Molecular modeling studies of interactions between sodium polyacrylate polymer and calcite surface

A Ylikantola, J. Linnanto, J. Knuutinen, A. Oravilahti, Martti Toivakka

    Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

    31 Sitaatiot (Scopus)

    Abstrakti

    The interactions between calcite pigment and sodium polyacrylate dispersing agent, widely used in papermaking as paper coating components, were investigated using classical force field and quantum chemical approaches. The objective was to understand interactions between the calcite surface and sodium polyacrylate polymer at 300 K using molecular dynamics simulations. A quantum mechanical ab initio Hartree-Fock method was also used to obtain detailed information about the sodium polyacrylate polymer structure. The effect of water molecules (moisture) on the interactions was also examined. Calculations showed that molecular weight, branching and the orientation of sodium polyacrylate polymers influence the interactions between the calcite surface and the polymer. The force field applied, and also water molecules, were found to have an impact on all systems studied. Ab initio Hartree-Fock calculations indicated that there are two types of coordination between sodium atoms and carboxylate groups of the sodium polyacrylate polymer, inter-and intra-carboxylate group coordination. In addition, ab initio Hartree-Fock calculations of the structure of the sodium polyacrylate polymer produced important information regarding interactions between the polymers and carboxylated styrene-butadiene latex particles.
    AlkuperäiskieliEi tiedossa
    Sivut43–52
    Sivumäärä10
    JulkaisuApplied Surface Science
    Vuosikerta276
    DOI - pysyväislinkit
    TilaJulkaistu - 2013
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

    Keywords

    • Adsorption
    • Calcite surface
    • Force field method
    • Molecular modeling
    • Sodium polyacrylate polymer

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