A Statistical Approach to Optimize the Spray Drying of Starch Particles: Application to Dry Powder Coating |
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Authors: | Luca Bilancetti Denis Poncelet Catherine Loisel Stefania Mazzitelli Claudio Nastruzzi |
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Institution: | (1) ENITIAA, UMR CNRS GEPEA 6144, route de la Geraudiere, BP 82225, 44322 Nantes Cedex 3, France;(2) Department of Chemistry and Technology of Drugs, University of Perugia, via del Liceo 1, 06123 Perugia, Italy; |
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Abstract: | This article describes the preparation of starch particles, by spray drying, for possible application to a dry powder coating
process. Dry powder coating consists of spraying a fine powder and a plasticizer on particles. The efficiency of the coating
is linked to the powder morphological and dimensional characteristics. Different experimental parameters of the spray-drying
process were analyzed, including type of solvent, starch concentration, rate of polymer feeding, pressure of the atomizing
air, drying air flow, and temperature of drying air. An optimization and screening of the experimental parameters by a design
of the experiment (DOE) approach have been done. Finally, the produced spray-dried starch particles were conveniently tested
in a dry coating process, in comparison to the commercial initial starch. The obtained results, in terms of coating efficiency,
demonstrated that the spray-dried particles led to a sharp increase of coating efficiency value. |
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