TY - JOUR
T1 - Temperature stable liquid core hydrocolloid capsules
AU - Nussinovitch, A.
AU - Gershon, Z.
AU - Nussinovitch, M.
PY - 1997
Y1 - 1997
N2 - Liquid core spherical alginate-chitosan capsules, encompassing different hydrocolloid concentrations within their membrane, were produced in a single step. This simplified process is advantageous over other multi-stage methods of fluid core capsule production. The contents of the capsule was composed either of distilled water or sucrose solutions of 2, 5 and 30% (w/w), although other viscous liquids can be used. The beads with 0, 2 and 5% sucrose were produced by diffusion of sucrose out of those liquid core capsules containing 30% sucrose. The spherical shape of the capsule was maintained after diffusion. Mechanical properties of various capsules were studied after incubation at 25, 37, 45, 55 and 85°C for 5, 30 and 60 min respectively, while those of the liquid core water capsules were studied for a further 2 weeks at 25°C. Capsules with a higher hydrocolloid concentration within their membrane displayed more stress at failure (strength) and less brittleness than those with lesser solid membrane content. Following diffusion, capsules with 2 and 5% sucrose were weak compared to those with 30% sucrose; however, no membrane breakage was observed after incubation. The weakest capsules were those with water content incubated for longer times at higher temperatures. The manuscript presents the temperature-stability relationship of liquid core capsules. Projections of three-dimensional curves of mechanical property versus time, temperature or percentage sugar, offer a convenient way to examine the desired mechanical properties and their dependence on liquid core composition and incubation conditions.
AB - Liquid core spherical alginate-chitosan capsules, encompassing different hydrocolloid concentrations within their membrane, were produced in a single step. This simplified process is advantageous over other multi-stage methods of fluid core capsule production. The contents of the capsule was composed either of distilled water or sucrose solutions of 2, 5 and 30% (w/w), although other viscous liquids can be used. The beads with 0, 2 and 5% sucrose were produced by diffusion of sucrose out of those liquid core capsules containing 30% sucrose. The spherical shape of the capsule was maintained after diffusion. Mechanical properties of various capsules were studied after incubation at 25, 37, 45, 55 and 85°C for 5, 30 and 60 min respectively, while those of the liquid core water capsules were studied for a further 2 weeks at 25°C. Capsules with a higher hydrocolloid concentration within their membrane displayed more stress at failure (strength) and less brittleness than those with lesser solid membrane content. Following diffusion, capsules with 2 and 5% sucrose were weak compared to those with 30% sucrose; however, no membrane breakage was observed after incubation. The weakest capsules were those with water content incubated for longer times at higher temperatures. The manuscript presents the temperature-stability relationship of liquid core capsules. Projections of three-dimensional curves of mechanical property versus time, temperature or percentage sugar, offer a convenient way to examine the desired mechanical properties and their dependence on liquid core composition and incubation conditions.
UR - http://www.scopus.com/inward/record.url?scp=21744447296&partnerID=8YFLogxK
U2 - 10.1016/S0268-005X(97)80027-6
DO - 10.1016/S0268-005X(97)80027-6
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AN - SCOPUS:21744447296
SN - 0268-005X
VL - 11
SP - 209
EP - 215
JO - Food Hydrocolloids
JF - Food Hydrocolloids
IS - 2
ER -