Hybrid fiber tows containning both nano-fillers and continuous fibers, hybrid composites, and their production processes
a technology of hybrid fibers and nano-fillers, applied in the field of hybrid fiber tows, can solve the problems of poor delamination resistance, poor thickness-direction and shear strength and moduli of continuous carbon fiber reinforced polymer composite laminates, and excellent in-plane properties of composite materials
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[0020]The conventional approach to fabricating composite materials containing both continuous fibers and fillers (such as nanoscale fillers, short fibers, etc.) typically involves mixing the fillers with a resin first, followed by impregnating the continuous fiber tows with the resin / filler mixture. It is now well-recognized that a small amount of nano-fillers like carbon nano-tubes (CNTs) and carbon nano-fibers (CNFs) could dramatically increase the viscosity of a matrix resin. The resulting nano-filler / resin mixture is typically so viscous that it becomes extremely difficult to disperse continuous fibers in this matrix. Hence, it is also commonly believed that only a small amount of nano-fillers can be incorporated in a hybrid composite.
[0021]Furthermore, the prior-art sequence of mixing nano-fillers with a resin and then impregnating continuous fibers with the nano-filler / resin mixture tends to produce a hybrid composite with fillers oriented along the continuous fiber axis. Such...
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