Print Email Facebook Twitter Synthesis and characterization of novel eco-epoxy adhesives based on the modified tannic acid for self-healing joints Title Synthesis and characterization of novel eco-epoxy adhesives based on the modified tannic acid for self-healing joints Author Tomić, Nataša Z. (University of Belgrade) Saeedifar, M. (TU Delft Structural Integrity & Composites) Saleh, M. (TU Delft Aerospace Structures & Computational Mechanics; Technology Innovation Institute) Marinković, Aleksandar (University of Belgrade) Zarouchas, D. (TU Delft Structural Integrity & Composites) Teixeira De Freitas, S. (TU Delft Structural Integrity & Composites) Date 2022 Abstract The aim of this research was to investigate the self-healing potential of 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) glycidyl phosphate ester of TA, were produced. The effect of the eco-epoxy components on the self-healing ability was assessed in terms of the energy dissipation recovery after partial failure in a double cantilever beam (DCB) test, which was compared to the reference epoxy (R). The self-healing process required 2 h and 2 bars in an autoclave at 180 °C. Techniques such as DSC, FTIR and DMA showed residual activity and potential self-healing capability of the used adhesives. A combination of two monitoring techniques, Digital Image Correlation (DIC) and Acoustic Emission (AE), was used to monitor the strain distribution and damage propagation in the DCB specimens. The healing index for adhesives R, B and A was found to be 8.9%, 3.0%, and 82.5% respectively. The findings of this work highlighted the potential of using bio-based epoxy adhesives in structural adhesive bonding, as well as the prospect of utilizing their self-healing ability to restore the strength of such bonded parts. Subject Acoustic emissionAdhesionEco-epoxySelf-healingTannic acid To reference this document use: http://resolver.tudelft.nl/uuid:9f1f82a5-e310-406b-a63d-ef51ea4c23c1 DOI https://doi.org/10.1016/j.polymertesting.2021.107444 ISSN 0142-9418 Source Polymer Testing, 106 Part of collection Institutional Repository Document type journal article Rights © 2022 Nataša Z. Tomić, M. Saeedifar, M. Saleh, Aleksandar Marinković, D. Zarouchas, S. Teixeira De Freitas Files PDF 1_s2.0_S0142941821003871_main.pdf 13.57 MB Close viewer /islandora/object/uuid:9f1f82a5-e310-406b-a63d-ef51ea4c23c1/datastream/OBJ/view