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Immediate release of helicid from nanoparticles produced by modified coaxial electrospraying

Yu, D-G; Zheng, X-L; Yang, Y; Li, X-Y; Williams, GR; Zhao, M; (2019) Immediate release of helicid from nanoparticles produced by modified coaxial electrospraying. Applied Surface Science , 473 pp. 148-155. 10.1016/j.apsusc.2018.12.147. Green open access

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Abstract

In this paper, a modified coaxial electrospraying process was explored for the generation of novel nanoscale composite materials. A solution comprising 5% (w/v) of the model drug helicid and 10% (w/v) polyvinylpyrrolidone (PVP) K10 in a mixture of N,N-dimethylacetamide and ethanol (4:6, v:v) was employed as the shell working liquid. This could not be processed into a solid product when processed by single-fluid electrospraying. However, when undertaking co-axial electrospraying with a core shellac solution (40% w/v in ethanol) solid particles were obtained. An extremely thin nanocoating layer of drug-polymer composite with an estimated thickness of 7 nm was deposited on a shellac core. X-ray diffraction and infrared spectroscopy demonstrated that the drug was converted into an amorphous nanocomposite with the PVP in the shell layer, losing its original crystalline state. In vitro dissolution tests revealed that all the helicid loading could be released within one minute, suggesting the particles have potential applications to deliver very rapid therapeutic effects. Mechanisms are proposed underlying the formation and functional performance of the materials.

Type: Article
Title: Immediate release of helicid from nanoparticles produced by modified coaxial electrospraying
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.apsusc.2018.12.147
Publisher version: https://doi.org/10.1016/j.apsusc.2018.12.147
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Functional nanocoating, Modified coaxial electrospraying, Immediate release, Core-shell structures, Poorly water-soluble drug
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > UCL School of Pharmacy
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > UCL School of Pharmacy > Pharmaceutics
URI: https://discovery.ucl.ac.uk/id/eprint/10064411
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