Investigation of calcium carbonate precipitated in the presence of alkanols

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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 degrees) 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.

keywords

IONIC LIQUID; GROWTH; CRYSTALLIZATION; MORPHOLOGY; ALCOHOL; ETHANOL; WATER; NANOPARTICLES; ARAGONITE; VATERITE

subject category

Crystallography

authors

Fernandes, M; Paz, FAA; Mano, JF; Bermudez, VD

our authors

foto Filipe Alexandre Almeida Paz

Filipe Alexandre Almeida Paz

Principal Researcher

Groups

G1 - Porous Materials and Nanosystems

Projects

Bio-inspired deposition of a biomineral on biopolymers and on biopolymer/siloxane hybrids for biomedical applications (PTDC/CTM-BPC/112774/2009)

Centre for Research in Ceramics and Composite Materials - CICECO (LA0011: 2013-2014) (PEst-C/CTM/LA0011/2013)

Rational design of hybrid organic-inorganic interfaces: the next step towards advanced functional materials (HINT)

acknowledgements

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

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Publication Details

type
Journal Article
year
2014
journal
CRYSTAL RESEARCH AND TECHNOLOGY
volume
49
publisher
WILEY-V C H VERLAG GMBH
issn
0232-1300
issue
6
digital object identifier
10.1002/crat.201400059
web of science article identifier
WOS:000337627400010

Journal Metrics (JCR 2019)

Journal Impact Factor
1.169
Journal Impact Factor (5 yrs)
1.195
category normalized journal percentile
32.692

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