1 research outputs found
Ordered Silica Nanoparticles Grown on a Three-Dimensional Carbon Fiber Architecture Substrate with Siliconborocarbonitride Ceramic as a Thermal Barrier Coating
Hierarchical structure consisting
of ordered silica nanoparticles grown onto carbon fiber (CF) has been
fabricated to improve the interfacial properties between the CFs and
polymer matrix. To improve the reactivity of CFs, their surface was
modified using polyÂ(1,4-phenylene diisocyanate) (PPDI) via in situ
polymerization, which also resulted in the distribution of numerous
isocyanate groups on the surface of CFs. Silica nanoparticles were
modified on the interface of CF-PPDI by chemical grafting method.
The microstructure, chemical composition, and interfacial properties
of CFs with ordered silica nanoparticles were comprehensively investigated
by scanning electron microscopy, X-ray photoelectron spectroscopy,
and Fourier transform infrared spectroscopy. Results indicated an
obvious increase in the interfacial shear strength, compared to that
of CF precursor, which was attributed to silica nanoparticles interacting
with the epoxy resin. Furthermore, siliconborocarbonitride (SiBCN)
ceramic was used as thermal barrier coating to enhance 3D CF architecture
substrate antioxidant and ablation properties. Thermogravimetric results
show that the thermal stability of the CF with SiBCN ceramic layer
has a marked increase at high temperature