Thermal Characterization of Agar Encapsulated in TiO2 Sol–Gel View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2004-09

AUTHORS

T. López, M. Picquart, G. Aguirre, G. Arriola, Y. Freile, D. H. Aguilar, P. Quintana, J. J. Alvarado-Gil, F. M. Vargas-Luna

ABSTRACT

Thermal effusivity evolution as a function of time, of aqueous emulsions of agar encapsulated in a TiO2 matrix synthesized by the sol–gel method, was monitored during dehydration at ambient conditions. Measurements of thermal effusivity were performed by the photoacoustic technique using a conventional cell. The results show sigmoidal growth as a function of time during the dehydration process. The data analysis shows two dehydration stages; in the first one, samples prepared at pH 7.5 show a lower dehydration time than samples prepared at pH 7. But, when the dehydration process continues, it is slowed down in the sample prepared at pH 7.5. FT-IR absorption and Raman spectroscopy are used to verify the strong interaction between the TiO2 matrix and the agar. More... »

PAGES

1483-1493

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Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10765-004-5753-x

DOI

http://dx.doi.org/10.1007/s10765-004-5753-x

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https://app.dimensions.ai/details/publication/pub.1002845144


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