A multi-purpose adhesive with high strength and bond sensitive stress sensing

Abstract

Despite the important roles of pressure-sensitive adhesives (PSA) and hot-melt adhesives (HMA) in wood furniture, aerospace, and other fields, the inherent contradiction between them owing to their different molecular mechanisms remains a great challenge in developing high-performance, multi-purpose adhesives. In this study, butylphenyl crosslinked polymers were constructed to overcome the intrinsic contradiction between PSA and HMA and to develop a multi-purpose adhesive. The formation of electrostatic interactions and hydrogen bonding networks between inter/intramolecular functional groups gave PSA excellent adhesive strength (3.0 MPa) and peel strength (4.7 N/cm) at light pressures of 0.3 MPa. Interestingly, PSA has the ability to achieve repeatable bonding performance at the gluing interface and excellent underwater bonding performance owing to its special crosslinked network structure consisting of long alkane chains and the synergistic effect of fillers (rosin and nano-silica). Multifunctionalities, such as heterointerfacial adhesion, rapid bonding, reuse, interfacial debonding, and container leakage repair, have been achieved.