为了使纤维(CF)表面的抗氧化性能更强,采用硅烷偶联剂KH560对SiO2溶胶进行改性,采用硅烷偶联剂KH550对CF进行改性,通过胺基与环氧基反应将SiO2溶胶接枝-涂覆到CF表面,形成致密的保护涂层.利用红外光谱(FTIR)、扫描电镜(SEM)及氧化失重等方法对涂膜试样表面的形貌及抗氧化性能进行表征.结果表明:CF表面接枝-涂覆SiO2,结合了涂覆和接枝的优点,涂层更加致密,其抗氧化性大于直接涂覆SiO2的涂层,更远大于没有涂覆而仅接枝SiO2的CF.
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