Issue 39, 2024

Ozonolysis of regular and crosslinked lignin nanoparticles: closing the loop

Abstract

Crosslinked lignin nanoparticles have been developed to produce chemically robust grades suitable for demanding applications. However, their end-of-life degradation has remained elusive. In this work, we studied oxidative degradation of regular, non-covalently assembled LNPs and crosslinked hydroxymethylated LNPs (HLNPs). The results suggest that HLNPs degrade in the same fashion as regular LNPs through the transformation of aromatic rings into muconic acid moieties. This transformation was studied by UV-vis, 31P-NMR, 2D-NMR and FTIR and it was found to be rapid within the first 120 min of ozonolysis. During ozonolysis, the LNPs degrade into smaller nanoparticles, as shown by SEM and DLS, until their ultimate degradation and conversion into acetals and small organic acids, supported by LC-MS data.

Graphical abstract: Ozonolysis of regular and crosslinked lignin nanoparticles: closing the loop

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Article information

Article type
Paper
Submitted
02 Jul 2024
Accepted
05 Aug 2024
First published
22 Aug 2024
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2024,12, 26772-26779

Ozonolysis of regular and crosslinked lignin nanoparticles: closing the loop

A. E. Alexakis and M. H. Sipponen, J. Mater. Chem. A, 2024, 12, 26772 DOI: 10.1039/D4TA04564E

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