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Parameters influencing the size of chitosan-TPP nano- and microparticles

Chitosan nanoparticles, produced by ionic gelation, are among the most intensely studied nanosystems for drug delivery. However, a lack of inter-laboratory reproducibility and a poor physicochemical understanding of the process of particle formation have been slowing their potential market applications. To address these shortcomings, the current study presents a systematic analysis of the main polymer factors affecting the nanoparticle formation driven by an initial screening using systematic statistical Design of Experiments (DoE). In summary, we found that for a given chitosan to TPP molar ratio, the average hydrodynamic diameter of the particles formed is strongly dependent on the initial chitosan concentration. The degree of acetylation of the chitosan was found to be the second most important factor involved in the system’s ability to form particles. Interestingly, viscosimetry studies indicated that the particle formation and the average hydrodynamic diameter of the particles formed were highly dependent on the presence or absence of salts in the medium. In conclusion, we found that by controlling two simple factors of the polymer solution, namely its initial concentration and its solvent environment, it is feasible to control in a reproducible manner the production and characteristics of chitosan particles ranging in size from nano- to micrometres.

Titel: Parameters influencing the size of chitosan-TPP nano- and microparticles
Verfasser: Sreekumar, Sruthi
Goycoolea, Francisco Martin
Moerschbacher, Bruno M.
Rivera-Rodriguez, Gustavo R.
Organisation: FB 13: Biologie
Dokumenttyp: Artikel
Medientyp: Text
Erscheinungsdatum: 16.03.2018
Publikation in MIAMI: 31.10.2018
Datum der letzten Änderung: 16.04.2019
Quelle: Scientific Reports 8 (2018) 4695, 1-11
Fachgebiete: Biowissenschaften; Biologie
Lizenz: CC BY 4.0
Sprache: Englisch
Förderung: inanziert durch den Open-Access-Publikationsfonds 2018 der Deutschen Forschungsgemeinschaft (DFG) und der Westfälischen Wilhelms-Universität Münster (WWU Münster).
Format: PDF-Dokument
URN: urn:nbn:de:hbz:6-66199455382
DOI: 10.1038/s41598-018-23064-4