Forced Detachment of Immersed Elastic Rubber Beads
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- 作者：H. Gé ; rardin ; A. Burdeau ; A. Buguin ; F. Brochard-Wyart
- 刊名：Langmuir
- 出版年：2007
- 出版时间：September 11, 2007
- 年：2007
- 卷：23
- 期：19
- 页码：9704 - 9712
- 全文大小：594K
- 年卷期：v.23,no.19(September 11, 2007)
- ISSN：1520-5827
文摘
We investigate the strength of adhesion and the dynamics of detachment of elastic beads (Young's modulus E 
f">1 MPa) adhering to a horizontal solid surface in a viscous liquid. The beads are initially compressed on the surface.Their unbinding is imposed by fast vertical stretching (above a certain threshold value). The decrease in the contactradius is monitored by interferential microscopy. We find that the dynamics of detachment involves three steps: (i)fast elastic decompression, (ii) slow adhesive detachment, and (iii) catastrophic rupture. They can be interpreted bya transfer of the Johnson Kendall Roberts (JKR) energy toward viscous losses in the liquid wedge, near the rubber/solid/liquid (R/S/L) contact line.
f">1 MPa) adhering to a horizontal solid surface in a viscous liquid. The beads are initially compressed on the surface.Their unbinding is imposed by fast vertical stretching (above a certain threshold value). The decrease in the contactradius is monitored by interferential microscopy. We find that the dynamics of detachment involves three steps: (i)fast elastic decompression, (ii) slow adhesive detachment, and (iii) catastrophic rupture. They can be interpreted bya transfer of the Johnson Kendall Roberts (JKR) energy toward viscous losses in the liquid wedge, near the rubber/solid/liquid (R/S/L) contact line.