Effect of Surfactants on Stability of Colloidal Sols as Precursors in Sol-Gel Encapsulation

Ioana Lacatusu; Nicoleta Maria Badea; Aurelia Meghea

doi:10.4028/www.scientific.net/KEM.415.57

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Effect of Surfactants on Stability of Colloidal Sols as Precursors in Sol-Gel Encapsulation
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 415Effect of Surfactants on Stability of Colloidal...

Effect of Surfactants on Stability of Colloidal Sols as Precursors in Sol-Gel Encapsulation

Abstract:

This paper aims to study the effect of three alkyl quaternary salts on stability of colloidal sols further used as water-insoluble oligomers for encapsulation of an active flavonoid compound – quercitin. The preparation procedure is described and practical remarks on silica-based sol-gels are included. It is also demonstrated how to exploit the sol-gel preparation route in order to improve the thermal resistance of quercitin and to increase an optical function - fluorescence. The evolution in time of competitive hydrolysis and condensation processes has been observed by dynamic light scattering measurements. The sol-gel materials with entrapped quercitin molecule have been characterised by spectral methods (FT-IR, UV-VIS-NIR), fluorescence and by thermal analysis as well. Sol-gel materials doped with active flavonoid compound may be used in preparation of some functional materials with bioactive properties.

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Periodical:

Key Engineering Materials (Volume 415)

Pages:

57-60

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.415.57

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Online since:

September 2009

Authors:

Ioana Lacatusu, Nicoleta Maria Badea, Aurelia Meghea

Keywords:

Quaternary Ammonium Salt, Quercitin, Sol-Gel Encapsulation

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References

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