Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 12, Issue 8, Pages 2178-2180Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b204599k
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Mineral-polysaccharide microcapsules are produced by a one-step method in which the deposition of a semipermeable alginate/chitosan membrane around droplets of sodium alginate is coupled with in situ precipitation of amorphous calcium phosphate. Nucleation of calcium phosphate occurs within the membrane by counter-diffusion of Ca2+ and HPO42- ions and can be controlled by the phosphate concentration in the alginate droplets to produce hybrid microcapsules with enhanced mechanical strength and reduced permeability to encapsulated molecules such as haemoglobin and ibuprofen.
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