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Updated: May 19, 2026

Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications
Published on: February 7, 2021
Nanocarriers for dermal drug delivery: influence of preparation method, carrier type and rheological properties
Julia C Schwarz1, Angelika Weixelbaum, Elisabeth Pagitsch
1University of Vienna, Research Platform Characterisation of Drug Delivery Systems on Skin and Investigation of Involved Mechanisms, Althanstrasse 14, 1090 Vienna, Austria.
Abstract:
Nanocarriers are highly interesting delivery systems for the dermal application of drugs. Based on a eudermic alkylpolyglycosid nanoemulsions, solid lipid nanoparticles (SLN) and nano-structured lipid carriers (NLC) were prepared by ultrasonic dispersion. The ultrasound preparation technique turned out to be convenient and rapid. For reasons of comparison, nanoemulsions were also prepared by high-pressure homogenisation with highly similar physicochemical properties. Cryo electron microscopy was employed to elucidate the microstructure of the ultrasound-engineered nanocarriers. Furthermore, in vitro skin experiments showed excellent skin permeation and penetration properties for flufenamic acid from all formulations. Moreover, ATR-FTIR studies revealed barrier-restorative properties for NLC and SLN. Furthermore, the rheological characteristics of all nanocarriers were determined. In order to increase the viscosity, three different polymers were employed to also prepare semi-solid NLC drug delivery systems. All of them exhibited comparable skin diffusion properties, but may offer improved dermal applicability.
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