurement showed that external work mainly converts into surface energy and the damping ratio increases from 0.068 to 0.261 with the increase of mass fraction from 0 to 80 wt%. It also indicates that the novel method can accurately and efficiently measure the elasticity of droplets.2022-01-01T00:00:00Z2022 Jan2026-05-31T08:58:20.646Z2025-04-05T15:23:06.792ZS-EPMC87531663524235410.1098/rsos.211632