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 applicati...

Authors: Sreekumar, Sruthi
Goycoolea, Francisco Martin
Moerschbacher, Bruno
Rivera-Rodriguez, Gustavo R.
Division/Institute:FB 13: Biologie
Document types:Article
Media types:Text
Publication date:2018
Date of publication on miami:31.10.2018
Modification date:31.07.2020
Edition statement:[Electronic ed.]
Source:Scientific Reports 8 (2018) 4695, 1-11
DDC Subject:570: Biowissenschaften; Biologie
License:CC BY 4.0
Language:English
Funding:inanziert durch den Open-Access-Publikationsfonds 2018 der Deutschen Forschungsgemeinschaft (DFG) und der Westfälischen Wilhelms-Universität Münster (WWU Münster).
Format:PDF document
URN:urn:nbn:de:hbz:6-66199455382
Permalink:http://nbn-resolving.de/urn:nbn:de:hbz:6-66199455382
Other Identifiers:DOI: 10.1038/s41598-018-23064-4
Digital documents:artikel_moerschbacher_2018.pdf
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520 3 |a <p>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.</p> 
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