ฐิติพันธ์ เกียรติยงชัย. Coaxial Electrospinning of Cellulose Acetate Hollow-Fibrous Films Carrying Amoxicillin and Their In Vitro Release Characteristics. Master's Degree(Food Engineering). King Mongkut's University of Technology Thonburi. KMUTT Library.. : King Mongkut's University of Technology Thonburi, 2009.
Coaxial Electrospinning of Cellulose Acetate Hollow-Fibrous Films Carrying Amoxicillin and Their In Vitro Release Characteristics
Abstract:
In this work, a coaxial electrospinning apparatus was developed to fabricate cellulose
acetate (CA)-gelatin (GL) blend hollow fibers containing a model active compound,
namely, amoxicillin, in the fiber kernel. CA was used because it provides good
resistivity to gastric fluid digestion with sustained release property, whilst GL helps
accelerate and manipulate the release rate of the encapsulated core compound. The
component of the coaxial electro spun fibers was characterized by Fourier transform
infrared (FTIR) spectroscopy as well as X-ray diffraction (XRD) analysis. Surface and
interior morphological structure of the fibers were investigated through scanning
electron microscopy (SEM) and transmission electron microscopy (TEM), respectively.
The core content of the electrospun fibers was measured using high performance liquid
chromatography (HPLC). Release characteristics were investigated in simulated
gastric fluid (SGF) at pH 1.2 with the presence of pepsin at 37 C. Both FTIR and
XRD results indicated the presence of shell and core components in the obtained fibers.
TEM micrographs showed that core-shell coaxial structure of the electro spun fiber was
successfully fabricated; the average diameter of the fibers as indicated by SEM images
was 913?180 nm. Results from HPLC revealed that the core content of the coaxial
fiber was about 37 wt%. Study on the release kinetics of amoxicillin from the coaxial
fiber revealed a near Fickian release mechanism with a release rate constant of
0.04 min-1 (R2 ~O.99). Furthermore, the release rate was found to be influenced by
erosion and swelling of the fibers. The fibers exposed to SGF for 24 h were still intact
without bursting effect. These core-shell ultrafine fibers are expected to find potential
applications in controlled release ofbioactive compounds in gastrointestinal (GI) tract.