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Food Microbiol. 2015 Feb;45(Pt A):135-46. doi: 10.1016/j.fm.2013.12.002. Epub 2013 Dec 21.

Silicification of wood adopted for barrel production using pure silicon alkoxides in gas phase to avoid microbial colonisation.

Author information

1
Technology Transfer Centre, Edmund Mach Foundation, Via E. Mach 1, 38010 San Michele all'Adige, TN, Italy. Electronic address: raffaele.guzzon@fmach.it.
2
Technology Transfer Centre, Edmund Mach Foundation, Via E. Mach 1, 38010 San Michele all'Adige, TN, Italy.
3
Department of Materials Engineering and Industrial Technologies, University of Trento, Via Mesiano 77, 38123 Trento, Italy.

Abstract

The paper presents a new approach, covering wood with silica-based material in order to protect it from spoilage due to microbial colonisation and avoiding the loss of the natural features of the wood. Wood specimens derived from wine barrels were treated with methyltriethoxysilane in gas phase, leading to the deposition of a silica nanofilm on the surface. (29)Si and (13)C solid state Nuclear Magnetic Resonance and Scanning Electron Microscope-Energy Dispersive X-ray analysis observations showed the formation of a silica polymeric film on the wood samples, directly bonding with the wood constituents. Inductively Coupled Plasma-Mass Spectroscopy quantification of Si showed a direct correlation between the treatment time and silica deposition on the surface of the wood. The silica-coated wood counteracted colonisation by the main wine spoilage microorganisms, without altering the migration from wood to wine of 21 simple phenols measured using a HPLC-Electrochemical Coulometric Detection.

KEYWORDS:

Barrels; Dekkera/Brettanomyces; Silica-based material; Solid state NMR; Sol–gel; Wine spoilage

PMID:
25481070
DOI:
10.1016/j.fm.2013.12.002
[Indexed for MEDLINE]

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