First International Conference on MOLDAVIAN RISKS – FROM ...

<strong>First</strong> <strong>International</strong> <strong>Conference</strong> on MOLDAVIAN RISKS - FROM GLOBAL TO LOCAL SCALE
16-19 May 2012, Bacau, Romania
SYNERGISTIC EFFECT FOR THE RETENTION OF METAL
CATIONS OBTAINED BY A COMPLEX ORGANIC -
INORGANIC COMPOUND OF DIFFERENT TYPES OF CLAY
Ileana Denisa Nistor, Gheorghe Surpateanu, Neculai Doru Miron, Anca
Ciobanu, Iuliana Mihaela Lazar
1 ”Vasile Alecsandri” University of Bacau, Department of Chemical and Food Engineering
Corresponding author: Ileana Denisa Nistor, denisanistor@yahoo.com
Abstract: Hybrid materials cover a wide range of compounds with diverse potential
applications. Indeed, these materials have the advantage of combining the properties of the
organic component with the inorganic component leading us to expect a synergy between
these two properties.
The inorganic component of the material is formed by cationic or anionic clays:
montmorillonite or layerd double hydroxides and the organic component of hybrid material
is represented by organic compounds like: chitosan, dendrimers, and pharmaceutical
substances. The first part of this works presents a complex organic - inorganic compound
of montmorillonite and organic substances intercalated like chitosan and poliol dendrimers.
When used simultaneously chitosan and montmorillonite, there is a strong synergy
phenomenon, probably due to interactions between the main properties. We can have a
first conclusion: the hybrid materials can develop interesting synergistic properties and the
field of hybrid materials deserves all the attention possible in future. There are a major
concerns and attempts to capture carbon dioxide emissions released in the majority
industrial and other types of activities. We propose in this work to solve this problem using
hybrid material. The research opens up new prospects for the class of hybrid materials like
organic - inorganic, with an enhanced carbon dioxide retention capacity. Another material
type polyol dendrimers-montmorillonite has a high retention capacity for carbon dioxide
and it can also be regenerated by heating low. The second part presents the hybrid
materials formed by layerd double hydroxides with cloramphenicol and salicylate in the
interlayer space. These materials were analyzed by thermogravimetric analysis, X-ray
diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), powerful
nondestructive. The kinetic parameters (reaction order n) the apparent activation energy
(Ea) and pre-exponential factor were calculated using the Coats - Redfern. We also
determined the effects of compensation. The prospects of my research are to deepen my
research on anionic clays and design new drugs to treat inflammatory bowel disease
(Crohn's Disease and Ulcerative Colitis) and more particularly associated colitis and
diarrhea.
Key words: anionic and cationic clays, dendrimers, chitosan, cloramphenicol, salicylate.
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