Enhancement of electrical properties of metal doped polyaniline synthesized by different doping techniques
- PDF / 1,736,137 Bytes
- 19 Pages / 439.37 x 666.142 pts Page_size
- 83 Downloads / 201 Views
Enhancement of electrical properties of metal doped polyaniline synthesized by different doping techniques Md. Mostafizur Rahman1 · Tanvir Mahtab1 · M. Zobayer Bin Mukhlish1 · M. O. Faruk2 · Mohammed Mastabur Rahman1 Received: 28 April 2020 / Revised: 13 August 2020 / Accepted: 24 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Metal doped polyaniline (PANI) was synthesized following chemical oxidative polymerization method in acidic medium followed by two different doping techniques i.e. doping during polymerization and doping after polymerization of aniline. Three dopant materials ZnCl2, MgCl2, and CuCl2 were used in this synthesis. In first case, metal salts with various compositions were added with aniline and the polymerization results synthesized metal doped PANI. In second case, PANI was synthesized first and then dopant materials were added to prepare metal doped PANI. The synthesized PANI was characterized on the basis of electrical properties (conductivity and capacitance), and the effects of dopants and doping techniques were studied. It was found that the electrical conductivity was increased with increasing the dopants concentration in both of the doping techniques. The test results also showed that the samples prepared with doping after polymerization exhibited higher electrical conductivity compared to that of the samples doped during polymerization. CuCl2 was found to be the best dopant materials for the PANI on the basis of electrical conductivity. The sample coming from Cu doped with PANI during polymerization showed electrical conductivity of only 7.3 S/cm at the concentration of 0.5 M CuCl2. On contrary, in case of doping after polymerization, Cu doped PANI sample showed highest electrical conductivity of 35.7 S/cm at the same dopant concentration. Furthermore, the viscosity average molecular weight of the synthesized polyaniline was also evaluated. The prepared samples were further characterized by different techniques such as Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX) spectroscopy, and X-ray diffraction (XRD). Keywords Aniline · Polyaniline · Metal doped polyaniline · Doping techniques · Electrical properties
* Md. Mostafizur Rahman [email protected] Extended author information available on the last page of the article
13
Vol.:(0123456789)
Polymer Bulletin
Introduction Conductive polymer refers to a special kind of organic polymer or intrinsically conductive polymer that can conduct electricity [1]. They normally have π conjugated backbone chain, a sequence of alternating single and double bonds which result in the delocalization of π electrons along entire polymer chain. Polyaniline is the most generally utilized conductive polymer polymerized from aniline. It is remarkable among other conductive polymer because of its high electrical conductivity, simplicity of synthesis, ecological dependability, and basic doping mechanism. Contrary to other conjugated systems – c
Data Loading...
