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Polymers 2017, 9(7), 286; https://doi.org/10.3390/polym9070286

Effect of Drug Loading Method and Drug Physicochemical Properties on the Material and Drug Release Properties of Poly (Ethylene Oxide) Hydrogels for Transdermal Delivery

School of Pharmacy and Pharmaceutical Sciences, Faculty of Health Sciences and Wellbeing,University of Sunderland, Science Complex, Wharncliffe Street, Sunderland SR1 3SD, UK
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Received: 8 June 2017 / Revised: 10 July 2017 / Accepted: 13 July 2017 / Published: 19 July 2017
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Abstract

Novel poly (ethylene oxide) (PEO) hydrogel films were synthesized via UV cross-linking with pentaerythritol tetra-acrylate (PETRA) as cross-linking agent. The purpose of this work was to develop a novel hydrogel film suitable for passive transdermal drug delivery via skin application. Hydrogels were loaded with model drugs (lidocaine hydrochloride (LID), diclofenac sodium (DIC) and ibuprofen (IBU)) via post-loading and in situ loading methods. The effect of loading method and drug physicochemical properties on the material and drug release properties of medicated film samples were characterized using scanning electron microscopy (SEM), swelling studies, differential scanning calorimetry (DSC), fourier transform infrared spectroscopy (FT-IR), tensile testing, rheometry, and drug release studies. In situ loaded films showed better drug entrapment within the hydrogel network and also better polymer crystallinity. High drug release was observed from all studied formulations. In situ loaded LID had a plasticizing effect on PEO hydrogel, and films showed excellent mechanical properties and prolonged drug release. The drug release mechanism for the majority of medicated PEO hydrogel formulations was determined as both drug diffusion and polymer chain relaxation, which is highly desirable for controlled release formulations. View Full-Text
Keywords: poly (ethylene oxide); pentaerythritol tetra-acrylate; hydrogel; lidocaine hydrochloride; diclofenac sodium; ibuprofen poly (ethylene oxide); pentaerythritol tetra-acrylate; hydrogel; lidocaine hydrochloride; diclofenac sodium; ibuprofen
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wong, R.S.H.; Dodou, K. Effect of Drug Loading Method and Drug Physicochemical Properties on the Material and Drug Release Properties of Poly (Ethylene Oxide) Hydrogels for Transdermal Delivery. Polymers 2017, 9, 286.

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