Novel silver nanoparticles/polyaniline composites …

T1 - Synthesis and characterization of polyaniline derivative and silver nanoparticle composites

Synthesis and characterization of polyaniline derivative and ..

AB - Novel polyaniline/gold (PANI/Au) and polyaniline/platinum (PANI/Pt) core-shell nanocomposites were successfully synthesized via miniemulsion polymerization of aniline monomer in presence of chloroauric acid and chloroplatinic acid respectively. The morphology and structure of the prepared composites were characterized by scanning electron microscopy (SEM), light microscope (LM), transmission electron microscopy (TEM), dynamic light scattering (DLS), gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FTIR) and thermo gravimetric analysis (TGA). A possible formation mechanism of the PANI/Au and PANI/Pt core-shell nanocomposites was also proposed. The DC conductivity measurements at room temperature for the prepared nanocomposites showed very high conductivities due to presence of Au and Pt nanoparticles.

In-situ synthesis and characterization of conducting metal — polyaniline nanocomposites.

Synthesis and characterization of carboxymethyl guar …

N2 - Background: There has been a recent surge of interest in the synthesis and applications of electroactive polymers with incorporated metal nanoparticles. These hybrid systems are expected to display synergistic properties between the conjugated polymers and the metal nanoparticles, making them potential candidates for applications in sensors and electronic devices. Results: Composites of polyaniline derivatives - polyaniline, poly(2,5-dimethoxyaniline) and poly(aniline-2,5-dimethoxyaniline) - and silver nanoparticles were prepared through simultaneous polymerization of aniline derivative and reduction of AgNO3 in the presence of poly(styrene sulfonic acid) (PSS). We used AgNO3 as one of the initial components (1) to form the silver nanoparticles and (2) as an oxidizing agent for initiation of the polymerization reaction. UV-visible spectra of the synthesized nanocomposites reveal the synchronized formation of silver nanoparticles and polymer matrix. The morphology of the silver nanoparticles and degree of their dispersion in the nanocomposites were characterized by transmission electron microscopy. Thermogravimetric analysis and differential scanning calorimetry results indicate an enhancement of the thermal stability of the nanocomposites compared to the pure polymers. The electrical conductivity of the nanocomposites is in the range 10-4 to 10-2 S cm-1. Conclusion: A single-step process for the synthesis of silver nanoparticle-polyaniline derivative nanocomposites doped with PSS has been demonstrated. The approach in which silver nanoparticles are formed simultaneously during the polymerization process results in a good dispersion of the nanoparticles in the conductive polymer matrix.

AB - Background: There has been a recent surge of interest in the synthesis and applications of electroactive polymers with incorporated metal nanoparticles. These hybrid systems are expected to display synergistic properties between the conjugated polymers and the metal nanoparticles, making them potential candidates for applications in sensors and electronic devices. Results: Composites of polyaniline derivatives - polyaniline, poly(2,5-dimethoxyaniline) and poly(aniline-2,5-dimethoxyaniline) - and silver nanoparticles were prepared through simultaneous polymerization of aniline derivative and reduction of AgNO3 in the presence of poly(styrene sulfonic acid) (PSS). We used AgNO3 as one of the initial components (1) to form the silver nanoparticles and (2) as an oxidizing agent for initiation of the polymerization reaction. UV-visible spectra of the synthesized nanocomposites reveal the synchronized formation of silver nanoparticles and polymer matrix. The morphology of the silver nanoparticles and degree of their dispersion in the nanocomposites were characterized by transmission electron microscopy. Thermogravimetric analysis and differential scanning calorimetry results indicate an enhancement of the thermal stability of the nanocomposites compared to the pure polymers. The electrical conductivity of the nanocomposites is in the range 10-4 to 10-2 S cm-1. Conclusion: A single-step process for the synthesis of silver nanoparticle-polyaniline derivative nanocomposites doped with PSS has been demonstrated. The approach in which silver nanoparticles are formed simultaneously during the polymerization process results in a good dispersion of the nanoparticles in the conductive polymer matrix.


Preparation of a Novel Nanocomposite of Polyaniline …

N2 - Novel polyaniline/gold (PANI/Au) and polyaniline/platinum (PANI/Pt) core-shell nanocomposites were successfully synthesized via miniemulsion polymerization of aniline monomer in presence of chloroauric acid and chloroplatinic acid respectively. The morphology and structure of the prepared composites were characterized by scanning electron microscopy (SEM), light microscope (LM), transmission electron microscopy (TEM), dynamic light scattering (DLS), gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FTIR) and thermo gravimetric analysis (TGA). A possible formation mechanism of the PANI/Au and PANI/Pt core-shell nanocomposites was also proposed. The DC conductivity measurements at room temperature for the prepared nanocomposites showed very high conductivities due to presence of Au and Pt nanoparticles.

Synthesis and Characterization of Polyaniline ..

N2 - We synthesized multi-walled carbon nanotnbe (MWNT)/polyaniline (PANI) nanocomposites from an oxidative dispersion polymerization using poly (vinyl alcohol) (PVA) as a polymeric stabilizer. Purified MWNT whose metallic catalysis have been removed in acidic media was applied. The formation of nanocomposites and their morpholorgy were confirmed by both scanning electron microscopy (SEM) and transmission electrom microscopy (TEM). Electro-rhcological properties were farther characterized by a rotational rheometer equipped with a high vollage generator.

Synthesis and characterization of polyaniline ..

AB - We synthesized multi-walled carbon nanotnbe (MWNT)/polyaniline (PANI) nanocomposites from an oxidative dispersion polymerization using poly (vinyl alcohol) (PVA) as a polymeric stabilizer. Purified MWNT whose metallic catalysis have been removed in acidic media was applied. The formation of nanocomposites and their morpholorgy were confirmed by both scanning electron microscopy (SEM) and transmission electrom microscopy (TEM). Electro-rhcological properties were farther characterized by a rotational rheometer equipped with a high vollage generator.