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<p>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 SiB<sub>6</sub>/SiO<sub>2</sub> 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 SiB<sub>6</sub>/SiO<sub>2</sub> mixed modification on the mechanical properties of phenolic resin matrix composites was evaluated through mechanical testing. The experimeatal results indicate that the SiB<sub>6</sub>/SiO<sub>2</sub> mixed surface modification shows significant improvement in strength at room temperature and high temperatures, and crystallization temperature of silica fiber increases. The SiB<sub>6</sub>/Silica sol co-modified silica fiber shows potential for future application in thermal protection and other high-temperature conditions.</p>

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

  • 期刊论文

  • 发表日期：

    2025年4月14日

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  • Jie Ding,
  • Jinzhe Duan,
  • Xizhuo Yan,
  • Minxian Shi,
  • Zhixiong Huang,
  • Haibo Yan,
  • Qingke Wang,
  • Kai Li

摘要

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.