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Journal of Sol-Gel Science and Technology

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28-09-2016 | Original Paper: Functional coatings, thin films and membranes (including deposition techniques)

DBTL as neutral catalyst on TEOS/PDMS anticorrosive coating

Authors: Carmen Salazar Hernández, Mercedes Salazar Hernández, Raúl Carrera Cerritos, Enrique Elorza, Juan Manuel Mendoza-Miranda, Ricardo Navarro

Published in: Journal of Sol-Gel Science and Technology | Issue 2/2017

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Abstract

Dibutil-dilaurate tin was proposed as a neutral poly-condensation catalyst for the formation of organically modified ceramics between the TEOS and poly-di-methyl-di-siloxane, which was named organic modified silane-dibutil-dilaurate tin. The properties of this material were comparison with an organic modified silane synthetized under similar condition but with acid catalyst. Infrared spectroscopy and NMR 29Si indicated the chemical bonding between the polymer and the silica fragments formed by the TEOS, when dibutil-dilaurate tin was used as catalyst. Also, organic modified silanes were applied on an aluminum surface (Al-6061) as an anticorrosive coating; SEM showed that organic modified silane-dibutil-dilaurate tin coating was deposited homogeneously on the metal substrate; while organic modified silane-acid form a heterogeneous film. Anticorrosive behavior was assessed by gravimetric corrosive tests and it was compared with a commercial polymer film. The results showed an excessive wear on the metal surface by means of intra-grain corrosion; the corrosion rate was determined as: organic modified silane-dibutil-dilaurate tin < organic modified silane-acid< polymer coating < aluminum surface.

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Title: DBTL as neutral catalyst on TEOS/PDMS anticorrosive coating
Authors: Carmen Salazar Hernández
Mercedes Salazar Hernández
Raúl Carrera Cerritos
Enrique Elorza
Juan Manuel Mendoza-Miranda
Ricardo Navarro
Publication date: 28-09-2016
Publisher: Springer US
Published in: Journal of Sol-Gel Science and Technology / Issue 2/2017
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI: https://doi.org/10.1007/s10971-016-4198-6

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