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Theophylline‐loaded pectin‐based hydrogels. I. Effect of medium p H and preparation conditions on drug release profile
Author(s) -
Güner Ozde Zeynep,
Cam Cansu,
ArabaciogluKocaaga Banu,
Batirel Saime,
Güner F. Seniha
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46731
Subject(s) - swelling , self healing hydrogels , differential scanning calorimetry , oxygen permeability , materials science , contact angle , chemical engineering , pectin , fourier transform infrared spectroscopy , scanning electron microscope , controlled release , wound healing , nuclear chemistry , chemistry , polymer chemistry , composite material , nanotechnology , oxygen , organic chemistry , biochemistry , engineering , physics , biology , immunology , thermodynamics
In this study, a series of theophylline‐loaded calcium pectin gel films were prepared in three different Ca +2 concentrations with three different methods for wound dressing applications. Drug release performance of the films were investigated in four different medium pH in order to mimic wound healing pH conditions. Hydrogel films were characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, scanning electron microscopy and atomic force microscopy. Their absorbency (fluid handling), swelling behavior, dehydration rate, dispersion characteristic, dressing pH determination, water vapor permeability, oxygen permeability, surface contact angle, flexibility, Shore A hardness, mean mass per unit area and thickness were determined. The effect of the hydrogels on wound healing was evaluated with an in vitro wound healing assay. After evaluating all data, we suggested that the hydrogel film prepared with swelling method using 7% or 10% crosslinker and dried at 26 °C is more suitable for controlled drug release process. We showed that between pH 3.25 and 7.12 the form of the hydrogel did not change, and drug release was continuous. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46731.