Electric polarizability dispersion of alumina particles with adsorbed carboxymethyl cellulose

Zhivkov, Alexandar M.; Hristov, Rosen

doi:10.1039/c3ra40431e

Cited by 7 publications

(2 citation statements)

References 67 publications

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“…4). However, this formation is limited because of the presence of adsorbed (condensed) Na + ions, which decrease the effective charge density of the polymer [19]. Fig.…”

Section: Fourier Transform-infrared Spectroscopy Analysismentioning

confidence: 99%

“…the rigidity of the glucose rings and the rotation impossibility around the C−O−C bonds between the adjacent rings because of β-1,4-linkage. Both of the factors determine the rigidity of the chain backbone [19]. This is not necessarily a sign of the uselessness of these materials (B/CMC/Na composites) in the foundry technology, but it should already be noted that such type of a structure will adversely affect certain technological properties of moulding sands containing these additives, e.g.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

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Archives of Foundry Engineering

Cukrowicz

Grabowski

Kaczmarska

et al. 2020

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The study investigates the effect of the organic compound representing the cellulose derivative -sodium salt of carboxymethyl cellulose (CMC/Na) on the structure of the main component of bentonite (B) -montmorillonite (MMT). Structural analysis revealed that the CMC/Na of different viscosity interacts with the mineral only via surface adsorption, causing at the same time partial or full delamination of its layered structure. This was confirmed by the XRD diffraction tests. Such polymer destructive influence on the structure of the modified main component of the bentonite limits the use of its composites as an independent binder in moulding sand technology, but does not exclude it from acting as an additive being a lustrous carbon carrier. According to the IR spectra of the B/CMC/Na materials, it can be stated that the interaction between the organic and inorganic parts is based on the formation of hydrogen bonds. That kind of the interpretation applies especially to the MMT modified in the bentonite with a lower viscosity polymer. The characteristics of the main IR absorption bands for composites with a higher viscosity polymer indicates the formation of less stable structures suggesting the random nature of the hydrogen bonds formation.

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“…4). However, this formation is limited because of the presence of adsorbed (condensed) Na + ions, which decrease the effective charge density of the polymer [19]. Fig.…”

Section: Fourier Transform-infrared Spectroscopy Analysismentioning

confidence: 99%

Section: X-ray Diffraction Analysismentioning

confidence: 99%