Synthesis and characterization of novel eco-epoxy adhesives based on the modified tannic acid for self-healing joints

The aim of this research was to investigate the self-healing potential damaged Al joints when bonded using novel eco-epoxide adhesives derived from tannic acid (TA). Two eco-epoxy components based on TA, (A) glycidyl ether and (B) phosphate ester were produced. effect ability assessed in terms energy dissipation recovery after partial failure a double cantilever beam (DCB) test, which compared reference epoxy (R). process required 2 h bars an autoclave at 180 °C. Techniques such as DSC, FTIR DMA showed residual activity capability used adhesives. A combination two monitoring techniques, Digital Image Correlation (DIC) Acoustic Emission (AE), monitor strain distribution damage propagation DCB specimens. healing index for R, B found be 8.9%, 3.0%, 82.5% respectively. findings work highlighted bio-based structural adhesive bonding, well prospect utilizing their restore strength parts.