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以钛酸了酯和聚乙烯吡咯烷酮（ＰＶＰ）为原料，采用ｓｏｌ－ｇｅｌ法制备Ｔ ＴＩＯ２／ＰＶＰ纳米复合材料。以原子力显微镜（ ＡＰＭ）和红外先谱等测试方法分别研究了薄膜的表面形貌和材料的结构。结果表明，薄膜表面非常光滑，高度差仅为２～５ｎｍ左右，在波数１０９５ｃｍ－１处的吸收谱带是由Ｔｉ－Ｏ的非对称伸缩振动所产生；同时研究了ＴｉＯ２／ＰＶＰ的介电常数和光致变色性能。
Tio2 / PVP nanocomposites were prepared by sol-gel method using titanate ester and polyvinylpyrrolidone (PVP) as raw materials. The surface morphology and material structure of the films were investigated by atomic force microscopy (AFM) and infrared spectrum analysis. The results show that the surface of the film is very smooth and the height difference is only about 2 ~ 5nm. The absorption band at the wave number of 1095cm-1 is caused by the asymmetric stretching vibration of Ti-O. At the same time, the dielectric constant of TiO2 / PVP And photochromic properties.