Fibrillar adhesives with unprecedented adhesion strength, switchability and scalability.

ABSTRACT: Bio-inspired fibrillar adhesives have received worldwide attention but their potentials have been limited by a trade-off between adhesion strength and adhesion switchability, and a size scale effect that restricts the fibrils to micro/nanoscales. Here, we report a class of adhesive fibrils that achieve unprecedented adhesion strength (∼2 MPa), switchability (∼2000), and scalability (up to millimeter-scale at the single fibril level), by leveraging the rubber-to-glass (R2G) transition in shape memory polymers (SMPs). Moreover, R2G SMP fibrillar adhesive arrays exhibit a switchability of >1000 (with the aid of controlled buckling) and an adhesion efficiency of 57.8%, with apparent contact area scalable to 1000 mm², outperforming existing fibrillar adhesives. We further demonstrate

SUBMITTER: Linghu C 

PROVIDER: S-EPMC11413535 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature