Effect of Inorganic Doping on the Thermoelectric Behavior of Polyaniline Nanocomposites

2020 ◽  
Vol 835 ◽  
pp. 200-207
Author(s):  
Mariamu K. Ali ◽  
Ahmed Abd Moneim
Keyword(s):  
Electrical Conductivity ◽  
Conducting Polymers ◽  
Inorganic Nanoparticles ◽  
Inorganic Materials ◽  
Environmental Stability ◽  
Subsequent Reduction ◽  
Preparation Methods ◽  
Reduced Graphene

Polyaniline (PANI) has been considered for thermoelectric (T.E) applications due to its facile preparation methods, easy doping-dedoping processes and its environmental stability. Like other conducting polymers (CPs), it has low thermal conductivity (usually below 1 Wm-1K-1) which is favorable for T.E applications, however studies have shown that it still suffers from low power factors as a result of low electrical conductivity. For this reason, PANI has been compounded with other materials such as polymers, inorganic nanoparticles and carbon nanoparticles to enhance its electrical conductivity, power factors (PF) and ultimately zT value.This work is focused on the synthesis and characterization of n-type polyaniline nanocomposites doped with reduced graphene oxide (rGO). The rGO was prepared through oxidation of graphite and subsequent reduction and incorporated into polyaniline through in situ polymerization and the resulting nanocomposites were characterized. Addition of rGO resulted in enhancement of the electrical conductivity of polyaniline from 10-3 S/cm to 10-1 S/cm which is two orders of magnitude higher. This contributed to the enhanced PF, an indication that thermoelectric behavior of conducting polymers can be boosted through compounding with inorganic materials.

Electrochemical Reactivity on Conducting Polymer Alloys

2013 ◽  
Vol 747 ◽  
pp. 489-492 ◽  
Author(s):  
Vanessa Armel ◽  
Orawan Winther-Jensen ◽  
Meng Zhang ◽  
Bjorn Winther-Jensen
Keyword(s):  
Conducting Polymers ◽  
Electrochemical Polymerization ◽  
Inorganic Nanoparticles ◽  
Inorganic Materials ◽  
Active Centers ◽  
Efficient Charge ◽  
Alternative Approaches ◽  
Harsh Conditions ◽  
Selection Of

Embedding macromolecules and active centers such as inorganic nanoparticles into conducting polymers (CPs) has been an ongoing challenge due to the normally harsh conditions required during chemical or electrochemical polymerization that limits the selection of the functional molecules to be incorporated. By developing alternative approaches for incorporating various organic and inorganic materials into CPs it has been possible to obtain efficient charge transfer within the alloys. In this report, two facile techniques are discussed for obtaining such composites: 1) In-situ polymerisation of poly (3,4-ethylenedioxythiophene) (PEDOT) in the presence of non-conducting polymers and 2) electrochemical deposition in-organic nanoparticles inside PEDOT.

scholarly journals Conducting polymers: a comprehensive review on recent advances in synthesis, properties and applications

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5659-5697 ◽  
Author(s):  
Namsheer K ◽  
Chandra Sekhar Rout
Keyword(s):  
Mechanical Properties ◽  
Electrical Property ◽  
Conducting Polymers ◽  
Inorganic Materials ◽  
Environmental Stability ◽  
Comprehensive Review ◽  
Recent Advances ◽  
Synthesis Properties

Conducting polymers are extensively studied due to their outstanding properties, including tunable electrical property, optical and high mechanical properties, easy synthesis and effortless fabrication and high environmental stability over conventional inorganic materials.

Chemically reduced graphene oxide-coated knitted fabric imparted conductivity and outstanding hydrophobicity

2021 ◽  
pp. 004051752199547
Author(s):  
Min Hou ◽  
Xinghua Hong ◽  
Yanjun Tang ◽  
Zimin Jin ◽  
Chengyan Zhu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Chemical Reduction ◽  
Knitted Fabric ◽  
Mesh Structure ◽  
Reduced Graphene ◽  
Chemically Reduced Graphene Oxide ◽  
Modified Hummers Method

Functionalized knitted fabric, as a kind of flexible, wearable, and waterproof material capable of conductivity, sensitivity and outstanding hydrophobicity, is valuable for multi-field applications. Herein, the reduced graphene oxide (RGO)-coated knitted fabric (polyester/spandex blended) is prepared, which involves the use of graphite oxide (GO) by modified Hummers method and in-situ chemical reduction with hydrazine hydrate. The treated fabric exhibits a high electrical conductivity (202.09 S/cm) and an outstanding hydrophobicity (140°). The outstanding hydrophobicity is associated with the morphology of the fabric and fiber with reference to pseudo-infiltration. These properties can withstand repeated bending and washing without serious deterioration, maintaining good electrical conductivity (35.70 S/cm) and contact angle (119.39°) after eight standard washing cycles. The material, which has RGO architecture and continuous loop mesh structure, can find wide use in smart garment applications.

The Effect of Reduced Graphene Oxide (rGO) Coating on Electrical Conductivity of Lithium Ferro Phosphate (LFP) as an Alternative Cathode for Li-Ion Battery

2019 ◽  
Vol 966 ◽  
pp. 386-391
Author(s):  
Eka Suarso ◽  
Anna Zakiyatul Laila ◽  
Firsta Agung Setyawan ◽  
Mochamad Zainuri ◽  
Zaenal Arifin ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Mass Ratio ◽  
Good Crystallinity ◽  
Reduced Graphene ◽  
Phosphate Source

In this study an investigation has been conducted on the effect of reduced graphene oxide (rGO) coating on increasing the value of Lithium Ferro Phosphate (LFP) electrical conductivity. This coating process uses a variation of the mass ratio of LiFePO4/rGO by 90%:10%, 70%:20%, and 67%:33%. The LiFePO4 precursor was prepared using the sol-gel rute from the main commercial materials, namely Li2CO3 powder as a source of lithium ions, FeCl2.4H2O as a source of iron and NH4H2PO4 powder as a phosphate source. As for the coating used rGO extracted from coconut shell waste. The samples were calcined with temperature variations of 600°C, 650°C and 700°C in an argon environment for 10 hour. The phase purity and crystal structure of LiFePO4 were analyzed using XRD. The analysis of data from XRD was done using the the Match!, Rietica, and MAUD software. Based on the results of XRD analysis, LiFePO4 with high purity and good crystallinity was obtained when the sample was calcined at temperature of 700°C. The results of the MAUD analysis show that the best size of LiFePO4 crystal is 86,54 nm. LiFePO4/rGO nanocomposite was successfully synthesized by mechanical ultracentrifugation method. The characterization of the value of electrical conductivity, carried out using a four-point probe. The results show that the greater the percentage of rGO, the higher the value of electrical conductivity. The mass ratio of 67% LiFePO4 and 33% rGO shows an increment in good conductivity values, from the original order of 10-8 S/cm to the order of 10-4 S/cm.

In Situ Synthesis and Characterization of Poly(aryleneethynylene)-Grafted Reduced Graphene Oxide

2016 ◽  
Vol 22 (7) ◽  
pp. 2247-2252 ◽  
Author(s):  
Sai Sun ◽  
Xiaodong Zhuang ◽  
Bo Liu ◽  
Luxing Wang ◽  
Linfeng Gu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
In Situ Synthesis ◽  
Synthesis And Characterization ◽  
Reduced Graphene

Polypyrrole coating of inorganic and organic materials by chemical oxidative polymerisation

2012 ◽  
Vol 66 (5) ◽  
Author(s):  
Mária Omastová ◽  
Matej Mičušík
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Conducting Polymers ◽  
Metal Oxides ◽  
Clay Minerals ◽  
Radiation Shielding ◽  
Inorganic Materials ◽  
High Electrical Conductivity ◽  
New Materials ◽  
Nanoparticles Of Metal Oxides

AbstractPolypyrrole is one of the most frequently studied conducting polymers, having high electrical conductivity and stability, suitable for multi-functionalised applications. Coatings of chemically synthesised polypyrrole applied onto various organic and inorganic materials, such as polymer particles and films, nanoparticles of metal oxides, clay minerals, and carbon nanotubes are reviewed in this paper. Its primary subject is the formation of new materials and their application in which chemical oxidative polymerisation of pyrrole was used. These combined materials are used in antistatic applications, such as anti-corrosion coating, radiation-shielding, but also as new categories of sensors, batteries, and components for organic electronics are created by coating substrates with conducting polymer layers or imprinting technologies.

scholarly journals In Situ Structural and Electrical Conductivity Characterization of Sr2MMoO6−δ Double Perovskite Solid Oxide Fuel Cell Anode Materials

2020 ◽  
Vol 3 (6) ◽  
pp. 5353-5360
Author(s):  
Suzanne E. Witt ◽  
Andrew J. Allen ◽  
Ivan Kuzmenko ◽  
Megan E. Holtz ◽  
Sandra Young
Keyword(s):  
Electrical Conductivity ◽  
Fuel Cell ◽  
Anode Materials ◽  
Double Perovskite ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Cell Anode ◽  
Fuel Cell Anode

scholarly journals Synthesis and Gas Transport Properties of Poly(2,6-dimethyl-1,4-phenylene oxide)–Silica Nanocomposite Membranes

Membranes ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 125
Author(s):  
Golnaz Bissadi ◽  
Thiago Melo Santos ◽  
Boguslaw Kruczek
Keyword(s):  
Polymer Solution ◽  
Silica Nanoparticles ◽  
Aqueous Phase ◽  
Continuous Phase ◽  
Inorganic Nanoparticles ◽  
Nanocomposite Membranes ◽  
New Approach ◽  
Phenylene Oxide

The emulsion polymerized mixed matrix (EPMM) method is a new approach to prepare nanocomposite membranes, in which inorganic nanoparticles are synthesized in situ at the interface of a dispersed aqueous phase in a continuous phase of polymer solution. In this paper, we report the synthesis and characterization of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO)-based EPMM membranes, in which silica nanoparticles are synthesized by the polymerization of tetraethylorthosilicate (TEOS) in the presence of two different co-solvents, ethanol and acetone, which are soluble in both the aqueous phase and the polymer solution. The EPPM membranes prepared in the presence of acetone show greater conversions of TEOS and a different structure of the synthesized silica nanoparticles compared to the EPMM membranes prepared in the presence of ethanol. The former membranes are both more permeable and more selective for O2/N2 and CO2/CH4. Both types of EPMM membranes are more permeable than the reference PPO membranes. However, while their O2/N2 selectivity is practically unchanged, their CO2/CH4 selectivity is decreased compared to the reference PPO membranes.

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