Physical Properties and Stability of Soft Gelled Chitosan-Based Nanoparticles

Goycoolea F., Brunel F., Gueddari N., Coggiola A., Lollo G., Moerschbacher B., Remuñán-López C., Delair T., Domard A., Alonso M.

Research article (journal) | Peer reviewed

Abstract

We addressed the role of the degree of acetylation (DA) and of Mw of chitosan (CS) on the physical characteristics and stability of soft nanoparticles obtained through either ionic cross-linking with sodium tripolyphosphate (TPP), or reverse emulsion/gelation. Each of these methods affords nanoparticles (NPs) or nanogels (NGs), respectively. The size of CS–TPP NPs comprising CS of high Mw (≈123–266 kDa) increases with DA (≈1.6%–56%), while it do not change for CS of low Mw (≈11–13 kDa); the zeta potential (ζ) decreases with DA regardless of Mw (ζ ≈+34.6 ± 2.6 to ≈+25.2 + 0.6 mV) and the NPs appear as spheres in transmission electron microscopy. Stability in various cell culture media (pH 7.4 at 37 °C) is greater for NPs made with CS of DA ≥ 27%. In turn, NGs exhibit larger sizes (520 ± 32 to 682 ± 27 nm) than do CS–TPP NPs, and can only be formed with CS of DA < 30%. The average diameter size for these NGs shows a monotonic increase with CS's Mw. The physical properties and stability of these systems in biological media depend mostly on the DA of CS and its influence on the balance between hydrophilic/hydrophobic interactions. (Figure presented.).

Details about the publication

JournalMacromolecular Bioscience
Volume16
Issue12
Page range1873-1882
StatusPublished
Release year2016
Language in which the publication is writtenEnglish
DOI10.1002/mabi.201600298
Link to the full texthttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84997610803∨igin=inward
Keywordschitosan; ionotropic gelation; nanogels; nanoparticles; reverse emulsion

Authors from the University of Münster

El Gueddari, Nour-Eddine
Molecular Phytopathology and Renewable Resources - Group Prof. Bruno Moerschbacher
Goycoolea, Francisco M.
Professorship for NANOBiotechnology (Prof. Goycoolea)
Moerschbacher, Bruno
Molecular Phytopathology and Renewable Resources - Group Prof. Bruno Moerschbacher