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Preparation of Self‐Assembled Carbon Network Structures with Magnetic Nanoparticles
Author(s) -
Bashmakov I. A.,
Govor L. V.,
Solovieva L. V.,
Parisi J.
Publication year - 2002
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20020201)203:3<544::aid-macp544>3.0.co;2-5
Subject(s) - nitrocellulose , sorption , nanoparticle , cobalt , polymer , distilled water , materials science , nickel , carbon fibers , oxalic acid , chemical engineering , inorganic chemistry , polymer chemistry , chemistry , nanotechnology , membrane , organic chemistry , composite material , composite number , biochemistry , adsorption , chromatography , engineering
Abstract Nanosized particles of different metals in a polymer matrix have attracted considerable interest in various research fields of chemistry, because of their physical and chemical catalytic properties and their application potential in nanoelectronics. In this paper, we present an experimental method for the preparation of self‐assembled honeycomb carbon network patterns with Co and Ni particles. Starting from a 2% carboxylated nitrocellulose solution in amyl acetate submerged in cooled distilled water, we already observe the above self‐organized uniform‐size net structure at the top of the water surface. The submergence of the carboxylated nitrocellulose network in 0.25‐ M water solution of cobalt acetate Co(CH 3 COO) 2 (or nickel acetate Ni(CH 3 COO) 2 ) for 1 h leads to the ion‐exchange introduction of inorganic cations Co 2+ (or Ni 2+ ) to a polymer matrix. In order to obtain samples with a large content of Co (or Ni) cations, we have carried out the sedimentation of the ion‐connected Co (or Ni) with the oxalic acid H 2 C 2 O 4 and, next, repeated the sorption of carboxylated nitrocellulose with the cations Co 2+ (or Ni 2+ ). For the fabrication of the Co (or Ni) nanoparticles, the carboxylated nitrocellulose networks, received after a first, second, and third sorption cycle, were heated under vacuum conditions (10 –5 mbar) at T ≥ 500°C for 2 h. The process of implementing the Co and Ni nanoparticles in the carbon network was systematically characterized with the help of measuring the specific resistivity in the temperature range from 4.2 to 295 K.