Effect of Silica Fiber and Its Composite Properties by SiB₆/SiO₂ Mixed Surface Modification

Abstract

Silica fibers were modified by a specific ratio of SiB6 mixed with silica sol through vacuum impregnation method. The modified fibers were then incorporated into a phenolic resin matrix to prepare fiber-reinforced resin composites. The influences of the SiB₆/SiO₂ mixed modification on silica fiber properties were analyzed through thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and X-ray diffraction (XRD), respectively. Additionally, the influence of the SiB₆/SiO₂ mixed modification on the mechanical properties of phenolic resin matrix composites was evaluated through mechanical testing. The experimeatal results indicate that the SiB₆/SiO₂ mixed surface modification shows significant improvement in strength at room temperature and high temperatures, and crystallization temperature of silica fiber increases. The SiB₆/Silica sol co-modified silica fiber shows potential for future application in thermal protection and other high-temperature conditions.

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Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature