含苯胺四聚体的嵌段共聚物合成及对碳纳米管的修饰-高分子化学与物理专业论文.docxVIP

华 华 中 科 技 大 学 硕 士 学 位 论 文 II II Abstract As one of the most important conducting polymers, polyaniline (PANI) has attracted much attention because of its excellent properties, such as ease of synthesis, environmental stability, and unique acid/base doping/dedoping behavior and reversible oxidation/reduction chemistry. In recent years, oligoanilines have been studied as model compounds for PANI, not only for the similar electroactivity as PANI, but also for their good solubility and well-defined structure. In this thesis, a series of electroactive diblock copolymers containing tetraaniline, tetraaniline-b-methoxypolyethylene glycols (TANI-mPEGs (Mn, PEG = 2000, 1000, 750)), were successfully synthesized by coupling TANI and mPEGs with succinic anhydride. Their electroactive properties, crystallization behavior, intramolecular/ intermolecular interaction and self-assembly behaviors of diblock copolymers on the surface of carbon nanotube (CNT) were investigated. UV-vis results indicated that their intrinsic electroactivety was maintained, and the copolymer could also been doped by HCl in DMF. DSC and POM results showed that only TANI-mPEG2000 still exhibited crystallization behavior, while its crystallinity decreased severely. The glass transition temperatures decreased with the increasing length of mPEG segment. Spacial confinement and chain confinement were also found for TANI/mPEG blends and TANI-mPEG block copolymers. FT-IR spectra demonstrated the existence of hydrogen bond between TANI and mPEG. When CNTs were sonicated with mPEO-PANI in NMP, TANI segments were attached to the surface of CNTs, and core-shell structures with CNT as a core and diblock copolymer as a shell were obtained, which could be well dispersed in NMP and DMF. The similar structures were obtained via selective solvent method. Only if the thickness of shell was thick enough, CNTs should disperse well in water. Keywords: polyaniline, tetraaniline, block copolymer, carbon nanotube III III 目录 摘