Cavity shape transformation during peeling on elastic microchannel-patterned substrates filled with a viscous liquid

被引：3

作者：

Chaudhari, Nayantika ^{[1
,2
]}

Deshpande, Tushar ^{[1
,2
]}

Singh, Yogesh R. G. ^{[1
,2
]}

Patil, Sandip ^{[1
,2
]}

Kulkarni, Manish ^{[1
,2
]}

Raut, Janhavi ^{[3
]}

Sharma, Ashutosh ^{[1
,2
]}

机构：

[1] Indian Inst Technol, Dept Chem Engn, Kanpur 208016, Uttar Pradesh, India

[2] Indian Inst Technol, Ctr Nanosci, Kanpur 208016, Uttar Pradesh, India

[3] Unilever R&D, 64 Main Rd, Bangalore 560066, Karnataka, India

来源：

SOFT MATTER | 2017年 / 13卷 / 12期

关键词：

GECKO FOOT-HAIR; INSTABILITY PATTERNS; CONTACT INSTABILITY; SURFACE-ROUGHNESS; SOFT ADHESIVES; GAS-BUBBLES; CAVITATION; GROWTH; FILMS; THIN;

D O I：

10.1039/c7sm00016b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 pressuresensitive adhesives.

引用

页码：2394 / 2401

页数：8

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