In situ Measurement of the Adhesion Strength and Effective Elastic Stiffness of Single Soft Micropillar
- In situ Measurement of the Adhesion Strength and Effective Elastic Stiffness of Single Soft Micropillar
- 이지영; 성원경; 최인석; Ranajay Ghosh; Ashkan Vaziri; 양철웅; 이광렬; 문명운
- Adhesion; single pillar; in situ measurement; bio-inspired
- Issue Date
- The Journal of adhesion
- VOL 91, NO 5, 369-380
- We report the deformation behavior and mechanical properties of a polymeric micropillar, which measures approximately 10 lm by 30 lm in size by measuring the loading=unloading response using an in situ force measurement system. When the single poly (dimethylsiloxane) (PDMS) micropillar was subjected to compression, we observed a periodic wrinkle and global (Euler) buckling at the sidewall. During unloading, we found the pull-off force (adhesion force) to increase for higher values of preloading and also for lower loading=unloading rates. From the slope of the
load–displacement curves measured in situ, we calculated the effective elastic stiffness of the PDMS micropillar to be about 2.03 MPa. In addition to the current work, we report that this method can be used more broadly for in situ measurement of the intrinsic mechanical and adhesion properties of polymers and other relatively soft materials.
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