International. Self-healing adhesives are materials with remarkable practical potential for long-term adhesion. However, reports are extremely limited due to the fact that it is difficult to meet the self-healing properties of high strength and efficiency. A new versatile method overcomes this bottleneck.
In their study, the Chinese researchers have introduced rigid and flexible alternating segments into the dynamic cross-link quaternization of poly (1,2,3-triazole) and vitrimer (VPTA) adhesives.
Consequently, VPTA adhesive demonstrates a particularly high adhesive strength of 23.7 MPa, compared to self-healing reported adhesives (ASHAs) (≤7.5 MPa). VPTA adhesive joints can heal on their own after they have completely broken 20 times, while keeping resistances above 10 MPa, which is rarely reported.
In addition, this adhesive also features excellent solvent resistance, high durability and good creep resistance. The structural design strategy can serve as a versatile method for polymers, to prepare strong and efficient SHA.
Source: Journal of Materials Chemistry
