The paper reports experimental results collected for testing a drying process model for acoustically levitated droplets. More specifically, the so-called D2 versus time law is tested on droplets of homologous disaccharide aqueous solutions. For assessing the validity of the model, the determination of the droplet diameter is performed by a direct video camera monitoring and by an OH/CH area ratio analysis of InfraRed spectra collected as a function of time. For such a test, aqueous solutions of trehalose and sucrose, which show different surface tension values, are investigated. The experimental findings, obtained by the two independent employed approaches, reveal, for both the samples, a good agreement with the theoretic model previsions for the initial time trend. Furthermore, in agreement with literature data, they furnish a value of the surface tension, which is higher for trehalose in respect to sucrose.

Testing of drying process model for acoustically levitated disaccharide aqueous solutions

Cannuli A.
Primo
;
Caccamo M. T.
Ultimo
2019

Abstract

The paper reports experimental results collected for testing a drying process model for acoustically levitated droplets. More specifically, the so-called D2 versus time law is tested on droplets of homologous disaccharide aqueous solutions. For assessing the validity of the model, the determination of the droplet diameter is performed by a direct video camera monitoring and by an OH/CH area ratio analysis of InfraRed spectra collected as a function of time. For such a test, aqueous solutions of trehalose and sucrose, which show different surface tension values, are investigated. The experimental findings, obtained by the two independent employed approaches, reveal, for both the samples, a good agreement with the theoretic model previsions for the initial time trend. Furthermore, in agreement with literature data, they furnish a value of the surface tension, which is higher for trehalose in respect to sucrose.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11570/3164036
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