聚酰亚胺
材料科学
纳米颗粒
混合材料
化学工程
傅里叶变换红外光谱
聚合物
高折射率聚合物
折射率
溶胶凝胶
缩聚物
薄脆饼
纳米晶材料
高分子化学
复合材料
图层(电子)
纳米技术
光电子学
工程类
作者
Kajari Mazumder,Eva Bittrich,Brigitte Voit,Susanta Banerjee
出处
期刊:ACS omega
[American Chemical Society]
日期:2023-11-02
卷期号:8 (45): 43236-43242
标识
DOI:10.1021/acsomega.3c07151
摘要
High refractive index (RI) polyimide/titania nanoparticle hybrid materials were synthesized and characterized in this study. The polyimide synthesis took place via the conventional polycondensation process following the preparation of poly(amic acid), and the nanoparticles were incorporated using an in situ sol-gel process. Thin films of the polyimide/titania nanoparticle hybrids were prepared by optimizing the coating conditions using a spin coater. Thermal imidization of the nanoparticle containing poly(amic acid) films on Si wafers was completed in a temperature-controlled drying oven under a N2 atmosphere. Fourier transform infrared spectroscopy revealed the successful formation of inorganic bonds as well as imide linkages, and transmission electron microscopy results show well-dispersed nanocrystalline TiO2 nanoparticles of around 5 nm in the polymer matrix. Thorough optimization of the reaction time and concentration of TiO2 precursors enabled to achieve a titania content as high as 30% (wt). The RI of the resultant hybrid materials was found to be tunable according to the titania content, while the RI increased linearly with increasing titania content. A homogeneous hybrid material with a very high RI of 1.84 at 589 nm was achieved in this work for 30% (wt) TiO2.
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