Preparation of inorganic/organic polymer hybrid microcapsules with high encapsulation efficiency by an electrospray technique

A Yunoki, E Tsuchiya, Y Fukui, A Fujii… - ACS Applied Materials …, 2014 - ACS Publications
A Yunoki, E Tsuchiya, Y Fukui, A Fujii, T Maruyama
ACS Applied Materials & Interfaces, 2014ACS Publications
Microcapsules composed of calcium phosphate and chitosan were prepared in a single step
by electrospraying. An aqueous solution containing calcium chloride and chitosan was
electrosprayed into a phosphate solution to form a calcium phosphate shell on the sprayed
droplets. The resulting microcapsules were 350 μm in average diameter. Investigation using
fluorescently labeled chitosan and XRD measurements revealed that the shells of the
microcapsules were composed of calcium phosphate (mainly hydroxyapatite) and chitosan …
Microcapsules composed of calcium phosphate and chitosan were prepared in a single step by electrospraying. An aqueous solution containing calcium chloride and chitosan was electrosprayed into a phosphate solution to form a calcium phosphate shell on the sprayed droplets. The resulting microcapsules were 350 μm in average diameter. Investigation using fluorescently labeled chitosan and XRD measurements revealed that the shells of the microcapsules were composed of calcium phosphate (mainly hydroxyapatite) and chitosan. Instead of chitosan, poly(diallyldimethylammonium chloride) and polyethylene glycol were also available for microcapsule production by electrospraying. Variations in the electrospraying conditions resulted in a variety of microcapsule shapes. Various types of substrates were successfully encapsulated in microcapsules with a high encapsulation efficiency (more than 80%). Finally, we succeeded in the encapsulation of living yeast cells in microcapsules, and observed their growth within these microcapsules.
ACS Publications
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