pH诱导调节聚联苯胺亚微米棒的形态与性能  

pH induced regulation of the morphology and properties of polybenzidine submicron rods

作　　者：王琳[1,2] 张艳慧[1,2] 阿孜古丽.木尔赛力木[1,2] 阿比旦.阿布都乃则尔[1,2] 兰海蝶[1,2] WANG Lin;ZHANG Yan-hui;Arzugul MUSLIM;Abida ABDUNAZAR;LAN Hai-die(School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi 830054, China;Engineering Research Center of Electrochemical Technology and Application, Xinjiang Normal University, Urumqi 830054, China)

机构地区：[1]新疆师范大学化学化工学院,乌鲁木齐830054 [2]新疆师范大学电化学技术与应用工程研究中心,乌鲁木齐830054

出　　处：《华东师范大学学报（自然科学版）》2019年第2期164-173,共10页Journal of East China Normal University(Natural Science)

基　　金：国家自然科学基金(51763023);新疆师范大学校级科研平台招标课题(XJNUGCZX122017A03)

摘　　要：以三嵌段共聚物聚丙烯酸正丁酯-b-聚苯乙烯-b-聚二乙烯基吡啶(PnBA_(28)-b-PS_(75)-bP2VP_(104))为模板剂制备聚联苯胺,通过调节模板剂胶束溶液的pH值,探究不同pH值对聚联苯胺(PBZ)颗粒形貌及其性能的影响.利用凝胶渗透色谱(SEC)和核磁共振氢谱图(~1HNMR)等测试对三嵌段共聚物PnBA_(28)-b-PS_(75)-b-P2VP_(104)的分子量分布、结构进行了确定.通过扫描微镜(SEM)、透射电镜(TEM)和红外光谱(FT-IR)等测试对材料的形貌、结构进行了表征.利用计时电位测试对材料进行了电化学电容性能的评价.初步探讨了使用不同pH值的模板剂、相同引发剂用量对PBZ形貌、结构和性能的影响.PBZ颗粒呈亚微米级至微米级棒状形貌,分布均匀、表面光滑.pH值为5时,PBZ棒状颗粒的直径大多在几十纳米到200nm之间,随着pH值的增大,样品形貌规整性降低;通过电化学测试可知,pH值为5时PBZ的放电比容量达到339.06 F/g.Polybenzidine was prepared using micelles of the triblock copolymer PnBA28-b-PS75-b-P2 VP104 as a template. The effects of different pH values on the morphology and properties of polybenzidine(PBZ) were investigated by regulating the pH value of the micellar solution of the templates. The molecular weight distribution and structure of the triblock copolymer PnBA28-b-PS75-b-P2 VP104 were determined by size exclusion chromatography(SEC) and nuclear magnetic resonance spectroscopy(1 H-NMR). The morphology and structure of the composites were characterized using a scanning electron microscope(SEM), transmission electron microscope(TEM), and Fourier transform infrared spectroscopy(FT-IR). The electrochemical capacitance of the composites was evaluated by chronopotentiometry. The effects of the pH value on the morphology,structure and properties of PBZ were explored in this study. The PBZ particles were submicron and micron rods with uniform distribution and a smooth surface. PBZ rods obtained at pH=5 had an average diameter that ranged from several tens to 200 nm. The uniformity of particle morphologies was found to decrease with an increase in pH value;A electrochemical performance test showed that the specific capacitance of PBZ reached339.06 F/g at pH=5.

关 键 词：pH诱导调节 聚联苯胺 嵌段共聚物模板 形貌 电容特性 

分 类 号：O631.1[理学—高分子化学]