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DBTL as neutral catalyst on TEOS/PDMS anticorrosive coating

  • Original Paper: Functional coatings, thin films and membranes (including deposition techniques)
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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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Acknowledgements

The authors wish to acknowledge the financial support of the CONACyT through grant CB-186327/2012 register as SIP-2013-Re/099, as well as to Ernan Hernández Cantero for her technical support in this work.

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Authors and Affiliations

  1. Unidad Profesional Interdisciplinaria de Ingeniería Campus Guanajuato, Instituto Politécnico Nacional, Av. Mineral de Valenciana No. 200 Col. Fracc. Industrial Puerto Interior, C.P. 36275, Silao de la Victoria, Guanajuato, Mexico

    Carmen Salazar Hernández, Raúl Carrera Cerritos & Juan Manuel Mendoza-Miranda

  2. Departamento en Ingeniería en Minas, Metalurgia y Geología, Universidad de Guanajuato, Ex Hacienda de San Matías S/N Colonia San Javier, C.P.36020, Guanajuato, Gto, Mexico

    Mercedes Salazar Hernández & Enrique Elorza

  3. División de Ciencias Naturales y Exactas, Universidad de Guanajuato, La Venada S/N, C.P. 36000, Guanajuato, Gto, Mexico

    Ricardo Navarro

Authors
  1. Carmen Salazar Hernández
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  2. Mercedes Salazar Hernández
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  3. Raúl Carrera Cerritos
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  4. Enrique Elorza
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  5. Juan Manuel Mendoza-Miranda
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  6. Ricardo Navarro
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Correspondence to Carmen Salazar Hernández or Mercedes Salazar Hernández.

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Hernández, C.S., Hernández, M.S., Cerritos, R.C. et al. DBTL as neutral catalyst on TEOS/PDMS anticorrosive coating. J Sol-Gel Sci Technol 81, 405–412 (2017). https://doi.org/10.1007/s10971-016-4198-6

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  • DOI: https://doi.org/10.1007/s10971-016-4198-6

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