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Monisha Baby,Vijayalakshmi K. Periya,Bhuvaneshwari Soundiraraju,Nisha Balachandran,Suchithra Cheriyan,Santhosh K. Sankaranarayanan,Satheesh Chandran Maniyeri 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.100 No.-
Thermoplastic materials like High Density Polyethylene (HDPE) and Polytetrafluoroethylene (PTFE) arepromising candidates for specialty industry/aerospace sectors considering their exceptional propertiesand lower densities. However, the low surface energy leading to poor wetting and reduced adhesioncurtails the scope of their wide-spread usage. In this work, we report adhesion promoter primers basedon epoxy–catechol with and withoutfluorinated polymer and investigated their adhesion promotionefficiency on low/high surface energy substrates. The rational design of catechol-fluorine-epoxy hybridnetwork, mimicking mussel chemistry enabled a non-destructive surface activating approach resultingin profound adhesion promotion. Thefluorine containing primer could effectively enhance adhesionbetween homo and hetero interfaces of Aluminium/HDPE/PTFE owing to the good interface interactionand could outperform common etching methods. A series of molecular level characterizations togetherwith computational and AFM studies provided evidences for the high degree of interaction of the primerbetween the substrates and epoxy-based adhesives. Bond integrity endurance test using a weight of 10and 20 kg resulted in ‘no fail’ categorization for the primed substrates during the entire 40 days testduration. The catechol-functionalized primers reported here can be a good overreaching approach tokeep non-polar substrates afloat in advanced sectors.