摘要
采用简单的化学氧化聚合直接合成吡咯-苯胺（Py-An）共聚物亚微米颗粒.所得共聚物的产率和电导率受聚合条件如共单体配比、聚合温度和氧单比的影响.当n（Py）/n（An）=7/3,氧单比为1,共聚温度为20℃时,共聚物具有相对较高的产率（57.5%）和电导率（2.61S/cm）.红外光谱（FT-IR）的分析结果表明,共聚物分子链由吡咯和苯胺链段构成,并随着共单体配比的不同而变化.扫描电镜（SEM）显示Py-An （7/3）共聚物呈现亚微米尺度的无规则颗粒状形貌,粒径约300-500nm.相对均聚物来说,Py-An（7/3）共聚物显示出更好的溶解性和赝电容特性.循环伏安（CV）的研究表明Py-An（7/3）共聚物的质量比电容为256F/g,且1000次循环后仍能保持初始比电容的97.6%.
Pyrrole-aniline(Py-An)copolymer sub-micron particles were directly and productively synthesized by a facile chemical oxidative polymerization of pyrrole and aniline.The polymerization yield and electrical conductivity of the copolymer are significantly influenced by the comonomer ratio,polymerization temperature and oxidant/monomer molar ratio.When the copolymerization conditions was at a Py/An molar ratio of 7/3,an oxidant/monomer molar ratio of 1,and a temperature of 20 ℃,the obtained copolymer has relatively high yield(57.5%)and conductivity(2.61S/cm).FTIR indicates that the copolymer chains are composed of polypyrrole and polyaniline segments,and the composition changes according to Py/An molar ratio.Py-An(7/3)copolymer is found to generally have sub-micron scale irregular granular morphology with the particle size of 300-500 nm by SEM.Compared to the homopolymer,Py-An(7/3)copolymer exhibits better solubility and pseudocapacitance performance.The results of cyclic voltammetry(CV)test show that the Py-An(7/3)copolymer possesses a specific capacitance of 256F/g as well as retains 97.6% of the initial specific capacitance after 1 000 cycles.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2015年第14期14038-14042,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(21204072)
关键词
吡咯
苯胺
共聚物
亚微米颗粒
超电容
pyrrole
aniline
copolymer
sub-micron particle
super-capacitance
