Exploitation of rubbery electrospun nanofibrous mat for fracture toughness improvement of structural epoxy adhesive bonded joints

The improvement of the fracture toughness adhesive joints is a key factor in many structural applications. ability nylon electrospun nanofibrous mat to act as an carrier and reinforcing web bonding has been demonstrated by Authors previous works. It shown that impregnation method developed refined during studies allow generating high-quality pre-preg nanomats out 2k unfilled epoxy resin. By applying this methodology, present work, rubbery mats have adopted for first time reinforce increase joints. Rubbery nanofibers were produced electrospinning nitrile butadiene rubber (NBR) poly(ε-caprolactone) (PCL). addition semi-crystalline polymer (PCL) exploited maintain morphology, which alone would not be able ensure due its low glass transition temperature (Tg). thus obtained integrated into two-component high strength resin S235 steel adherends Double Cantilever Beam (DCB) tests manufactured sandblasted improve adhesion. An optimization sandblasting parameters (distance, pressure, angle time) carried evaluating shear surfaces on Single Lap Joints (SLJ). Finally, DCB performed compare mode I with without nanomats.