Surface properties of nanozirconia modified by ionic polyacrylamide – Impact of polymer functional groups type

•PAM adsorption influence on the nanozirconia suspension stability was examined.•Turbidimetry, spectrophotometry, potentiometric titration and microelectrophoresis were applied.•Solution pH and ionic groups type affect PAM adsorption mechanism on the ZrO2 surface.•Conformational changes of adsorbed...

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Bibliographic Details
Published in:Materials letters 2017-10, Vol.205, p.32-35
Main Authors: Wiśniewska, Małgorzata, Chibowski, Stanisław, Urban, Teresa, Nosal-Wiercińska, Agnieszka, Gołębiowska, Beata, Szabelska, Anna
Format: Article
Language:English
Subjects:
Adsorption
Biomedical materials
Cations
Electrokinetics
Functional groups
Materials science
Nano-biomaterial
Nanomaterials
Nanozirconia
Polyacrylamide
Polymer conformation
Polymer-nanooxide composites
Polymeric film structure
Spectrophotometry
Stability
Surface properties
Titration
Turbidimetry
Zirconium
Zirconium dioxide
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Summary:•PAM adsorption influence on the nanozirconia suspension stability was examined.•Turbidimetry, spectrophotometry, potentiometric titration and microelectrophoresis were applied.•Solution pH and ionic groups type affect PAM adsorption mechanism on the ZrO2 surface.•Conformational changes of adsorbed macromolecules cause changes in suspension stability.•The greatest impact of ZrO2 suspension stability is found for cationic PAM at pH 6. The effects of the type of functional groups of ionic polyacrylamide (PAM) and solution pH on the adsorption, electrokinetic and stability properties of aqueous nanozirconia suspension were examined. The spectrophotometry, potentiometric titration, doppler laser electrophoresis and turbidimetry were applied for this purpose. It was demonstrated that adsorption of anionic PAM (containing carboxyl groups) decreases with the pH rise, whereas in the case of cationic PAM (with quaternary amine groups) it increases. The greatest impact of ZrO2 suspension stability is found for cationic PAM at pH 6, at which electrosteric stabilization mechanism is dominant.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2017.06.054