Deagglomeration of carbon nanotubes in aqueous solutions of melamineformaldehyde, naphthaleneformaldehyde, lignosulfonate plasticizers

  • Yu. I. Sementsov Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • E. O. Kovalska Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • N. T. Kartel Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • O. Yu. Chunihin Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine
DOI: https://doi.org/10.15407/hftp07.02.202
Keywords: multiwall carbon nanotubes (CNTS), the CNT agglomerates, stable dispersion of CNTS, surfactants, plasticizers

Abstract

Carbon nanotubes (CNTs) are the best material for reinforcing matrices of different nature due to the unique high specific strength characteristics and size form factor (the ratio of length to diameter), which is >  103. One of the most inexpensive and productive CNT production methods is the method of catalytic chemical vapor deposition (CCVD). If the catalyst is successfully chosen, this method gives CNTs of good quality and purity (virtually no amorphous carbon). However, CNTs grow as intertwined agglomerates. Efficacy reinforcement matrix, including building materials, is determined by the degree of a homogeneous distribution of CNTs. This can be achieved of previously obtaining stable dispersion of CNTS in the liquid. Deagglomeration has been studied of multiwall carbon nanotubes (CNT) in aqueous melamineformaldehyde, naphtaleneformaldehyde, lignosulfonate plasticizers used in buildings mixes, and their dispersions have been obtained of different stability. The influence of the solid phase of CNT on the aggregative stability of aqueous suspensions plasticizer-CNT has been shown. Suspension based on melamineformaldehyde solution with 1.0 wt. % CNT was stable in time. Suspensions based on solution of naphtaleneformaldehyde containing 0.5 and 1.0 wt. % CNT were practically stable too. It has been revealed enlargement of particles of lignosulfonate plasticizer with increasing content of CNT; their presence in an amount of 0.5-1.5 wt. % destabilize the stock solution. It has been found that the polydispersity coefficient for systems «plasticizer-CNT» is markedly different from the value at which the suspension is considered monodisperse.

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How to Cite
SEMENTSOV, Y. I.; KOVALSKA, E. O.; KARTEL, N. T.; CHUNIHIN, O. Y. Deagglomeration of carbon nanotubes in aqueous solutions of melamineformaldehyde, naphthaleneformaldehyde, lignosulfonate plasticizers. Chemistry, Physics and Technology of Surface, v. 7, n. 2, p. 202-213, 11.
Issue
Vol. 7 No. 2 (2016): Chemistry, Physics and Technology of Surface / Himia, Fizika ta Tehnologia Poverhni
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