Jp. Stegemann et Mv. Sefton, VIDEO ANALYSIS OF SUBMERGED JET MICROENCAPSULATION USING HEMA-MMA, Canadian journal of chemical engineering, 74(4), 1996, pp. 518-525
Video and digital image analysis were used to understand the limiting
steps in a submerged jet microencapsulation process for mammalian cell
s. Hydroxyethylmethacrylate-methylmethacryl copolymer (HEMA-MMA) two p
hase droplets with an aqueous core are formed by coextrusion at a need
le tip and fall through a layer of hexadecane prior to precipitation i
n an aqueous medium. Initial eccentricity was lowest when the capsule
cores contained 20% (w/v) Ficoll and the inner needle protruded 100 mu
m past the outer needle. Capsule morphology was refined in the hexade
cane overlayer, and was strongly affected by crossing the hexadecane-p
recipitation bath interface.