Sustainable Strategies in the Synthesis of Lignin Nanoparticles for the Release of Active Compounds: A Comparison. Issue 17 (11th August 2020)

• Record Type: Journal Article
• Authors: Cailotto, Simone; Gigli, Matteo; Bonini, Massimo; Rigoni, Federica; Crestini, Claudia
• Is Part Of: ChemSusChem. Volume 13:Issue 17(2020)
• Page Start: 4759
• Page End: 4767
• Publication Date: 2020-08-11
• Subjects: controlled release -- lignin nanoparticles -- nanotechnology -- self-assembly -- sustainability; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202001140
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: The preparation of nanoparticles represents a powerful tool for lignin valorization, as it combines easy methodologies with high application potential. Different synthetic strategies and various lignin sources have been employed in the process. However, the great variability in the lignin structure prevents a direct comparison of the so far reported lignin nanoparticles (LNPs), especially as regards their physicochemical and functional properties. To this purpose, two green protocols, that is, solvent‐antisolvent and hydrotropic, were optimized and used to generate LNPs from the same softwood kraft lignin. The nanomaterials were fully characterized to extrapolate structure/property relationships and reveal any differences in the mechanism of self‐assembly. Furthermore, tests on methylene blue entrapment capacity and release behavior at two different pH values (2.0 and 7.4) evidenced a clear dependence on the LNPs characteristics and thus on the strategy adopted for their production. Abstract : Capture and release : The technique adopted for the preparation of lignin nanoparticles influences their physicochemical properties, such as particle size and pH stability. These, in turn, govern the entrapment capacity of actives and their release kinetics in different environments.