Interfacial polymerization of morphologically modified polyaniline: from hollow microspheres to nanowires |
| |
Authors: | Jinbo Li Qingming Jia Jiewu Zhu Maosheng Zheng |
| |
Affiliation: | 1. School of Material Science & Engineering, Xi'an Jiaotong University, Xi'an 710049, China;2. Department of Science and Technology, Xi'an Shiyou University, Xi'an 710065, China;3. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650224, China |
| |
Abstract: | BACKGROUND: Polyaniline (PANI) has attracted much attention in many fields due to its chemical and physical properties, and different nanostructures of PANI changing from one‐dimensional to three‐dimensional have been obtained. By changing the concentration of cetyltrimethylammonium bromide (CTAB), the morphology of hydrochloric acid‐doped polyaniline could be changed from one‐dimensional nanoneedles or nanowires with a network structure (50–100 nm in diameter) to three‐dimensional hollow microspheres (ca 400 nm in outer diameter) via combining interfacial polymerization and self‐assembly process. RESULTS These different nanostructures of PANI were proved using scanning electron and transmission electron microscopies. A plausible mechanism of the formation of the changeable nanostructures of PANI may be different from that of interfacial polymerization without surfactant or a traditional homogenous reaction system using CTAB as surfactant. CONCLUSION The results obtained from Fourier transform infrared spectrometry, X‐ray diffraction and the four‐probe method showed that the molecular structure of PANI does not change with increasing CTAB concentration, but crystallinity and conductivity of PANI increase with surfactant concentration. Copyright © 2007 Society of Chemical Industry |
| |
Keywords: | polyaniline interfacial polymerization self‐assembly morphology |
|
|