Properties of acrylic pressure sensitive adhesives combining classical and mussel-inspired mechanisms of adhesion

摘要

Modification of acrylic PSA with catechol moieties leads to significant enhancement of adhesion. The hybrid bio-rheological mechanism of adhesion is fully observed when the content of catechol groups in the MIPSA reaches certain limit and adhesion becomes practically temperature independent. The mussel-inspired acrylic PSAs also demonstrate quite close consistence with the Dahlquist criterion of tack. MIPSAs with comparatively low content of catechol demonstrate increasing tack (W_A=178 J/m~2 for MIPSA, containing 4.5%mol of DHP), whereas the MIPSA, overloaded with catechol moieties, exhibit temperature-independent character of adhesion. Both these PSAs can be considered as effective platforms for the development of bio-inspired adhesives of new generation.