DC Electrical Conductivity Retention, Optical Properties and Ammonia Sensing Analysis of Naturally Degraded CSA-Doped Graphene/polyaniline Composite Nanofibers Prepared with CTAB

2016 ◽  
Vol 46 (1) ◽  
pp. 331-339 ◽  
Author(s):  
Sayyed Ghazali ◽  
Muhammad M. Hossain ◽  
Abuzar Khan ◽  
Mohd Y. Khan ◽  
Mudassir Hasan
2006 ◽  
Vol 111 ◽  
pp. 99-102 ◽  
Author(s):  
A.A. Ahmed ◽  
Faiz Mohammad

The films of polyaniline:polyethyleneterephthalate films were prepared by polymerizing aniline soaked in polyethyleneterephthalate films of different thicknesses. The films were characterized by FTIR as well as for their electrical properties. The electrical properties of the films were observed to be of good quality as almost all the films showed a great increase in their electrical conductivity from insulator to semiconductor region after doping with hydrochloric acid. All the films in their doped state follow the Arrhenius equation for the temperature dependence of electrical conductivity from 35 to 115oC. The thermooxidative stability was studied by thermogravimetry and differential thermal analysis. The stability in terms of dc electrical conductivity retention was also studied under ambient conditions by two slightly different techniques viz. isothermal and cyclic techniques. The dc electrical conductivity of the films was found to be stable below 90oC for all the films under ambient conditions.


2020 ◽  
Vol 74 (11) ◽  
pp. 3887-3898 ◽  
Author(s):  
Mohammad Omaish Ansari ◽  
Mohammad Oves ◽  
Numan Salah ◽  
Mohammad Asad ◽  
Rajeev Kumar ◽  
...  

2020 ◽  
Vol 11 (1) ◽  
pp. 7614-7620

For the fabrication of the electrode, the Polyvinyl alcohol/polyaniline composite was prepared by the sol-gel method. The electrical conductivity of the composite was determined on compressed pellets by using a 4-in-line-probe dc electrical conductivity-measuring instrument. The electrical conductivity measurement studies revealed that the composite possessed the electrical conductivity in the range of 10-4 to 10-2 S cm-1, i.e., in the semiconductor region and followed the Arrhenius equation. The thermal stability of the composite material (HCl treated) in terms of dc electrical conductivity retention was studied under isothermal conditions (at 50, 70, 90, 110, 130, and 150 °C) at 15 min intervals. The stability of the material (HCl treated) in terms of electrical conductivity retention was also monitored for five cycles at increasing temperatures with 1 h intervals. The composite material was found thermally and environmentally stable in terms of dc electrical conductivity retention.


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