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Studies on the pH‐dependent swelling properties and morphologies of chitosan/calcium‐alginate complexed beads
Author(s) -
Lee OkSub,
Ha ByungJo,
Park SooNam,
Lee YoonSik
Publication year - 1997
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1997.021980925
Subject(s) - swelling , chitosan , calcium alginate , calcium , coacervate , chemistry , sodium alginate , aqueous solution , bead , nuclear chemistry , polymer chemistry , chemical engineering , morphology (biology) , sodium , materials science , chromatography , organic chemistry , composite material , genetics , biology , engineering
Chitosan/calcium‐alginate beads were prepared by a coacervation method in aqueous medium. Their swelling properties and morphologies were studied. Complexed beads with a mean diameter of 500 μm were obtained by dropwise addition of a sodium alginate solution into a chitosan‐calcium chloride solution. From scanning electron microscopic studies, we observed that chitosan modifies the morphology of calcium‐alginate beads. The swelling properties of chitosan/calcium‐alginate beads are different from those of calcium‐alginate beads. In the case of the calcium‐alginate beads, the swelling volume increases as the pH of the medium increases. However, chitosan/calcium‐alginate beads show a maximum swelling volume at pH 9.0.