A research team discovers universal mechanism that leads to adhesion hysteresis in soft materials.
Through a combination of experimental observations and simulations, the team demonstrated that roughness interferes with the separation process, causing the materials to detach in minute, abrupt movements, which release parts of the adhesive bond incrementally.
Adhesive tape or sticky notes are easy to attach to a surface, but can be difficult to remove. This phenomenon, known as adhesion hysteresis, can be fundamentally observed in soft, elastic materials: Adhesive contact is formed more easily than it is broken. Researchers at the University of Freiburg, the University of Pittsburgh and the University of Akron in the US have now discovered that this adhesion hysteresis is caused by the surface roughness of the adherent soft materials.
3D-printable gels with improved and highly controlled properties can be created by merging micro- and nano-sized networks of the same materials harnessed from seaweed. The findings could have ... New research finds the missing link between soft surface adhesion and the roughness of the hard surface it touches. The key to this foundational discovery is a close look at the rough surface itself ...
Stretchable skin-like robots that can be rolled up and put in your pocket have been developed by a team using a new way of embedding artificial muscles and electrical adhesion into soft ...
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