Synthesis and Characterization of Functional Nano Particles-Organic Hybrid Film

功能纳米颗粒-有机杂化材料作为一种新型的浸渍材料，受到了人们的广泛关注。选择BaTi03作为功能纳米粒子。(1)以有机钛醇盐和可聚合配体为原料，成功地合成了BaTi03(BT)前驱体。(2)确定了纳米BaTi03粒子的形成条件。在控制的反应条件下，对前驱体进行了水解和聚合。用红外光谱和核磁共振光谱对聚合过程进行了分析。研究了温度低于100℃时纳米Bt粒子的形成条件。用X射线衍射仪、扫描电子显微镜和能谱分析了有机基质中的晶态粒子。Bt颗粒-有机杂化透明膜的制备得到了Bt颗粒-有机杂化透明膜。由于量子尺寸效应，薄膜的吸收光谱发生了蓝移。杂化产物表现出显著的电流变效应，这与有机配体的种类有关。用光学显微镜证实了在电流变液中施加直流电压时，杂化材料中的纤维结构。建立了BT-有机杂化材料的制备条件与其新颖的介电性能和光学性能之间的关系。

Functional nano particle-organic hybrid has been receiving great attention as a newly imerging material. BaTi03 was selected as a functional nano particle.(1)BaTi03(BT) precursor was successfully synthesized from barium-organic and titanium alkoxide and a polymerizable ligand.(2) The formation conditions of nano-crystalline BaTi03 particles were established. The precursor was hydrolyzed and polymerized under the controlled reaction conditions. The polymerization process was analyzed by IR and NMR spectroscopy. The formation conditions of nano-sized BT particles below 100 C were investigated. The crystalline particles in the organic matrix were analyzed by XRD,SAD and EDX. The particle size was found to depend upon the polymerization and hydrolysis conditions.(3) Transparent films of BT particle-organic hybrid were synthesized. The absorption spectra of films revealed a blue-shift due to quantum size effect. The hybrid showed a prominent electro-rheological effect depending upon the kind of organic ligands. The fibril structure of hybrid in the ER fluid during applying DC voltage was confirmed by optical microscope. The relation between the processing conditions of BT-organic hybrid and its novel dielectric and optical properties has been established.