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Inorganic-organic hybrid materials with zirconium oxoclusters as protective coatings on aluminium alloys (Articolo in rivista)
- Type
- Label
- Inorganic-organic hybrid materials with zirconium oxoclusters as protective coatings on aluminium alloys (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.porgcoat.2008.02.001 (literal)
- Alternative label
Girardi, F.; Graziola, F.; Aldighieri, P.; Fedrizzi, L.; Gross, S.; Di Maggio, R. (2008)
Inorganic-organic hybrid materials with zirconium oxoclusters as protective coatings on aluminium alloys
in Progress in organic coatings (Print)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Girardi, F.; Graziola, F.; Aldighieri, P.; Fedrizzi, L.; Gross, S.; Di Maggio, R. (literal)
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- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- [Graziola, Francesco; Di Maggio, Rosa] Univ Trent, Dipartimento Ingn Mat & Tecnol Ind, I-38100 Trento, Italy.
[Girardi, Fabrizio; Graziola, Francesco; Gross, Silvia] Univ Padua, Dipartimento Sci Chim, ISTM CNR, I-35131 Padua, Italy.
[Girardi, Fabrizio; Graziola, Francesco; Gross, Silvia] INSTM UdR Padova, I-35131 Padua, Italy.
[Aldighieri, Paolo; Fedrizzi, Lorenzo] Univ Udine, Dipartimento Sci & Tecnol Chim, I-33100 Udine, Italy. (literal)
- Titolo
- Inorganic-organic hybrid materials with zirconium oxoclusters as protective coatings on aluminium alloys (literal)
- Abstract
- Inorganic-organic hybrid materials are attracting a strong scientific
interest mainly for their outstanding inherent mechanical and thermal
properties, which can be traced back to the intimate coupling of both
inorganic and organic components. By carefully choosing the
experimental parameters used for their synthesis, chemically and
thermally stable acrylate-based hybrid material embedding the zirconium
oxocluster Zr4O4(OMC)(12), where OMc=CH2=C(CH3)C(O)O, can be deposited
as UV-cured films on aluminium alloys.
In particular, the molar ratios between the oxocluster and the monomer,
the polymerisation time, the amount of photo-initiator and the
deposition conditions, by using an home-made. spray-coating equipment,
were optimised in order to obtain the best performing layers in terms
of transparency and hardness to coat aluminium alloy (AA1050, AA6060
and AA2024) sheets. Furthermore, it was also evaluated whether the
hybrid coatings behave as barrier to corrosion.
Several coated samples were prepared and characterised. Environmental
scanning electronic microscopy (ESEM) and scratch test were used to
investigate the morphology of the films and to evaluate their scratch
resistance, respectively. Electrochemical impedance spectroscopy (EIS)
was performed in order to evaluate if the coatings actually protect the
metallic substrate from corrosion.
In order to measure shear storage modulus (G') and loss modulus (G\") of
the materials used for coatings, bulk samples were also obtained by
UV-curing of the precursors solution. Dynamical mechanical thermal
analysis (DMTA) was performed in shear mode on cured disks of both the
hybrid materials and pristine polymer for comparison. The values of T-g
were read off as the temperatures of peak of loss modulus. The length
and mass of all the samples were measured before and after the DMTA
analysis, so that the shrinkage of the materials in that temperature
range was exactly evaluated. (C) 2008 Elsevier B.V. All rights reserved. (literal)
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