磷酸盐激光玻璃聚(CH3)2SiO/SiO2防潮膜改性研究

磷酸盐激光玻璃聚(CH₃)₂SiO/SiO₂防潮膜改性研究

摘要: 采用溶胶-凝胶方法制备的(CH3)2Si(OC2H5)2预聚体涂膜液中，掺入碱催化的SiO2悬胶体涂膜液，采用旋涂法在掺钕磷酸盐激光玻璃棒端面涂制了改性的防潮膜。当涂膜液中(CH3)2Si(OC2H5)2和SiO2物质的量之比为1∶1时，热处理后的膜层耐摩擦性能明显改善；表面粗糙度的均方根值为1.245 nm；膜层激光破坏阈值大于15 J/cm2(1 053 nm，1 ns)；在80 ℃和95%RH的封闭环境中静置336 h，膜层的透过率、接触角基本不变。结果证明膜层具有稳定的疏水结构和很好的防潮性能，膜层强度增加，耐磨擦能力提高，膜层使用期延长。

Abstract: Using di-ethoxy-silicane as precursor, a colloidal prepolymer was developed from sol-gel process. With silica colloid as modifier, the modified moisture-resistant films were prepared on neodymium-doped phosphate glass by spin coating. When the mole ratio of di-ethoxy-silicane to silica was 1∶1, the films after cure had improved abrasion-resistance. RMS was 1.245 nm, while laser-damage threshold value more than 15 J/cm2 at the condition of 1 053 nm, 1 ns. After staying in a closed circumstance at 80 ℃ and 95%RH, the films had approximately constant transmission and contact angle. It indicates that the films have a stable hydrophobic structure, good moisture-resistance, improved abrasion-resistant feature and longer service life.