Processing Chitosan for Preparing Chitosan-Functionalized Nanoparticles by Polyelectrolyte Adsorption

Chitosan-coated nanoparticles are a promising class of drug delivery vehicles that have been studied as tools for improving the gastrointestinal delivery of therapeutics. Here we present an analysis of chitosan-coated nanoparticles with an emphasis on characterizing the chitosan polymer properties....

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Bibliographic Details
Published in:Langmuir 2021-07, Vol.37 (28), p.8517-8524
Main Authors: Wilson, Brian K, Prud’homme, Robert K
Format: Article
Language:English
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Summary:Chitosan-coated nanoparticles are a promising class of drug delivery vehicles that have been studied as tools for improving the gastrointestinal delivery of therapeutics. Here we present an analysis of chitosan-coated nanoparticles with an emphasis on characterizing the chitosan polymer properties. Cationic nanoparticles are produced by adsorbing a layer of chitosan HCl on an anionic (−40 mV ζ-potential) polyacrylic acid (PAA) coated primary nanoparticle. Commercially available chitosan (90% deacetylated) must be processed into a nearly completely deacetylated HCl salt form (99% deacetylation); otherwise, primary nanoparticle aggregation occurs. Deacetylated chitosan HCl produces stable, cationic (+35 mV ζ-potential) nanoparticles within 10% of the original anionic particle hydrodynamic diameter at a 1:2 molar ratio of chitosan glucosamine HCl monomers to PAA acrylic acid monomers.
ISSN:0743-7463
1520-5827
DOI:10.1021/acs.langmuir.1c00990