【作者】 程云涛；

【导师】 翁家宝； 孙建平；

【作者基本信息】 福建师范大学 ， 物理化学， 2008， 硕士

【摘要】 聚合物基无机纳米复合材料不仅具有纳米材料的表面效应和量子尺寸效应,而且将无机物的刚性、尺寸稳定性和热稳定性与聚合物的韧性、加工性及介电性能揉合在一起,从而产生许多特异的性能,在电子学、光学、机械学、生物学等领域展现出广阔的应用前景。本论文首先对纳米TiO₂进行表面改性处理,然后通过原位聚合法和反胶束微乳液聚合法成功的合成了PANI/TiO₂纳米复合材料,通过强碱诱导下的脱氯化氢聚合法合成了PMOCOPV/TiO₂复合材料,运用IR、XRD、TG、DSC、TEM、Raman、SEM、Uv-Vis、元素分析等各种仪器对复合材料进行了结构表征,并对材料的性能进行了研究,结果表明:经表面改性后的纳米TiO₂能较好的分散在PANI和PMOCOPV中;溶液法合成的PANI/TiO₂和PMOCOPV/TiO₂复合材料是具有核壳结构的的复合粒子,在反胶束微乳液法中得到纳米棒状的PANI/TiO₂复合材料,掺杂纳米TiO₂后复合材料热稳定性均得到增强。分别对PANI、PMOCOPV及PANI/TiO₂,PMOCOPV/TiO₂等复合材料进行荧光光谱分析。结果表明:PANI/TiO₂复合材料的发光强度随着TiO₂含量的增加得到较大加强;PMOCOPV/TiO₂纳米复合材料的最大发射波长随着TiO₂含量的增加发生红移,荧光寿命约为1ns,且随着TiO₂含量的增加荧光强度和荧光寿命得到显著提高,最后初步探讨了纳米TiO₂与PMOCOPV复合的发光机理。更多还原

【Abstract】 Conjugated polymer/inorganic nano-composites not only have nano materials’ surface effect and quantum dimension effect,but also integrate inorganic rigidity, dimensional stability and heat stability,with polymer’s tenacity,processability and dielectric property.So nano-composites form some characteristic performance.It will be of fundamental and practical significance on Electronics,Optics,Mechanics and Biology.In this thesis,nanometer TiO₂ was treated with surface coating at first. Nano-composites of PANI/TiO₂ were synthesized by in-situ chemical oxidation polymerization method and reverse micelle microemulsion method.PMOCOPV/TiO₂ were synthesized successfully by dehydrochlorination reaction.The structure and properties of nano-composites were investigated by IR,XRD,TG,DSC,TEM,Raman, SEM,Uv-Vis and elemental analysis.The result indicated that PANI and PMOCOPV was coated on the surface of TiO₂,formed dispersion uniformly and possessed core-shell structure’s nano-composites by in-situ chemical oxidation polymerization method.But PANI/TiO₂ form stick structure’s nano-composites in reverse micelle microemulsion. Heat stability of nano-composites strengthened while adulterating TiO₂.Photoluminescence spectroscopy indicates that the intensity of PANI/TiO₂ nano-composi-te’s fluorescence strengthened with the amount of adulterating TiO₂.The maximum emission wavelength of the PMOCOPV/TiO₂ is red-shifted with increasing TiO₂ concentration.The fluorescence lifetime of PMOCOPV/TiO₂ is about 1 ns.The intensity and lifetime of fluorescence is increased remarkably with the contents of TiO₂ increasing.更多还原