宽带隙、高折射率聚偏四氟乙烯/TiO_2-ZrO_2光学膜的制备和表征(英文)

Preparation and Characterization of Polyvinylidene Fluoride/ZrO_2-TiO_2 Optical Film with Wide Band Gap and High Refractive Index

以氧氯化锆(ZrOCl2.8H2O)为锆源,钛酸丁酯(Ti(OBu)4)为钛源,聚偏氟乙烯(PVDF)为有机添加剂,采用溶胶–凝胶法在K9玻璃基片上制备PVDF/TiO2-ZrO2光学膜,提高了ZrO2-TiO2光学膜的综合性能。然后采用SEM、FT-IR、接触角以及紫外/可见/近红外透射光谱等手段对PVDF/TiO2-ZrO2光学膜的组成、光学性能和抗激光损伤阈值进行了研究。SEM测试表明,在K9玻璃基片上制备了光学膜。PVDF的添加导致水与薄膜的接触角增大。ZrO2-TiO2光学膜的光学带隙随ZrO2含量的增加而略微增大,PVDF/ZrO2(50mol%)-TiO2薄膜的光学带隙随PVDF质量分数的增加而增大。另外,ZrO2-TiO2光学膜的折射率随ZrO2摩尔分数的减小而增大,PVDF/ZrO2(50mol%)-TiO2膜的折射率随PVDF质量分数的增加而增大。

To improve the integrative properties of ZrO2-TiO2 optical film, polyvinylidene fluoride （PVDF）/ZrO2-TiO2 film was coated on the K9 glass substrate by Sol-Gel method using ZrOC12＂8H20 and Ti（OBu）4 as precursor of Zr and Ti, respectively. Using PVDF as organic additive, PVDF/ZrO2-TiO2 optical films were characterized by SEM, FT-IR and contact angle. Then the optical properties of the PVDF/ZrO2-TiO2 optical films were investigated via Ultraviolet/ Visible/Near Infrared transmission spectrum, optical band gap （Eg） and refractive index. SEM images indicate that the optical films are successfully prepared on the glass substrates. The addition of PVDF in the optical films increases the contact angle between water and the films. Eg of ZrO2-TiO2 optical films are slightly widened with the increasing of ZrO2 content, and Eg of PVDF/ZrO2（50mol%）-TiO2 films are widened as the mass fraction of PVDF increases. In addition, refractive indexes of ZrO2-TiO2 optical films increase as the mole fraction of ZrO2 decreases, and refractive indexes of PVDF/ZrO2（50mol%）-TiO2 films increase as the mass fraction of PVDF increases.