European Journal of Chemistry 2013, 4(4), 343-349 | doi: https://doi.org/10.5155/eurjchem.4.4.343-349.835 | Get rights and content






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Investigation of hydrolysis and condensation of methyltriethoxysilane in aqueous systems


Jan Kurjata (1,*) , Krystyna Rozga-Wijas (2) , Wlodzimierz Stanczyk (3)

(1) Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
(2) Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
(3) Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
(*) Corresponding Author

Received: 24 May 2013 | Revised: 26 Jun 2013 | Accepted: 26 Jun 2013 | Published: 31 Dec 2013 | Issue Date: December 2013

Abstract


An effective synthesis of methylethoxysilanes and emulsification of methyltriethoxysilane is described. Hydrolysis and condensation products of methyltriethoxysilane were identified and studied using 29Si NMR, mass spectrometry and infrared spectroscopy. The presented analyses are important from practical point of view, as the emulsion in question is used for hydrophobization of building materials and soil. The most striking finding is high stability of the low molecular products of hydrolysis - methylsilanetriol [MeSi(OH)3] and its dimer [(OH)2(Me)SiOSi(Me)(OH)2]. All of which were still present in the aqueous medium, after 40 days of storage at ambient conditions. This finding suggests that condensation processes leading to the formation of polymer network are slow in the emulsion and a large number of reactive hydroxyl groups are present in the system allowing for the effective hydrophobization of mineral material.

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Keywords


Siloxanes; Hydrolysis; Ethoxysilanes Hydrophobization; Silane aqueous emulsions; Condensation intermediates

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DOI: 10.5155/eurjchem.4.4.343-349.835

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Funding information


National Centre for Science project (N N209 09044), Poland

Citations

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[1]. Christoph Rücker, Klaus Kümmerer
Environmental Chemistry of Organosiloxanes
Chemical Reviews  115(1), 466, 2015
DOI: 10.1021/cr500319v
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[2]. Manish K. Mishra, Christian Schöttle, Antony Van Dyk, Kebede Beshah, James C. Bohling, John A. Roper, Clayton J. Radke, Alexander Katz
Wettability Reversal of Hydrophobic Pigment Particles Comprising Nanoscale Organosilane Shells: Concentrated Aqueous Dispersions and Corrosion-Resistant Waterborne Coatings
ACS Applied Materials & Interfaces  11(47), 44851, 2019
DOI: 10.1021/acsami.9b14898
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How to cite


Kurjata, J.; Rozga-Wijas, K.; Stanczyk, W. Eur. J. Chem. 2013, 4(4), 343-349. doi:10.5155/eurjchem.4.4.343-349.835
Kurjata, J.; Rozga-Wijas, K.; Stanczyk, W. Investigation of hydrolysis and condensation of methyltriethoxysilane in aqueous systems. Eur. J. Chem. 2013, 4(4), 343-349. doi:10.5155/eurjchem.4.4.343-349.835
Kurjata, J., Rozga-Wijas, K., & Stanczyk, W. (2013). Investigation of hydrolysis and condensation of methyltriethoxysilane in aqueous systems. European Journal of Chemistry, 4(4), 343-349. doi:10.5155/eurjchem.4.4.343-349.835
Kurjata, Jan, Krystyna Rozga-Wijas, & Wlodzimierz Stanczyk. "Investigation of hydrolysis and condensation of methyltriethoxysilane in aqueous systems." European Journal of Chemistry [Online], 4.4 (2013): 343-349. Web. 23 Jan. 2020
Kurjata, Jan, Rozga-Wijas, Krystyna, AND Stanczyk, Wlodzimierz. "Investigation of hydrolysis and condensation of methyltriethoxysilane in aqueous systems" European Journal of Chemistry [Online], Volume 4 Number 4 (31 December 2013)

DOI Link: https://doi.org/10.5155/eurjchem.4.4.343-349.835

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