Preparation of MTMS modified glass fiber reinforced Al2O3–SiO2 aerogel composite for the laser irradiation protection

다국어 초록 (Multilingual Abstract)

Due to the significant photothermal damage caused by lasers, there is a need to explore new materials that possess excellent insulation and laser protection properties. In this study, the in situ solution gel method was employed to fabricate a methyltrimethoxysilane (MTMS) modified composite of glass fiber (GF) reinforced Al2O3–SiO2 aerogel. The laser protection capability of aerogel composites with varying ratios of Al/Si was investigated, while the laser ablation behavior of the materials was characterized using FESEM and FT-IR. The results indicate that the composite aerogel material with an Al/Si molar ratio of 3:1 exhibits a high damage threshold temperature and can withstand continuous laser exposure (3500 W/cm2) for 59 s. These findings suggest that Al2O3–SiO2 aerogel composites hold promising potential for applications in laser protection. The pore structure of the aerogel in the region affected by scattering damage is disrupted and appears black, emitting intense visible light upon laser irradiation. In the central ablative melting area, it is evident that the glass fiber and aerogel have undergone complete ablation and melting.