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https://hdl.handle.net/1822/31253
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Campo DC | Valor | Idioma |
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dc.contributor.author | Fernandes, M. | por |
dc.contributor.author | Paz, Filipe A. Almeida | por |
dc.contributor.author | Mano, J. F. | por |
dc.contributor.author | Bermudez, V. de Zea | por |
dc.date.accessioned | 2014-11-25T11:22:57Z | - |
dc.date.available | 2014-11-25T11:22:57Z | - |
dc.date.issued | 2014-06 | - |
dc.date.submitted | 2014-11 | - |
dc.identifier.citation | Fernandes M., Almeida Paz F. A., Mano J. F., de Zea Bermudez V. Investigation of calcium carbonate precipitated in the presence of alkanols, Crystal Research and Technology, Vol. 49, Issue 6, pp. 418–430, doi:10.1002/crat.201400059, 2014 | por |
dc.identifier.issn | 0232-1300 | por |
dc.identifier.uri | https://hdl.handle.net/1822/31253 | - |
dc.description.abstract | The influence of myristyl alcohol (CH3(CH2)13OH), cetyl alcohol (CH3(CH2)15OH) and behenyl alcohol (CH3(CH2)21OH) on the structure, morphology, size and surface properties of calcium carbonate (CaCO3) has been investigated. Changes in the nature of the washing solvent, in the CnOH/Ca2+ and CO32−/Ca2+ molar ratios and in temperature have been also evaluated. The sole polymorph produced was rhombohedral calcite. At room temperature, while microspheres composed of submicrocubes were produced at a high molar ratio CO32−/Ca2+ and low CH3(CH2)15OH concentration, a stoichiometric molar ratio CO32−/Ca2+ and high CH3(CH2)15OH concentration induced the formation of microcubes and microboxes. In the presence of this alkanol (12 % molar) a significant enhancement of the water contact angle (ca. 40 °) resulted in a sample obtained with a stoichiometric CO32−/Ca2+ ratio. These results emphasize the key role played by the three non-ionic surfactants in the formation of materials with variable crystal shape and wettability and thus technological interest for a range of applications. | por |
dc.description.sponsorship | This work was financially supported by Fundacao para a Ciencia e a Tecnologia (FCT) (contracts PTDC/CTM-BPC/112774/2009, Pest-C/CTM/LA0011/2013, Pest-OE/QUI/UI0616/2014, PTDC/FIS/115048/2009 and PTDC/CTM-BIO/1814/2012) and COST Action MP1202 "Rational design of hybrid organic-inorganic interfaces". M. Fernandes thanks FCT for a grant (SFRH/BPD/78919/2011). The authors thank Nuno Oliveira (3B's Research Group of the University of Minho, Portugal) for the contact angle measurements, and Professor Hugh Burrows (Department of Chemistry of the University of Coimbra, Portugal) for fruitful discussions. | por |
dc.language.iso | eng | por |
dc.publisher | Wiley-VCH Verlag | por |
dc.rights | restrictedAccess | por |
dc.subject | Calcium carbonate | por |
dc.subject | Morphology | por |
dc.subject | Non-ionic surfactants | por |
dc.subject | Size | por |
dc.subject | Wettability | por |
dc.title | Investigation of calcium carbonate precipitated in the presence of alkanols | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
dc.comments | http://www.3bs.uminho.pt/node/18190 | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | 418 | por |
oaire.citationEndPage | 430 | por |
oaire.citationIssue | 6 | por |
oaire.citationTitle | Crystal Research and Technology | por |
oaire.citationVolume | 49 | por |
dc.date.updated | 2014-11-12T10:42:37Z | - |
dc.identifier.doi | 10.1002/crat.201400059 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Crystal Research and Technology | por |
Aparece nas coleções: | 3B’s - Artigos em revistas/Papers in scientific journals |
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18190-Investigation of calcium carbonate precipitated in the presence of alkanols.pdf Acesso restrito! | 2,67 MB | Adobe PDF | Ver/Abrir |