【摘要】 以氯化镉和硫化钠为原料,采用巯基乙醇为有机配体,在H2O/DMF的溶剂中,制得分散均匀且表面富含羟基基团CdS纳米晶溶液。我们使用γ-甲基丙烯氧丙基三甲氧基硅烷(MPS)来修饰CdS纳米晶的表面,得到双键官能团化的CdS纳米晶。通过原位自由基聚合方法,成功地得到了聚苯乙烯基CdS纳米晶复合材料。利用傅里叶红外光谱仪(FT-IR)、透射电子显微镜(TEM)、紫外-可见光吸收光谱仪(UV-vis)、X射线衍射分析仪(XRD)、热重分析仪(TGA)、荧光光谱(PL)考察了CdS纳米晶及CdS/聚苯乙烯复合材料的结构和光学性能的关系规律。结果表明巯基乙醇表现出良好的光学性能,其配体不是简单的物理吸附于纳米晶表面,而是以化学键的形式和纳米晶表面镉原子相结合。相比于纯的聚苯乙烯材料,聚苯乙烯基CdS纳米晶材料表现出良好的光学和热学性能。更多还原

【Abstract】 In this paper,cadmium chloride(CdCl2) and sodium sulfide(Na2S) were employed as the raw materials to fabricate hydroxyl coated CdS nanocrystals in the presence of 2-mercaptoethanol(ME) as organic ligand.We used methacryloxypropyltrimethoxysilane(MPS) to further functionalize CdS nanocrystals and allow them to contain double bonds.Therefore we successfully obtained CdS/PS nanocomposite hybrids via free radical polymerization in situ.The structure and optical properties of CdS nanocrystal and CdS/PS nanocomposite hybrids were investigated by Fourier transform infrared spectroscopy(FT-IR),transmission electron microscopy(TEM),UV-vis absorption spectrum(UV-vis),X-ray diffraction(XRD),thermogravimetric analyses(TGA) and photoluminescence spectrum(PL),respectively.The results indicate that as-prepared CdS nanocrystals behave good photoluminescence properties and the formation of robust bonding between CdS nanocrystals and the organic ligand occurs in this case.It is also shown that CdS/PS nanocomposite hybrids exhibit good optic and thermal properties compared with pure PS polymer.更多还原