Naslov
Fluid-bed microencapsulation of ascorbic acid

Autori
Knežević, Zdravka ; Gosak, Darko ; Hraste, Marin ; Jalšenjak, Ivan

Izvornik
Journal of microencapsulation (0265-2048) 15 (1998), 2; 237-252

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ascorbic acid; fluid-bed; microencapsulation; hydrophobic coating; aquafeeds

Sažetak
Ascorbic acid has been fluidized and microencapsulated with three different hydrophobic coating materials by the top-spray method. The experiments were conducted with polymethacrylate coating material formulated as a water dispersion, and ethyl-cellulose and waxy coating material both formulated as organicsolutions. Characteristics of the fluidized bed procedure in conical geometry have been determined by estimation of two parameters: bed porosity and total pressure drop. A satisfactory agreement between experimental and calculated values hasbeen reached. The following properties of the microencapsulated ascorbic acid have been determined: core content, bulk and tapped density, crystal size distribution prior and after microencapsulation, surface morphology and release profile.The comparison and evaluation of different hydrophobic coating materials, have been performed on the basis of these findings.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika, Kemijsko inženjerstvo

POVEZANOST RADA