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

Olga Voronina, Maria Malysheva, Liudmyla Nosach, Eugeny Voronin, Vladimir Gun’ko, Barbara Charmas, Jadwiga Skubiszewska-Zięba

Abstract


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


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

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References


Basic Characteristics of Aerosil. Technical bulletin Pigments, DEGUSSA AG, Frankfurt, 11, 35 (1997)

A.A. Chuiko, Medicinal Chemistry and Clinical Application of Silicon Dioxide; K.: Nauk. dumka, 2002 (in Russian).

O.O. Chuiko, O.O. Pentyuk, V.K. Pogorelyi, Enterosorbent Silics: Properties and Clinical Application. Chapt. 13. / Colloidal silica: fundamentals and applications / ed. H.E.Bergna, W.O.Roberts, Taylor & Francis Group, Boca Raton London New York, p. 177-186, 2006

O.O. Chuiko, O.O. Pentyuk, In Proc. of the Scientific Session of the Department of Chemistry of the NAS of Ukraine Dedicated to the 80th Anniversary of the NAS of Ukraine, 36-51, (1998) (in Ukrainian)

A. P. Legrand, The Surface Properties of Silicas, Wiley, New York, 470, 1998

R.K.Iler, The Chemistry of Silica: Solubility, Polymerization, Colloid and Surface Properties and Biochemistry of Silica. A Wiley-Interscience Publication New York-Chichester-Brisbano-Toronto, 1979

A.V. Kiselev, V.I. Lygin, Infrared Spectra of Surface Compounds, Wiley, New York, 1975

M.L. Hair, Infrared Spectroscopy in Surface Chemistry, New York, Marcell Dekker, p. 258, 1967

L.T. Zhuravlev, The surface chemistry of amorphous silica. Zhuravlev model // Colloids and Surfaces, A: Physicochemical and Engineering Aspects, 173, 1–38, (2000)

Adsorption from Solution at the Solid/Liquid Interfaces / Ed. G.D.Parfitt & C.H.Rochester, Academic Press London New York Paris, 1983

Yu.S. Lipatov, L.M. Sergeeva, Adsorption of polymers, K.: Nauk. dumka, 1992 (in Russian)

V.M. Gun'ko, O.E. Voronina, E.F. Voronin, V.I. Zarko, E.M. Pakhlov, R. Leboda, J. Skubiszewska-Zięba, W. Janusz, S. Chibowski, Nanosilica partially modified by hexamethyldisilazane in air, Polish J. Chem., 79, 1787-1804, (2005)

J.C.D. Brandt, G. Eglinton, Application of spectroscopy to orcanic chemistry. Oldbourn Press London, 1965

A.W. Adamson, and A.P. Gast, Physical Chemistry of Surfaces, 6th Edn, Wiley, New York, 1997

http://www.aerosil.com/product/aerosil/en/Pages/default.aspx

N.V. Guzenko, E.M. Pakhlov, N.A. Lipkovskaya, E.F. Voronin, Adsorption modification of high-disperse silica by polyvinylpyrrolidone, Zhurn. prikl. khimii, 74 (12), 1957-1961, (2001) (in Russian)

Yu.I. Tarasevich, Interaction of Globular Proteins with the Surface of Silicas, Teor. i eksperim.khimiya, 37 (2), 95-99, (2001) (in Russian)

G.V. Lisichkin, A.Y. Fadeev, A.A. Serdan, P.N. Nesterenko, P.G. Mingayiov, D.B. Furman, Chemystry of Surface Grafted Compounds / Ed. by G.V. Lisichkin, M.: fizmatlit, 529, 2003

V.M. Gun'ko, E.F. Voronin, L.V. Nosach, E.M. Pakhlov, O.E. Voronina, N.V. Guzenko, O.A. Kazakova, R. Leboda, J. Skubiszewska-Ziеba, Nanocomposites with fumed silica/poly(vinyl pyrrolidone) prepared at a low content of solvents, Appl. Surf. Sci., 253 (5), 2801–2811, (2006)

M.L. Malysheva, E.F. Voronin, E.M. Pakhlov, N.V. Guzenko, A study of water-soluble polymers adsorption onto surface of high-disperse silica by IR spectroscopy, 4-th Intern. Conf. CERECO-2003, Hungari, 337-344, 2003

V.M. Gun'ko, E.F. Voronin, L.V. Nosach, E.M. Pakhlov, N.V. Guzenko, R. Leboda, J. Skubiszewska-Zięba, Adsorption and migration of poly(vinyl pyrrolidone) at a surface of fumed silica, Ads. Sci. & Technol., 24 (2), 143-157, (2006)




DOI: http://dx.doi.org/10.17951/aa.2017.72.2.51-66
Date of publication: 2018-09-10 09:42:26
Date of submission: 2018-02-15 08:37:04


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Copyright (c) 2018 Olga Voronina, Maria Malysheva, Liudmyla Nosach, Eugeny Voronin, Vladimir Gun’ko, Barbara Charmas, Jadwiga Skubiszewska-Zięba