13 Result(s)
within
Miroslava Trchová
Chemistry
Chemistry/Food Science, general
Industrial Chemistry/Chemical Engineering
Materials Science, general
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Article
Polyaniline-coated cellulose fibers decorated with silver nanoparticles
Cellulose fibers of 20 μm in diameter and aspect ratio of 2 or 10 were coated with protonated polyaniline (PANI) during the oxidation of aniline hydrochloride with ammonium peroxydisulfate in an aqueous medium...
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Article
Reduction of silver nitrate by polyaniline nanotubes to produce silver-polyaniline composites
Polyaniline (PANI) nanotubes were prepared by oxidation of aniline in 0.4 M acetic acid. They were subsequently used as a reductant of silver nitrate in 1 M nitric acid, water or 1 M ammonium hydroxide at vari...
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Article
The role of acidity profile in the nanotubular growth of polyaniline
Conditions of polyaniline (PANI) nanotubes preparation were analyzed. Aniline was oxidized with ammonium peroxydisulfate in 0.4 M acetic acid. There are two subsequent oxidation steps and the products were col...
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Article
Spectroscopy of thin polyaniline films deposited during chemical oxidation of aniline
Any surface immersed in the aqueous reaction mixture used for the preparation of polyaniline becomes coated with a polyaniline film of submicrometre thickness. In this way, various materials can be modified by...
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Article
Influence of ethanol on the chain-ordering of carbonised polyaniline
Polyaniline (PANI) was prepared by the oxidation of aniline hydrochloride with ammonium peroxydisulphate in water or in a water-ethanol mixture. In the presence of ethanol, PANI nanotubes and nanorods were obs...
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Article
Multi-wall carbon nanotubes with nitrogen-containing carbon coating
Polyaniline coating was deposited on the surface of multi-wall carbon nanotubes of Russian and Taiwanese origin in situ during the polymerization of aniline. The deposited polyaniline film was subsequently car...
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Article
Preparation of polyaniline in the presence of polymeric sulfonic acids mixtures: the role of intermolecular interactions between polyacids
Polyaniline (PANI) was synthesized by chemical oxidation of aniline in the presence of mixtures of water-soluble poly(sulfonic acids) of different nature. Under these conditions, the use of polyacid templates ...
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Article
Coaxial conducting polymer nanotubes: polypyrrole nanotubes coated with polyaniline or poly(p-phenylenediamine) and products of their carbonisation
Polypyrrole nanotubes were prepared by the oxidation of pyrrole with iron(III) chloride in a reaction mixture containing methyl orange. They were subsequently coated with polyaniline or poly(p-phenylenediamine) i...
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Article
Explosive hazards in polyaniline chemistry
Polyaniline, a conducting polymer, is prepared by the oxidation of aniline with various oxidants. When using ammonium peroxydisulfate or hydrogen peroxide at high concentrations, the temperature may exceed boi...
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Article
Reduction of silver ions to silver with polyaniline/poly(vinyl alcohol) cryogels and aerogels
The macroporous conducting polymer cryogels were prepared by the oxidation of aniline hydrochloride in the frozen aqueous solutions of poly(vinyl alcohol) at − 24 °C. Corresponding polyaniline aerogels support...
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Article
Conducting polypyrrole nanotubes: a review
Polypyrrole nanotubes rank among the most conducting polymer materials. The role of the templates in the formation of nanotubes is analysed and various models are discussed. Special attention has been paid to ...
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Article
Conducting polypyrrole-coated macroporous melamine sponges: a simple toy or an advanced material?
The present feature article offers a concise overview of recent research progress of the authors working in the design of macroporous conducting materials represented by polypyrrole-coated melamine sponges. Th...
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Article
Nitrogen-containing carbon enriched with tungsten atoms prepared by carbonization of polyaniline
Polyaniline (PANI) salts with tungstosilicic (TSA) and phosphotungstic acids (PTA) were prepared by reprotonation of PANI base. Partial protonation of the precursor base was confirmed by Raman spectroscopy and...
