polyaniline – Page 2 – TechConnect Briefs

Rapid one-step chemical synthesis of polyaniline-manganese ferrite nanocomposites without external initiator and mechanical agitation

Chimamkpam E.F.C., Schweizer T., Schilling A., Ferreira J.M.F., Centre for Research in Ceramics and Composite Materials, PT

We describe a rapid one-step, room temperature method to chemically synthesize bulk quantities of nanocomposites comprising specifically of manganese ferrite (MnFe2O4) and polyaniline (conductive form). Typically a chemical agent, for example ammonium peroxydisulfate, is used [...]

Experiments to Investigate Electromagnetic Shielding Performance of Polyaniline-Coated Thin Films

Kim B.R., Lee H.K., Korea Advanced Institute of Science and Technology (KAIST), KR

Many studies on electromagnetic wave shielding/ absorbing materials have been performed. In particular, studies of novel materials have been carried out as an alternative to conventional shielding materials such as metallic materials. Recently, the investigation [...]

Method of enhancing polyaniline conductivity using different oxidizing agents as dopant

Iqbal M.A., Manzoor S., Punjab University, PK

The synthesis and characterization of Polyaniline pellets has been analyzed by using three different oxidizing agents like Ammonium per oxy disulphate (APS), Hydrogen per oxide and Potassium dichromate. Samples of different molar ratios of Aniline [...]

Solid State and Template Free Synthesis of a Nanotubular Polyaniline-TiO2 Composite

Bonnot K., Grandcolas M., Keller V., Spitzer D., ISL-CNRS, FR

Our work report on the synthesis of a novel polyaniline-titania tubular composite at nanoscale. Significant new accomplishments relies on the synthesis of polyaniline-TiO2 composite nanotubes, as up to now most researchs in this field reported [...]

The effect of polymerization rate on the formation of polyaniline nanofibers

Huang Y-F, Lin C-W, National Yunlin University of Science and Technology, TW

This study reports the synthesis of polyaniline (PANI) nanofibers with an average diameter of 30~50 nm using HCl as a dopant. Experiments controlled the polymerization rate in terms of temperature and oxidant concentration. Transmission electron [...]

Conducting Polymer Nanocomposites: Role of DNA Functionalized Carbon

Cheung W., Bogozi A., Ma Y., Mao G., Mao G., He H., Rutgers University, US

In this work, a water-soluble self-doped polyaniline nanocomposite was fabricated by in-situ polymerization of 3-aminophenylboronic acid monomers in the presence of single-stranded DNA dispersed- and functionalized- single-walled carbon nanotubes. For the first time, we found [...]

A Non-Oxidative Sensor Based on a Self-Doped Polyaniline/Carbon Nanotube Composite for Highly Sensitive and Selective Detection of the Neurotransmitter Dopamine

Ali S.R., Ma Y., Parajuli R.R., Balogan Y., Lai W.Y-C., He H., Rutgers University, US

The ability to measure the concentration of dopamine sensitively and selectively could potentially be used for molecular diagnosis of Parkinson’s disease. The ability to monitor its concentration in-vivo also benefits in design therapies and evaluating [...]

Synthesis and Magnetic Properties of Polyaniline-Based Magnetic Nanocomposites for EMI Applications

Renteria B., Singhal R., Calderon E., Tomar M.S., Banerjee J., University of Puerto Rico, PR

we have synthesized composite of polyaniline (PANI) with manganese-zinc-ferrite (MnXZn1-XFe2O4) nanoparticles. PANI was synthesized by polymerization of aniline in the presence of ammonium peroxydisulfate and HCl. Electrical conductivity of bare PANI pellets averaged 0.8044 (Ω·m)-1. [...]

Unique Roles of DNA Wrapped SWNTs: In-situ Fabrication of Self-Doped Polyaniline Nanocomposites

Ma Y.F., Ali S.R., He H.X., Rutgers University, US

Inspired by the remarkable electrical conductivity, the superior mechanical properties of carbon nanotubes(CNTs), and the rich optical, electrical and electrochemical properties of conducting polymers, nanocomposites of conducting polymers and CNTs have been pursued with a [...]

Polyaniline Nanofibers and Composite Materials for Chemical Detection

Weiller B.H., Virji S., Baker C., Huang J., Li D., Kaner R.B., The Aerospace Corporation, US

Polyaniline is a conducting polymer with electrical properties that can change greatly upon exposure to various chemicals. Most notably, when polyaniline is exposed to strong acids and bases, the conductivity changes by greater than 8 [...]