东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

聚苯胺内方形微米管和方形微米棒的可控制备和结构

ISSN号：1000-3304
期刊名称：《高分子学报》
时间：0
分类：TQ174.1[化学工程—陶瓷工业;化学工程—硅酸盐工业] TB383[一般工业技术—材料科学与工程]
作者机构：[1]中国矿业大学化学与环境工程学院,北京100083, [2]中国科学院化学研究所有机固体实验室,北京100190
相关基金：国家自然科学基金（基金号50533030;20125102）和王宽诚博士后工作奖励基金资助项目;

作者：李久明[1,2], 朱英[2], 解强[1], 万梅香[2], 江雷[2]

关键词：聚苯胺, 聚氮烷, 内方形微米管, 微米方形棒, 氧化聚合, Polyaniline,Polyazane,Microtubes with inner square cross-section,Microbars with square cross-section,Self-assembly process

中文摘要：

以柠檬酸为掺杂剂、过硫酸铵为氧化剂,通过改变苯胺单体的浓度实现了聚苯胺微/纳米结构的可控的自组装制备.在较高苯胺单体浓度时,自组装得到具有内方形的导电态聚苯胺微米管,其直径约为580-300nm,管壁厚约为80 nm.而在极稀的苯胺单体浓度时,自组装得到正方形横截面的方形微米棒,其横截面的边长约为690-290 nm,长度约为1-40μm.结构表征结果证明,所得的微米方形棒是N—N单键结合的聚氮烷;而延长聚合反应时间,则可得到本征态聚苯胺微米管.

英文摘要：

Controlled micro/nanostructures of polyaniline（PANI）were obtained through a chemical oxidative polymerization by changing the concentration of aniline monomer in the presence of citric acid as dopant.It was found that conducting PANI microtubes with square inner cross-section（580～300 nm in diameter and 80 nm in wall thickness） were obtained at a relatively high aniline concentration.When the solution was sufficiently dilute,the polyazane microbars with square cross-section（690～290 nm in side length and 1～40 μm in length） can be made by self-assembly.Structural characterizations of the microbars with square cross-section showed that aniline polymerized product by this method was a new material containing N—N single bonds rather than PANI,which was defined as polyazane by A.G.MacDiarmid.The aniline/citric acid salts are proposed as the templates in the formation of the microtubes with square inner cross-section and microbars with square cross-section based on XRD and SEM measurements.Interestingly,it was found that morphology and molecular structure of the microbars were strongly affected by the reaction time and the concentration of aniline.The molecular structure of the microbars with square cross-section was changed from polyazane to PANI,for instance,when the reaction time increased from 5 h to 168 h.Moreover,the microbars with square cross-section were varied from solid to hollow with square cross-section and which was accompanied by a molecular structural change from polyazane to conductive PANI when the concentration of aniline increased by one order of magnitude（from 1.75×10^-2 to 1.75×10^-1mol/L）.