scholarly journals Secondary Dopants of Electrically Conducting Polyanilines

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2904
Author(s):  
Young-Gi Kim ◽  
Hai-Long Nguyen ◽  
Patrick Kinlen
Keyword(s):  
Electrical Conductivity ◽  
Sulfonic Acid ◽  
Critical Role ◽  
Electrical Characteristics ◽  
Electrically Conducting ◽  
Vapor Annealing ◽  
Solution Cast ◽  
Secondary Doping ◽  
Polyaniline Films ◽  
Doped Polyaniline

Secondary dopants and the doping methods were identified for increasing the electrical conductivity of a highly processable and a primarily doped polyaniline dinonylnaphthalene sulfonic acid (PANI-DNNSA). The secondary doping was carried out using film, solution, and vapor doping methods. The doping methods and functional groups of secondary dopants were observed to play a critical role for inducing electrical characteristics of polyaniline. When secondary film doping method and p-toluenesulfonic acid were used, the electrical conductivity of the secondary doped polyaniline was measured to be increased from 0.16 to 334 S/cm. A novel vapor annealing doping method was developed to incorporate secondary dopants into solution cast polyaniline films.

Hydrogen Bonding Effects on the Electrical Properties and Phase Morphology of Polyaniline Blends

2005 ◽  
Vol 13 (4) ◽  
pp. 415-423
Author(s):  
Pan Wei ◽  
Yang Shenglin ◽  
Li Guang ◽  
Jiang Jianming
Keyword(s):  
Electrical Conductivity ◽  
Hydrogen Bonding ◽  
Electrical Properties ◽  
Cluster Size ◽  
Sulfonic Acid ◽  
Carbonyl Groups ◽  
Solution Cast ◽  
Doped Polyaniline ◽  
Dodecylbenzene Sulfonic Acid ◽  
Polyacrylonitrile Copolymer

Blends of dodecylbenzene sulfonic acid-doped polyaniline (PANI-DBSA) with either polyacrylonitrile copolymer (PAN) or polystyrene (PS) were solution cast. The investigation focused on the interaction between the components, the morphology and the resulting electrical conductivity of blends. The results showed that with the same PANI-DBSA content the conductivity of PANI-DBSA/PAN was higher than that of PANI-DBSA/PS. PANI-DBSA was dispersed uniformly in the PAN matrix and its cluster size was rather smaller than in the PS matrix. This is attributed to hydrogen bonding between the carbonyl groups in PAN and the imine groups in PANI, which should lead to better compatibility between PANI-DBSA and PAN.

Preparation and Thermoelectric Properties of Polyaniline Doped with Protonic Acids

2013 ◽  
Vol 743-744 ◽  
pp. 100-104
Author(s):  
Qing Li Zhang ◽  
Yan Xia Chang ◽  
Lian Jun Wang ◽  
Wan Jiang
Keyword(s):  
Electrical Conductivity ◽  
Hydrochloric Acid ◽  
Thermoelectric Properties ◽  
Sulfonic Acid ◽  
Room Temperature ◽  
Mass Ratio ◽  
Camphor Sulfonic Acid ◽  
Chemical Polymerization ◽  
Doped Polyaniline ◽  
Protonic Acids

Hydrochloric acid doped polyaniline and camphor sulfonic acid doped polyaniline were prepared by oxidative chemical polymerization and grinding, respectively. The structures of polyaniline samples were measured by Fourier transform infared spectroscopy. The Seebeck coefficient and electrical conductivity of the composites were investigated as protonic acid content in the temperature range from room temperature to 380K. The highest electrical conductivity of the 1M hydrochloric acid doped polyaniline reaches 5.57×102S/m at 320K, and the mass ratio of 1:1 camphor sulfonic acid doped polyaniline reaches 5.97×102S/m at 380K. This work suggests that a new method improves the thermoelectric properties of conducting polymers.

Flexible, all-organic ammonia sensor based on dodecylbenzene sulfonic acid-doped polyaniline films

2010 ◽  
Vol 518 (23) ◽  
pp. 7133-7137 ◽  
Author(s):  
G. Rizzo ◽  
A. Arena ◽  
N. Donato ◽  
M. Latino ◽  
G. Saitta ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
Ammonia Sensor ◽  
Polyaniline Films ◽  
Doped Polyaniline ◽  
Dodecylbenzene Sulfonic Acid

scholarly journals Effect of Moisture on Electrical Conductivity of H2SO4-Doped Polyaniline Films.

1999 ◽  
Vol 56 (11) ◽  
pp. 749-752
Author(s):  
Hiroshi TSUBAKIHARA ◽  
Haruki SUDOH ◽  
Kohtaku HAYASHI
Keyword(s):  
Electrical Conductivity ◽  
Polyaniline Films ◽  
Doped Polyaniline ◽  
Effect Of Moisture

Electrical conductivity and thermopower of phosphoric acid doped polyaniline

1997 ◽  
Vol 84 (1-3) ◽  
pp. 789-790 ◽  
Author(s):  
Chul Oh Yoon ◽  
Jong Hyun Kim ◽  
Hyun Kyung Sung ◽  
Hosull Lee
Keyword(s):  
Electrical Conductivity ◽  
Phosphoric Acid ◽  
Doped Polyaniline

Synthesize Phosphomolybdic Acid-Doped Polyaniline Microspheres for Catalytic Applications

2014 ◽  
Vol 484-485 ◽  
pp. 137-140
Author(s):  
Jin Zhang Tao
Keyword(s):  
Hydrogen Peroxide ◽  
Formation Mechanism ◽  
Critical Role ◽  
Phosphomolybdic Acid ◽  
Major Effect ◽  
High Conversion ◽  
Composite Microspheres ◽  
Pani Composite ◽  
Doped Polyaniline ◽  
Catalytic Applications

Polyaniline (PANI) composite have generated great interest in the catalyst field due to the coordinate properties of their component. Herein, PANI-PMo12 composite microspheres were successfully fabricated via a facial oxypolymerization with hydrogen peroxide as oxidant and phosphomolybdic acid (PMo12) as dopant. The PANI-PMo12 microspheres were characterized by SEM, XRD, FTIR and XPS. The concentration of PMo12 had a major effect on the diameter of microsphere. The solvent ethanol also played a critical role in the formation of microspheres. The formation mechanism of the PANI-PMo12 microspheres was proposed. Further, the composite microspheres could be directly used as catalyst and displayed a high conversion and selectivity in the epoxidation of cis-cyclooctene with aqueous H2O2 as an oxidant.

Bacterial cellulose as a carbon nano-fiber precursor: Enhancement of thermal stability and electrical conductivity

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 3408-3426
Author(s):  
Fateme Rezaei ◽  
Rabi Behrooz ◽  
Shahram Arbab ◽  
Ehsanollah Nosratian Sabet
Keyword(s):  
Thermal Stability ◽  
Electrical Conductivity ◽  
Flame Retardant ◽  
Bacterial Cellulose ◽  
Heating Rate ◽  
Carbon Nanofiber ◽  
Diammonium Phosphate ◽  
Electrical Characteristics ◽  
Stabilization Process ◽  
Nanofiber Sheets

Bacterial cellulose was selected as a potential precursor for the production of carbon nanofiber because of its high purity and crystallinity. Diammonium phosphate ((NH4)2HPO4) as a flame retardant was used to impregnate the cellulosic nanofiber sheet precursor in order to increase its thermal stability during the thermal processing. Also, the effect of heating rate on the stabilization and carbonization processes of cellulosic nanofiber samples was investigated. The precursor and resulted carbon nanofiber sheets were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and electrical characteristics. The results showed that the simultaneous usage of flame retardant (diammonium phosphate) and low heating rate in the stabilization process (2 °C min-1) increases thermal stability of cellulosic nanofiber sheets and the carbon yield. The presence of a flame retardant acts like a low heating rate effect but does not significantly affect the high heating rate of the stabilization process. As carbonization temperature increased, electrical conductivity and crystallite size were increased for impregnated samples. The carbonization process at 1200 °C, with a heating rate of 2 °C min-1, makes bacterial cellulose precursor an appropriate candidate for producing carbon nanofiber sheets with proper electrical characteristics.

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