Effect of different carbon nano-fillers on rheological properties and lap shear strength of epoxy adhesive joints. (March 2016)

• Record Type: Journal Article
• Authors: Jojibabu, Panta; Jagannatham, M.; Haridoss, Prathap; Janaki Ram, G.D.; Deshpande, Abhijit P.; Bakshi, Srinivasa Rao
• Is Part Of: Composites. Volume 82(2016)
• Page Start: 53
• Page End: 64
• Publication Date: 2016-03
• Subjects: A. Particle-reinforcement -- B. Adhesion -- D. Mechanical testing -- E. Joints/joining; Composite materials -- Periodicals; Manufacturing processes -- Periodicals; Composite materials; Manufacturing processes; Periodicals; 620.11805
• DOI: 10.1016/j.compositesa.2015.12.003
• Languages: English
• ISSNs: 1359-835X

Abstract

Abstract: In this work, the rheological properties, thermal stability and the lap shear strength of epoxy adhesive joints reinforced with different carbon nano-fillers such as multi-walled carbon nanotubes (CNT), graphene nanoplatelets (GNP) and single-walled carbon nanohorns (CNH) have been studied. The nano-fillers were dispersed homogeneously using Brabender® Plasti-Corder®. The epoxy pre-polymer with and without the nano-fillers exhibited shear thinning behavior. The nano-filler epoxy mixtures exhibited a viscoplastic behavior which was analyzed using Casson's model. Thermo-gravimetric analysis indicated an increase in the thermal stability of the epoxy with the addition of carbon nano-fillers. Carbon nano-fillers resulted in increased lap shear strength having high Weibull modulus. The joint strength increased by 53%, 49% and 46% with the addition of 1 wt.% CNT, 0.5 wt.% GNP and 0.5 wt.% CNH, respectively. The strength of the joints having high filler content (>1 wt.%) was limited by mixed mode type of failure.