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Spray drying as a method of producing silk sericin powders

Genc G., Narin G., Bayraktar O.

Archives of Materials Science

2008

Vol. 29, nr 1-2

16-28

Aqueous sericin solutions were used as raw material for the production of dry powders using a lab-scale spray dryer. A linear regression analysis of agglomeration was employed, in addition to experimental designs at two levels with three factors for the analysis of three responses: moisture content, particle type and agglomeration degree. The process factors were the drying air temperature (120 degree C and 160 degree C), the feed rate (1.25 × 10 to -7 and 2.5 × 10 to -7 m3/s), and the concentration of sericin solutions of 10% and 30% (w/w) fed to the spray dryer. The three responses were analyzed statistically to determine the effective parameters and it was concluded that moisture content depended on three factors--drying air temperature being the dominant parameter. Particle size and shape depended mainly on feed rate and agglomeration depended on the moisture content of the product.