No abstract

This work demonstrates a facile route to the synthesis of large quantities of uniform polyaniline-sodium alginate (PANI-SA) nanofibers template-guided by SA. This approach is an easy, inexpensive, environmentally friendly, and scalable one-step method to produce uniform nanofibers with controllable average diameters in bulk quantities. We started with biopolymer-monomer complexes formed between the carboxylic groups of SA and the amino group of an organic monomer (aniline). When ammonium persulfate was added, such polymer-monomer complexes could be polymerized. Then, polyaniline-sodium alginate nanofibers with uniform diameters from 40 to 100 nm were successfully obtained in a high yield. The resultant PANI-SA nanofibers were characterized by means of different techniques, such as ultraviolet-visible spectroscopy, thermogravimetric analysis, wide-angle X-ray diffraction, Fourier transform infrared spectroscopy, and scanning and transmission electron microscopy methods. The mechanism governing the formation of the polyaniline-sodium alginate nanofibers is discussed.

Conducting polyaniline (PANI)/titanium dioxide (TiO 2 ) composite nanofibres with an average diameter of 80-100 nm were prepared by one-step in situ polymerization method in the presence of anatase nano-TiO 2 particles, and were characterized via Fourier-transform infrared spectra, UV/vis spectra, wide-angle X-ray diffraction, thermogravimetric analysis, and transmission electron microscopy, as well as conductivity and cyclic voltammetry. The formation mechanism of PANI/TiO 2 composite nanofibres was also discussed. This composite contained $ 65% conducting PANI by mass, with a conductivity of 1.42 S cm À1 at 258C, and the conductivity of control PANI was 2.4 S cm À1 at 258C.

No abstract

No abstract