http://www.cnr.it/ontology/cnr/individuo/prodotto/ID191727
Three-components organic-inorganic hybrid materials as protective coatings for wood: Optimisation, synthesis, and characterisation (Articolo in rivista)
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- Label
- Three-components organic-inorganic hybrid materials as protective coatings for wood: Optimisation, synthesis, and characterisation (Articolo in rivista) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.porgcoat.2012.01.013 (literal)
- Alternative label
Graziola F.; Girardi F.; Di Maggio R.; Callone E.; Miorin E.; Negri M.; Müller K.; Gross S. (2012)
Three-components organic-inorganic hybrid materials as protective coatings for wood: Optimisation, synthesis, and characterisation
in Progress in organic coatings (Print)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Graziola F.; Girardi F.; Di Maggio R.; Callone E.; Miorin E.; Negri M.; Müller K.; Gross S. (literal)
- Pagina inizio
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://www.sciencedirect.com/science/article/pii/S030094401200029X (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
- Note
- ISI Web of Science (WOS) (literal)
- Scopu (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1,8 : ISTM-CNR, Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo, 1, I-35131, Padova, Italy /
1-4,7 : Dipartimento di Ingegneria Dei Materiali e Tecnologie Industriali, Università di Trento, via Mesiano, 77, Trento, 38100, Italy /
5 : CNR-IENI, Corso Stati Uniti, 4, I-35127, Padova, Italy /
6 : CNR-IVALSA, S. Michele all'Adige (TN), Italy (literal)
- Titolo
- Three-components organic-inorganic hybrid materials as protective coatings for wood: Optimisation, synthesis, and characterisation (literal)
- Abstract
- The present work explores new solutions for the development of functional flame-resistant hybrid
coatings for wood, by using oxocluster-reinforced hybrid materials. Hybrid coatings and bulk materials
were produced by photopolymerisation of 3-methacryloxypropyltrimethoxysilane (MAPTMS) with
methylmethacrylate (MMA) in the presence of the dimeric oxocluster (Zr6O4(OH)4(OOCCH2CHCH2)12(n-
PrOH)]2·4(CH2CHCH2COOH), (Zr12), characterised by the presence of 12 vinylacetate groups for each
molecules. The molar ratios among silane, MMA monomer and oxocluster were changed to optimise the
best performing formulation. The final molar ratio chosen for the spray deposition of the coatings under
inert atmosphere and for the preparation of the bulk specimens was MAPTMS:MMA:Zr12 = 1:3:0.008.
Attenuated Total Reflectance-Fourier Transform Infra Red (ATR-FTIR) spectroscopy and Differential Scannig
Calorimetry (DSC) were used in time-resolved fashion to optimise the photopolymerisation time,
resulting to be 20 min. The polymerisation of the organic part and the condensation of the siloxane groups
were investigated by the combined use of DSC, Fourier Transform Infra-Red (FTIR) and solid state Nuclear
Magnetic Resonance (NMR) spectroscopies, showing that, whereas a complete organic polymerisation
degree was reached, the condensation of the silica component was not completed. Dynamical Mechanical
Spectroscopy (DMS) evidenced that: (1) the copolymerisation of the silane with the Zr12 oxocluster
without MMA yields materials with very poor mechanical thermo-properties; (2) the Zr12 oxocluster
copolymerised with MMA gives very stiff but fragile hybrids; (3) the ternary system yields instead flexible
materials, which are endowed with outstanding thermo-mechanical properties. The optimised formulation
was used for the deposition of coatings on wood (Larex), which were analysed by Scanning Electron
Microscopy (SEM), contact angles measurements and tested toward flame-resistance. (literal)
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