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Poly(methyl methacrylate)‐grafted chitosan microspheres for controlled release of ampicillin
Author(s) -
Changerath Radhakumary,
Nair Prabha D.,
Mathew Suresh,
Nair C. P. Reghunadhan
Publication year - 2009
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.31188
Subject(s) - chitosan , microsphere , drug delivery , materials science , scanning electron microscope , nuclear chemistry , methyl methacrylate , chemistry , chemical engineering , nanotechnology , copolymer , composite material , polymer , organic chemistry , engineering
Microspheres of 50–500 μm diameter were prepared from a blend of chitosan and chitosan‐ g ‐PMMA. Environmental scanning electron microscopic and SEM studies revealed that the microspheres are porous and the pores extend toward the inner core of the microspheres. The microspheres were also found to be hemocompatible and cytocompatible. A model drug ampicillin was used to evaluate the drug loading capacity and the controlled release properties of the microspheres. The system maintained a sustained release of ampicillin for a period of more than 8 days. The drug‐loaded chitosan/chitosan‐ g ‐PMMA microspheres exhibited higher antibacterial activity for both the gram positive (ATCC 25923 S. aureus ) and gram negative (ATCC 25922 E. coli ) bacteria than the drug‐loaded virgin chitosan microspheres. The percentage release and bioactivity of ampicillin was found to be higher for the chitosan/chitosan‐ g ‐PMMA microspheres than the virgin chitosan microspheres. Potential applications such as oral drug delivery, wound dressings, tissue engineering, and so forth, are envisaged from these microspheres. © 2008 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2009