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DC Field | Value | Language |
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dc.contributor.author | Hammer, Peter | - |
dc.contributor.author | Dos Santos, F. C. | - |
dc.contributor.author | Cerrutti, B. M. | - |
dc.contributor.author | Pulcinelli, Sandra Helena | - |
dc.contributor.author | Santilli, Celso Valentim | - |
dc.date.accessioned | 2014-05-27T11:28:45Z | - |
dc.date.accessioned | 2016-10-25T18:46:03Z | - |
dc.date.available | 2014-05-27T11:28:45Z | - |
dc.date.available | 2016-10-25T18:46:03Z | - |
dc.date.issued | 2013-04-01 | - |
dc.identifier | http://dx.doi.org/10.1016/j.porgcoat.2012.11.015 | - |
dc.identifier.citation | Progress in Organic Coatings, v. 76, n. 4, p. 601-608, 2013. | - |
dc.identifier.issn | 0300-9440 | - |
dc.identifier.uri | http://hdl.handle.net/11449/74940 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/74940 | - |
dc.description.abstract | Siloxane-polymethyl methacrylate hybrid films containing functionalized multiwall carbon nanotubes (CNTs) were deposited by dip-coating on carbon steel substrates from a sol prepared by radical polymerization of methyl methacrylate and 3-methacryloxy propyl-trimethoxysilane, followed by hydrolytic co-polycondensation of tetraethoxysilane. The correlation between the structural properties and corrosion protection efficiency was studied as a function of the molar ratio of nanotubes carbon to silicon, varied in the range between 0.1% and 5%. 29Si nuclear magnetic resonance and thermogravimetric measurements have shown that hybrids containing carbon nanotubes have a similar degree of polycondensation and thermal stability as the undoped matrix and exhibit and excellent adhesion to the substrate. Microscopy and X-ray photoelectron spectroscopy results revealed a very good dispersion of carbon nanotubes in the hybrid matrix and the presence of carboxylic groups allowing covalent bonding with the end-siloxane nodes. Potentiodynamic polarization curves and electrochemical impedance spectroscopy results demonstrate that CNTs containing coatings maintain the excellent corrosion protection efficiency of the hybrids, showing even a superior performance in acidic solution. The nanocomposite structure acts as efficient corrosion barrier, increasing the total impedance by 4 orders of magnitude and reducing the current densities by more than 3 orders of magnitude, compared to the bare steel electrode. © 2013 Elsevier B.V. All rights reserved. | en |
dc.format.extent | 601-608 | - |
dc.language.iso | eng | - |
dc.source | Scopus | - |
dc.subject | Carbon nanotubes | - |
dc.subject | Corrosion protection | - |
dc.subject | Electrochemical properties | - |
dc.subject | Hybrid coatings | - |
dc.subject | Photoelectron spectroscopy | - |
dc.subject | Sol-gel process | - |
dc.subject | Acidic solutions | - |
dc.subject | Bare steel | - |
dc.subject | Carbon steel substrates | - |
dc.subject | Carboxylic group | - |
dc.subject | Corrosion barriers | - |
dc.subject | Covalent bonding | - |
dc.subject | Dip coating | - |
dc.subject | Functionalized | - |
dc.subject | Hybrid coating | - |
dc.subject | Hybrid film | - |
dc.subject | Hybrid matrix | - |
dc.subject | Molar ratio | - |
dc.subject | Nano-composite structure | - |
dc.subject | Orders of magnitude | - |
dc.subject | Polymerization of methyl methacrylate | - |
dc.subject | Potentiodynamic polarization curves | - |
dc.subject | Protection efficiency | - |
dc.subject | Similar degree | - |
dc.subject | Thermogravimetric measurement | - |
dc.subject | Carbon steel | - |
dc.subject | Coatings | - |
dc.subject | Corrosion resistance | - |
dc.subject | Electrochemical impedance spectroscopy | - |
dc.subject | Esters | - |
dc.subject | Photoelectrons | - |
dc.subject | Polycondensation | - |
dc.subject | Polymethyl methacrylates | - |
dc.subject | Sols | - |
dc.subject | Substrates | - |
dc.subject | X ray photoelectron spectroscopy | - |
dc.title | Carbon nanotube-reinforced siloxane-PMMA hybrid coatings with high corrosion resistance | en |
dc.type | outro | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.description.affiliation | Instituto de Química UNESP-Univ Estadual Paulista, 14800-900 Araraquara, SP | - |
dc.description.affiliationUnesp | Instituto de Química UNESP-Univ Estadual Paulista, 14800-900 Araraquara, SP | - |
dc.identifier.doi | 10.1016/j.porgcoat.2012.11.015 | - |
dc.identifier.wos | WOS:000316425000012 | - |
dc.rights.accessRights | Acesso restrito | - |
dc.relation.ispartof | Progress in Organic Coatings | - |
dc.identifier.scopus | 2-s2.0-84874106317 | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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