Abstract: A method for enhancing fracture toughness of a composite laminate is disclosed. The method includes fabricating a nanofiber yarn, forming a nanofiber yarn layer by aligning the nanofiber yarn in form of a layer, forming a laminated structure by interleaving the nanofiber yarn layer into a plurality of fabric layers, forming the composite laminate by subjecting the laminated structure to a vacuum infusion process (VIP), and curing the composite laminate. Forming the laminated structure includes stacking a plurality of fabric layers onto each other and placing the nanofiber yarn layer between two fabric layers of the plurality of fabric layers. The VIP includes forming a sealed laminated structure by sealing the laminated structure, forming a vacuumed laminated structure by vacuuming the sealed laminated structure, and introducing a resin matrix into the vacuumed laminated structure.

Abstract: A method for enhancing fracture toughness of a composite laminate is disclosed. The method includes fabricating a nanofiber yarn, forming a nanofiber yarn layer by aligning the nanofiber yarn in form of a layer, forming a laminated structure by interleaving the nanofiber yarn layer into a plurality of fabric layers, forming the composite laminate by subjecting the laminated structure to a vacuum infusion process (VIP), and curing the composite laminate. Forming the laminated structure includes stacking a plurality of fabric layers onto each other and placing the nanofiber yarn layer between two fabric layers of the plurality of fabric layers. The VIP includes forming a sealed laminated structure by sealing the laminated structure, forming a vacuumed laminated structure by vacuuming the sealed laminated structure, and introducing a resin matrix into the vacuumed laminated structure.

Abstract: The disclosed method presents a method of fabrication of wrapped multi-scale nano-to-micro fibrous structures near-similar to extracellular matrix (ECM) structure. The resulting materials finely mingle nano-scale fibers on micro-scale fibers to form a composite structure with defined responsibility of each fiber category for diffident application including soft-tissue engineering. This composite-like structure of the fibrous material may be helpful in cell differential regulation when different cell types are necessary in a tissue. This hierarchically structure of nanofibers, as a cell-adhesive matrix, on the micro-scale fibers, as an elastomeric structural component, present a favorable structure most similar to the natural ECM and therefor acts as a growth factors for recruitment and cell proliferation within the structure.