An original method to increase the mechanical strength of adhesively joined carbon fiber-reinforced plastics (CFRPs) and honeycomb CFRP sandwich structures by etching is proposed, based on sulfuric acid etching of the CFRP surface. Etched composites are joined by a novel phenolic resin-based adhesive and are cured, and their cross section is observed by FESEM. Etching of CFRP was aimed to obtain a “brush”-like composite to be infiltrated by the adhesive, giving a fiber-reinforced, stronger composite joint. This method gave a 100% increase in the lap shear strength for the adhesively joined etched CFRP, compared to the non-etched ones.

Etching of carbon fiber-reinforced plastics to increase their joint strength / De La Pierre, S.; Giglia, V.; Sangermano, M.; Cornillon, L.; Damiano, O.; Ferraris, M.. - In: JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE. - ISSN 1059-9495. - ELETTRONICO. - 29:(2020), pp. 242-250. [10.1007/s11665-020-04576-5]

Etching of carbon fiber-reinforced plastics to increase their joint strength

De La Pierre S.;Sangermano M.;Ferraris M.
2020

Abstract

An original method to increase the mechanical strength of adhesively joined carbon fiber-reinforced plastics (CFRPs) and honeycomb CFRP sandwich structures by etching is proposed, based on sulfuric acid etching of the CFRP surface. Etched composites are joined by a novel phenolic resin-based adhesive and are cured, and their cross section is observed by FESEM. Etching of CFRP was aimed to obtain a “brush”-like composite to be infiltrated by the adhesive, giving a fiber-reinforced, stronger composite joint. This method gave a 100% increase in the lap shear strength for the adhesively joined etched CFRP, compared to the non-etched ones.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2789912