采用硅烷偶联剂对纳米Al2O3进行表面处理并在聚酰亚胺(Polyimide)基材表面制备出纳米氧化铝增强有机硅涂层.用热阴极灯丝放电产生的氧等离子体来模拟原子氧环境,研究了有机硅涂层的质量损失、表面形貌及化学成分的变化.结果表明,原子氧对聚酰亚胺基材剥蚀严重,质量损失线性增加,表面形成地毯状.经表面处理的纳米Al2O3微粒可以均匀分布在有机硅涂层中,具有良好的抗原子氧剥蚀性能.原子氧暴露后,其质量损失和微观表面形貌变化较小,当纳米Al2O3含量为2.5%时,试样的质量损失仅为聚酰亚胺的4.7%.
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