TY - JOUR
T1 - DBTL as neutral catalyst on TEOS/PDMS anticorrosive coating
AU - Hernández, Carmen Salazar
AU - Hernández, Mercedes Salazar
AU - Cerritos, Raúl Carrera
AU - Elorza, Enrique
AU - Mendoza-Miranda, Juan Manuel
AU - Navarro, Ricardo
N1 - Publisher Copyright:
© 2016, Springer Science+Business Media New York.
PY - 2017/2/1
Y1 - 2017/2/1
N2 - 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. Graphical Abstract: [InlineMediaObject not available: see fulltext.]
AB - 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. Graphical Abstract: [InlineMediaObject not available: see fulltext.]
KW - Anticorrosive coating
KW - DBTL
KW - Intra-grain corrosion
KW - PDMS
KW - TEOS
UR - http://www.scopus.com/inward/record.url?scp=84988932707&partnerID=8YFLogxK
U2 - 10.1007/s10971-016-4198-6
DO - 10.1007/s10971-016-4198-6
M3 - Artículo
SN - 0928-0707
VL - 81
SP - 405
EP - 412
JO - Journal of Sol-Gel Science and Technology
JF - Journal of Sol-Gel Science and Technology
IS - 2
ER -