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自组装构筑聚苯胺多层膜及水溶性纳米CdS颗粒的研究
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摘要
本论文着重研究了PVP/PAn、PAA/PAn多层膜以及水溶性纳米CdS颗粒的自组装制备,主要内容如下:
     1.基于分子间的氢键作用利用层层自组装技术制备了PVP/PAn自组装多层膜,通过紫外-可见光谱、红外光谱、原子力显微镜、扫描电镜、X-射线反射光谱等手段对该自组装多层膜的组装过程、成膜驱动力、表面形貌、结构及膜厚作了详细探讨;
     2.在PAA和PAn分子间的氢键和静电引力共同作用下通过层层自组装技术成功制备了PAA/PAn自组多层膜,在自组装成膜的同时实现了对本征态聚苯胺的酸掺杂,采用紫外-可见光谱、红外光谱、原子力显微镜、扫描电镜、X-射线反射光谱等手段对该自组装膜的生长过程、成膜机理、表面形貌、结构及膜厚等进行分析表征:
     3.制备了油酸修饰的CdS纳米颗粒,然后利用β-环糊精与油酸基于分子识别作用自组装形成主-客体包合物的方法实现了对CdS纳米颗粒表面的修饰改性,获得了在中性水溶液中分散均匀、稳定性好的纳米CdS,通过红外光谱、X-射线衍射、原子力显微镜、紫外-可见光谱、荧光光谱仪、荧光显微镜等手段对该水溶性纳米CdS的制备进行了分析表征,初步研究了水溶性纳米CdS的相转移过程、β-环糊精的浓度对纳米CdS相转移过程的影响、水溶性纳米CdS颗粒的荧光性能等。
In this thesis, PVP/PAn and PAA/PAn multilayer films and water-soluble CdS nanoparticles had been fabricated through self-assembly technique. This thesis research work includes the following aspects:
     1. PVP/PAn self-assembly multilayer films had been fabricated through layer-by-layer self-assembly technique via H-bond interaction. The assembly process, the driving force for self-assembly, the surface appearance, the morphological structure and the thickness of the PVP/PAn multilayer films were characterized by ultraviolet spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), scanning electron microscope (SEM) and X-ray reflection (XRR).
     2. Multilayer films of PAA/PAn were successfully prepared by layer-by-layer self-assembly technique based on H-bond interaction and electrostatic attraction as driving force, PAn was doped in the preparation process of PAA/PAn multilayer films. The assembly process, the mechanism, the surface appearance, the structure and the thickness of the PAA/PAn multilayer films were also investigated by ultraviolet spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), scanning electron microscope (SEM) and X-ray reflection (XRR).
     3. Oleic acid (OA) capped CdS nanoparticles had been chemically prepared and the surface properties of CdS nanoparticles had been modified through the formation of an inclusion complex between oleic acid andβ-cyclodextrin (β-CDs) by self-assembly action based on molecular recognition. The modified CdS nanoparticles dispersed better in neutral water. The preparation of water-souble CdS nanoparticles were characterized by Fourier transform infrared (FTIR), X-ray diffraction(XRD), atomic force microscopy (AFM), ultraviolet spectroscopy (UV-Vis), fluorescence spectrometer(FL), fluorescence microscopy. The phase transfer process of CdS nanoparticles, the relation between nano CdS phase transfer efficiency and theβ-CDs concentration, the fluorescence performance of water-souble CdS nanoparticles had been simply discussed.
引文
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