A role of free silanol groups of nanosilica surface in interaction with poly(vinyl pyrrolidone)

• Authors: Olga Voronina , Maria Malysheva , Liudmyla Nosach , Eugeny Voronin , Vladimir Gun’ko , Barbara Charmas , Jadwiga Skubiszewska-Zięba
• Languages of publication: EN

Abstracts

EN

In this work, a role of the number of free silanol groups at a nanosilica surface (specific surface area SBET = 250 m2/g, initial amount of silanols αОН = 0.60-0.62 mmol/g) was analyzed in interaction with poly(vinyl pyrrolidone) (PVP) vs. the degree (QTMS) of silica hydrophobization by hexamethyldisilazane at 100 oC. The value of QTMS was 0.07, 0.42, 0.67, 0.81, 0.82, and 1.0. Adsorption of PVP onto a nanosilica surface was carried out from a water and water-ethanol (1:1) solutions of the polymer. It was shown that free silanol groups play a crucial role in the adsorption of poly(vinyl pyrrolidone). The value of the maximal adsorption (monolayer capacity) on completely hydrophobic nanosilica surface is approximately by 6.5 times lower than that for unmodified nanosilica

Keywords

EN

Nanosilica, Silanol groups, Hydrophobization, Hexamethyldisilazane, Poly(vinyl pyrrolidone) adsorption

• Publisher: Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
• Journal: Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
• Year: 2017
• Volume: 72
• Issue: 2

Dates

published

2017

online

2018-09-10

Contributors

author

Olga Voronina

author

Maria Malysheva

author

Liudmyla Nosach

author

Eugeny Voronin

author

Vladimir Gun’ko

author

Barbara Charmas

author

Jadwiga Skubiszewska-Zięba

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Identifiers

DOI

10.17951/aa.2017.72.2.51-66