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Issue 6, 2014
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pH-responsive nanofibers with controlled drug release properties

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Smart polymers and nanofibers are potentially intriguing materials for controlled release of bioactive agents. This work describes a new class of pH responsive nanofibers for drug delivery systems with controlled release properties. Initially, poly(4-vinylbenzoic acid-co-(ar-vinylbenzyl)trimethylammonium chloride) [poly(VBA-co-VBTAC)] was synthesized via reversible addition–fragmentation chain transfer (RAFT) polymerization. Then, ciprofloxacin was chosen as the model drug for the release study and encapsulated into pH-responsive polymeric carriers of poly(VBA-co-VBTAC) nanofibers via electrospinning. The morphology of the electrospun nanofibers was examined by scanning electron microscopy (SEM). The structural characteristics of the pH responsive nanofibers were investigated by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The release measurements of ciprofloxacin from pH responsive nanofibers were also performed by high-performance liquid chromatography (HPLC) analysis. To show the pH sensitivity of these nanofibers, the release profile of ciprofloxacin was examined under acidic, neutral and basic conditions. The results indicate that pH responsive nanofibers can serve as effective drug carriers since the release of ciprofloxacin could be controlled by changing the pH of the environment, and therefore these drug loaded pH-responsive nanofibers might have potential applications in the biomedical field.

Graphical abstract: pH-responsive nanofibers with controlled drug release properties

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Article information

13 Sep 2013
29 Nov 2013
First published
02 Dec 2013

Polym. Chem., 2014,5, 2050-2056
Article type

pH-responsive nanofibers with controlled drug release properties

S. Demirci, A. Celebioglu, Z. Aytac and T. Uyar, Polym. Chem., 2014, 5, 2050
DOI: 10.1039/C3PY01276J

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