Cavity shape transformation during peeling on elastic microchannel-patterned substrates filled with a viscous liquid. Issue 12 (10th March 2017)

• Record Type: Journal Article
• Authors: Chaudhari, Nayantika; Deshpande, Tushar; Singh, Yogesh R. G.; Patil, Sandip; Kulkarni, Manish; Raut, Janhavi; Sharma, Ashutosh
• Is Part Of: Soft matter. Volume 13:Issue 12(2017)
• Page Start: 2394
• Page End: 2401
• Publication Date: 2017-03-10
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/c7sm00016b
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : We studied the change in cavity shape during peel tests on a 10% cross-linked polydimethylsiloxane (PDMS) elastic microchannel filled with 1% cross-linked viscous PDMS liquid (patterned bilayer). Abstract : Inspired by the detachment mechanics of natural adhesive pads, we studied the change in cavity shape during peel tests on a 10% cross-linked polydimethylsiloxane (PDMS) elastic microchannel filled with 1% cross-linked viscous PDMS liquid (patterned bilayer). During peeling, we explored cavity shape as a function of microchannel dimensions and correlated the dimensionless cavity shape factor (CSF) and characteristic stress decay length, K −1 . The peel test on the liquid-filled elastic microchannel shows three distinct cavity-shape regimes, elliptical, circular, and binary, based on the values of CSF and K −1 . Such cavity formation and shape regimes could be important for improving the design of pressure-sensitive adhesives.