Abstract:Curved shallow crossing linking reinforcement was prepared from glass roving of 2400 tex on a 3D
weaving machine modeled SGA598. To improve interfacial properties between reinforcement and resin, the surface
treatment of the reinforcement was conducted by smearing the silane coupling agent KH-570 onto the surface of the
reinforcement and then dipping the reinforcement into the solution of KH-570. The resin matrix was composed of epoxy resin E51 and polyether amine WHR-H023 in a mass ratio of 1 1. The 3D curved shallow crossing linking woven
composite was then made from surface treatment reinforcement and resin matrix in a mass ratio of 1 by hand lay up
method. Fourier transform infrared spectrum(FT-IR), atomic force microscope(AFM), universal material testing ma
chine and scanning electron microscope(SEM) were used to characterized the treatment effect of KH-570 on reinforce
ment and the following composites. The results showed that after the treatment with surface鄄active agent KH-570, the
surface roughness and specific surface area of fibers in the reinforcement increased which in turn led to a tighter inte
gration between reinforcement and resin matrix; the bending properties of the 3D composites was enhanced with the
increase of the amount of KH-570; the main failure mode of the 3D composites performed as fracture of fibers rather than fibers pulling out of the resin matrix
