scholarly journals Synthesis and Characterization of Organically Soluble and Electrically Conducting Acids Doped Polyaniline

2010 ◽  
Vol 4 (4) ◽  
pp. 277-280
Author(s):  
Vasant Chabukswar ◽  
◽  
Sanjay Bhavsar ◽  
Keyword(s):  
Lactic Acid ◽  
Acrylic Acid ◽  
Oxidative Polymerization ◽  
Conductivity Measurement ◽  
Electrically Conducting ◽  
Visible Spectra ◽  
Doped Polyaniline ◽  
Doped Polymer ◽  
Polymerization Method

Emeraldin salt of polyaniline was synthesized by chemical oxidative polymerization method; this salt is soluble in common organic solvents. The obtained results are discussed with reference to lactic acid doped polyaniline. It has been observed that acrylic acid doped polyaniline is comparatively more soluble than polyaniline doped with lactic acid in common organic solvent such as m-cresol, NMP (N-methyl pyrrolidinone), DMSO, DMF, etc. The acrylic acid doped polymer prepared using lactic acid is comparatively more soluble in m-cresol and NMP than the polyaniline without acrylic acid. UV-Visible spectra for acrylic acid doped polyaniline reveals the coil conformation at higher wavelength along with sharp peak. This indicates that the conductivity of acrylic acid doped polyaniline is higher than that of polyaniline without acrylic acid. A broad and intense band at 3400–3300cm-1 (N–H stretching) and 1120–1225 cm-1 accounts for higher degree of doping and protonation of amine and imine N-atom. These results are well supported by the conductivity measurement – the conductivity of acrylic acid doped polyaniline is higher than in case of polyanіline without acrylic acid.

scholarly journals Preparation and characterization of a new polyaniline salt with good conductivity and great solubility in dimethyl sulfoxyde

2015 ◽  
Vol 80 (11) ◽  
pp. 1435-1448 ◽  
Author(s):  
Hichem Zeghioud ◽  
Saad Lamouri ◽  
Yasmine Mahmoud ◽  
Tarik Hadj-Ali
Keyword(s):  
Conductivity Measurement ◽  
Emeraldine Base ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
A Value ◽  
Base Form ◽  
Visible Spectra ◽  
Doped Polyaniline ◽  
Dispersing Medium

In this study, we propose a novel conducting and soluble polyaniline salt prepared by chemical polymerization in the presence of new doping agent (IAs). This last is prepared by sulphonation of itaconic acid (IA) with concentrated sulphuric acid in THF. The obtained doped polyaniline (PANI-IAs) is extremely soluble in dimethyl sulfoxyde (DMSO) at room temperature, in which the solubility reach 44 mg mL-1. The conductivity measurement of doped polyaniline powder precipitated in THF as dispersing medium gave a value of 0.13 S cm-1 when the emeraldine base form of polyaniline is fully protonated. The polyaniline salt sample is characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction, UV-Visible spectra and FTIR spectra.

Synthesis and Characterization of Polyaniline -Crooked Gold Nanocomposite with Reduced Conductivity

2009 ◽  
Vol 5 ◽  
pp. 79-85 ◽  
Author(s):  
Ranjit R. Hawaldar ◽  
M. Kulkarni ◽  
Sandesh R. Jadkar ◽  
Umapada Pal ◽  
Dinesh Amalnerkar
Keyword(s):  
Oxidative Polymerization ◽  
Emeraldine Salt ◽  
One Dimensional ◽  
Nano Gold ◽  
Doped Polyaniline ◽  
Salt Phase ◽  
Uv Visible ◽  
Gold Nanocomposites

Conducting Polyaniline (Pani)-crooked Gold nanocomposites were synthesized by in situ chemo-oxidative polymerization of aniline with previously made crooked gold nanoparticles by using ammonium per oxidisulphate as oxidizing agent and p-toluene sulphonic acid (p-TSA) as dopant. The formation of nano gold was established by UV-visible spectroscopy with a SPR peak at 512 nm and crooked morphology was confirmed by TEM. Spectroscopic analysis confirmed the formation of the conducting emeraldine salt phase of the polymer. Due to clustering of composite nanoparticles, the polymer composite formed one-dimensional rod-like morphologies. Thermogravimetric analysis revealed a typical three-step decomposition pattern pertaining to polyaniline emeraldine salt. The conductivity of the nanocomposite was found to be lower (2.47 S/cm) than the virgin p-TSA doped polyaniline (5.55 S/cm).

scholarly journals Spectroscopy and Conductivity Studies of Polyvinyl Alcohol (PVA)/Polypyrrol (Ppy) Nanocomposite with Various Chloride Metals to Improved Properties of the Polymers

2019 ◽  
Vol 16 (1) ◽  
pp. 55-63
Author(s):  
Naglaa Shahin ◽  
Reham Kamal Abd El Hamid
Keyword(s):  
Polyvinyl Alcohol ◽  
Oxidative Polymerization ◽  
Conductivity Measurement ◽  
Charge Carriers ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
Metal Chlorides ◽  
X Ray ◽  
Polymerization Method ◽  
Transition Electron

Polyvinyl alcohol- polypyrrole (PVA-PPy) nanocomposites with metal chlorides (FeCl3, NiCl2, CuCl2 and ZnCl2) have been synthesized by chemical oxidative polymerization method. These synthesized nanocomposites are characterized by using FTIR, X-ray diffraction, Transition electron microscope (TEM) and Conductivity measurement. TEM exhibit that all of the composites have uniform sizes and morphologies.  The diameter of PVA/PPy nanocompsite is 58nm when the metals added to the PVA/PPy the diameters becomes smaller. The variation of electrical conductivity (log ?) with 1000/T for PVA/PPy nanocomposite with metal chlorides revealed that the increase in conductivity s at temperature (393K) with added metals can be attributed to the creation of induced charge carriers in PVA/PPy matrix

scholarly journals Chemical Oxidative Synthesis and Characteristion of Organica acid Doped Soluble Conducting Poly(o-anisidine)

2009 ◽  
Vol 3 (2) ◽  
pp. 95-99
Author(s):  
Vasant Chabukswar ◽  
◽  
Ganesh Sable ◽  
Keyword(s):  
Acrylic Acid ◽  
Tartaric Acid ◽  
Sharp Peak ◽  
Emeraldine Base ◽  
Spectral Studies ◽  
Ammonia Vapor ◽  
Emeraldine Salt ◽  
Base Form ◽  
Doped Polymer ◽  
Polymerization Method

Synthesis of poly(o-anisidine) with and without acrylic acid doping is carried out by chemical oxidative polymerization method. This is a new polymerization method for the direct synthesis of the emeraldine salt of poly(o-anisidine), i.e. it is directly soluble in known organic solvent such as m-cresol, N-methyl pyrrolidone (NMP), DMSO, DMF, etc. without the need for a conversion of salt phase to base form. The reaction is unique since it eliminates the post processing step which involves neutralization of emeraldine salt to form emeraldine base and again reprotonating the base with a secondary protonic acid. The acrylic acid doped polymer prepared using tartaric acid is comparatively more soluble in m-cresol and NMP than the poly(o-anisidine) prepared without acrylic acid. UV-visible spectra for acrylic acid doped poly(o-anisidine) reveals the coil conformation at higher wavelength ~800–1000 nm along with sharp peak ~440 nm, which may be attributed to secondary doping due to extended coil conformation. Whereas in the presence of NMP as a solvent, the extended tail at higher wavelength disappears while a sharp peak (~630 nm) is observed representing the polymer insulting emeraldine base form. This fact confirms the effect of the solvent on the polymer properties. This is further manifested by the FT-IR spectral studies. Broad and intense band at ~3300–3200cm–1 and 1100–1200 cm–1 in acrylic acid doped polymer accounts for higher degree of doping. The conductivity of acrylic acid doped poly(o-anisidine) is greater than poly(o-anisidine) without acrylic acid. The change in resistance of tartaric acid doped poly(o-anisidine) prepared in acrylic acid media upon its exposure to ammonia vapor suggests the applicability of these polymeric materials for ammonia.

scholarly journals Silver Doped Polyaniline-Graphene Based Barium Ferrite Composite as Humidity Sensor and Photocatalyst

2021 ◽  
Vol 33 (12) ◽  
pp. 3075-3081
Author(s):  
K. Vinay ◽  
Y.T. Ravikiran ◽  
M. Revanasiddappa ◽  
A. Naveen Kumar ◽  
K. Veena ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
Capillary Condensation ◽  
Oxidative Polymerization ◽  
High Sensitivity ◽  
Tangent Loss ◽  
Wide Range ◽  
Low Humidity ◽  
Ft Ir ◽  
Doped Polyaniline ◽  
Polymerization Method

In this work, the response of humidity sensing and dielectric properties of PANI/Ag/graphene/BaFe12O19 (PAGB) composite prepared by chemical interfacial oxidative polymerization method using the ammonium peroxydisulfate as an oxidant is presented. The synthesized PAGB composite was characterized by using FT-IR, XRD, SEM and EDAX techniques. The measured dielectric constant and dielectric tangent loss values were found to decrease with increase in logarithmic frequency. The electrical resistance of the composite was also found to decrease from 2500 MΩ to 7 MΩ, on exposure to a wide range of relative humidity (RH) varying between 10% and 97% RH. This observed decrease is due to capillary condensation of water molecules which cause the changes in electrical conductivity of composite. The synthesized PAGB-50% composite displayed a high sensitivity at low humidity ranging from 20% to 60% RH. The composite has been proved to be a better candidate in the design of humidity sensors. In addition, PAGB composite exhibited efficiency towards the degradation of organic anionic dye, acid orange-8, with high potential of reusability.

scholarly journals Facial Synthesis and Characterization of Polypyrrole/zinc oxide (ZnO) Nanorode and Flower-like Shape Composites

2018 ◽  
Vol 34 (1) ◽  
Author(s):  
Sang Nguyen Xuan
Keyword(s):  
Zinc Oxide ◽  
Oxidative Polymerization ◽  
Polymer Nanocomposite ◽  
Synthesis And Characterization ◽  
Chemical Oxidative Polymerization ◽  
Sem Images ◽  
X Ray ◽  
Polymerization Method ◽  
Composite Samples

Polypyrrole (PPy) nanocomposites reinforced with zinc oxide (ZnO) nanorod and nano flower were fabricated by chemical oxidative polymerization method using an ammonium per-sulphate (APS, (NH4)2S2O8) as an oxidizing agent. The polymer nanocomposite were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR). The results were compared with pure as-prepared PPy. The SEM images of the nanocomposites show homogeneous dispersion characteristics and different morphologies of ZnO structures such as rod and flower-like shapes.  In the FTIR spectra, composite samples showed characteristic peaks of PPy shifted to higher positions confirmed the interfacial interactions between ZnO and PPy matrix.

scholarly journals Structural and electrical properties of new core-shell silver poly(m-toluidine-co-2-bromoaniline) nanocomposites

2019 ◽  
Vol 37 (4) ◽  
pp. 526-534
Author(s):  
A. Mahudeswaran ◽  
A. Jeeva ◽  
J. Chandrasekaran ◽  
P.S. Vijayanand
Keyword(s):  
Electrical Conductivity ◽  
Silver Nanoparticles ◽  
Oxidative Polymerization ◽  
Silver Particles ◽  
Characterization Methods ◽  
Structural And Electrical Properties ◽  
Ft Ir ◽  
Polymerization Method ◽  
Copolymer Composites

AbstractIn this article, we report the synthesis and characterization of silver dispersed poly(m-toluidine-co-2-bromoaniline) copolymer synthesized by chemical oxidative polymerization method. The synthesized copolymer composites were subjected to different analytical characterization methods, such as FT-IR, UV, XRD, SEM, photoluminescence and electrical conductivity studies. All the polymer samples are found to be soluble in common organic solvents. UV absorption spectra show a red shift when silver nanoparticles are dispersed in the copolymer. The characteristic peaks observed in FT-IR spectra confirm the formation of the copolymer. XRD pattern reveals the crystalline nature of the copolymer composites and sharp peaks in the spectra confirm the presence of silver particles. The silver nanoparticles change the surface morphology in the form of perfect encapsulation. The electrical conductivity of the polymer composites is found to vary from 10−4 S/cm to 10−6 S/cm. PL study reveals the charge transfer between the copolymer and the silver particles.

Synthesis and characterization of electrically conducting copolymers of poly(aniline-co-o-iodoaniline)

2014 ◽  
Vol 07 (05) ◽  
pp. 1450062 ◽  
Author(s):  
Umesh S. Waware ◽  
Mohd Rashid
Keyword(s):  
Physical Properties ◽  
Polymer Chain ◽  
Oxidative Polymerization ◽  
Feed Ratio ◽  
Electrically Conducting ◽  
Molar Feed Ratio ◽  
Conducting Copolymers ◽  
Acid Aqueous Medium ◽  
Poly Aniline

Functionalized copolymers of poly(aniline-co-o-iodoaniline) have been synthesized by the chemical oxidative polymerization method by using o-iodoaniline (o-IA) and aniline (AN) as monomer units by changing their molar feed ratio in acid aqueous medium. The physical properties viz; solubility, electrical conductivity have been studied to characterize them. The copolymers possess better solubility than unsubstituted homopolymer in organic solvent such as N -methyl-2-pyrrodinone (NMP). The conductivity of the pressed pellets of as-synthesized copolymers depends upon the content of o-IA in the polyaniline (PANI). The structural confirmation of the copolymer has been explained by Fourier transform infrared spectroscopy study which suggest that AN and o-IA units are uniformly distributed along the polymer chain and thus, the physical properties of copolymers may possibly be tailored by varying the molar feed ratio in copolymerization reactions. The conductivity of the copolymer decreases upon increasing the o-IA content in molar feed, because the introduction of –I- as a functional group reduces the extent of conjugation of the polymer chain.

scholarly journals Fabrication of nanochitosan incorporated polypyrrole/alginate conducting scaffold for neural tissue engineering

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Asma Manzari-Tavakoli ◽  
Roghayeh Tarasi ◽  
Roya Sedghi ◽  
Ali Moghimi ◽  
Hassan Niknejad
Keyword(s):  
Electrical Conductivity ◽  
Tissue Engineering ◽  
Oxidative Polymerization ◽  
Neural Tissue ◽  
Dermal Fibroblasts ◽  
Human Dermal Fibroblasts ◽  
Neural Tissue Engineering ◽  
Ft Ir ◽  
Polymerization Method

AbstractThe utilization of conductive polymers for fabrication of neural scaffolds have attracted much interest because of providing a microenvironment which can imitate nerve tissues. In this study, polypyrrole (PPy)–alginate (Alg) composites were prepared using different percentages of alginate and pyrrole by oxidative polymerization method using FeCl3 as an oxidant and electrical conductivity of composites were measured by four probe method. In addition, chitosan-based nanoparticles were synthesized by ionic gelation method and after characterization merged into PPy–Alg composite in order to fabricate a conductive, hydrophilic, processable and stable scaffold. Physiochemical characterization of nanochitosan/PPy–Alg scaffold such as electrical conductivity, porosity, swelling and degradation was investigated. Moreover, cytotoxicity and proliferation were examined by culturing OLN-93 neural and human dermal fibroblasts cells on the Nanochitosan/PPy–Alg scaffold. Due to the high conductivity, the film with ratio 2:10 (PPy–Alg) was recognized more suitable for fabrication of the final scaffold. Results from FT-IR and SEM, evaluation of porosity, swelling and degradation, as well as viability and proliferation of OLN-93 neural and fibroblast cells confirmed cytocompatiblity of the Nanochitosan/PPy–Alg scaffold. Based on the features of the constructed scaffold, Nanochitosan/PPy–Alg scaffold can be a proper candidate for neural tissue engineering.

Synthesis and Characterization of PANI/Ferric Chloride Composite for Fabrication of Electrodes in Supercapacitor

2013 ◽  
Vol 768 ◽  
pp. 334-337 ◽  
Author(s):  
Deebankarthikeyan Sivalingam ◽  
Hemalatha Elangovan ◽  
Manikandan Subramanian ◽  
Senthil Kumar Kandasamy ◽  
Murugesan Govindasamy
Keyword(s):  
Ferric Chloride ◽  
In Situ Polymerization ◽  
Ammonium Persulfate ◽  
Supercapacitor Application ◽  
Vis Spectroscopy ◽  
Doped Polyaniline ◽  
Polymerization Method ◽  
Hcl Medium

The main objective of this work is to synthesize polyaniline/ferric chloride composite and to measure the conductivity of the as prepared composite. And also, to analyze the ability of using Ferric Chloride doped polyaniline as an electrode material for the fabrication of supercapacitor application. By in-situ polymerization method, polyaniline in pure form and doped form with the ferric chloride were synthesized using ammonium persulfate as initiator in HCl medium. Polyaniline nanoparticles and its composite are characterized by UV-Vis spectroscopy, FTIR, XRD and Conductivity meter.

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