Issue 12, 2012
From the journal:

New Journal of Chemistry

New calcium alkoxides for consolidation of carbonate rocks. Influence of precursors' characteristics on morphology, crystalline phase and consolidation effects

Franco Ossola,a   Patrizia Tomasin,*a   Chiara De Zorzi,a   Naida El Habra,a   Matteo Chiuratoa  and  Monica Favaroa  

* Corresponding authors

a Istituto di Chimica Inorganica e delle Superfici, C.N.R., Corso Stati Uniti 4, 35127 Padova, Italy
E-mail: patrizia.tomasin@cnr.it

Abstract

New ambient temperature liquid calcium alkoxides, [Ca(O(CH2CH2O)3CH3)2] (1) and [Ca(O(CH2CH2O)3CH2CH3)2] (2), together with [Ca(OCH2C(CH3)3)2] (3), were synthesised by reaction of ammonia-activated calcium with the appropriate alcohol. Their potentiality as stone consolidant products was investigated and compared with those of other alkoxides: [Ca(OCH2CH3)2(CH3CH2OH)4] (4), [Ca(OCH3)2] (5), [{Ca(OCH2CH2OCH3)2}9] (6), already described in the literature. Reaction of 1–3 with the atmosphere was studied, final products analysed and kinetic pathways investigated. The reaction produces CaCO3 and the vaterite/calcite ratios observed in the coatings generated from isopropyl alcohol solutions of 1–6 were found to considerably vary with the alkoxide precursor, which has a strong influence also on the morphology of the produced films. Furthermore, their efficiency as stone consolidants was tested by ultrasound measurements.

Graphical abstract: New calcium alkoxides for consolidation of carbonate rocks. Influence of precursors' characteristics on morphology, crystalline phase and consolidation effects

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Article information

DOI
https://doi.org/10.1039/C2NJ40708F
Article type
Paper
Submitted
09 Aug 2012
Accepted
08 Oct 2012
First published
08 Oct 2012

New J. Chem., 2012,36, 2618-2624

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New calcium alkoxides for consolidation of carbonate rocks. Influence of precursors' characteristics on morphology, crystalline phase and consolidation effects

F. Ossola, P. Tomasin, C. De Zorzi, N. El Habra, M. Chiurato and M. Favaro, New J. Chem., 2012, 36, 2618 DOI: 10.1039/C2NJ40708F

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