Subsurface Patterning and its Effect on Interfacial Adhesion
Edwin P. Chan, Christopher M. Stafford
Nature (e.g. geckos and insects) has illustrated that a patterned surface can effectively tailor the adhesion of an interface. Inspired by the amazing attachment and detachment ability of these animals, significant efforts have been put forth to understand the effects of patterned surfaces on polymer adhesion. While patterned surfaces have been demonstrated to tailor and even enhance polymer adhesion, the adhesion of a flat interface that consists of subsurface patterns remains largely unexplored. Compared with surface patterns, a subsurface pattern is particularly interesting since it provides a practical means to dynamically change adhesion without directly altering the interfacial properties. For example, this approach will be especially useful as a responsive adhesive that can provide on-demand release. In this presentation, we investigate the role of subsurface patterns in controlling the adhesion of a flat interface consisting of a poly(dimethylsiloxane) (PDMS) elastomer and an inorganic surface. The subsurface pattern consists of a wrinkled interface that is buried within the PDMS elastomer. A cantilever-based peel test is used to measure the adhesion of these subsurface patterned elastomers. We explore the effects of wrinkle pattern dimensions in controlling the adhesion of these materials.
and Stafford, C.
Subsurface Patterning and its Effect on Interfacial Adhesion, 32nd Annual Meeting of the Adhesion Society, Savannah, GA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=901402
(Accessed February 27, 2024)