Structural and molecular-weight-dependency in the formation of lignin nanoparticles from fractionated soft- and hardwood lignins

Ievgen V Pylypchuk,Mikael E Lindström,Anastasia Riazanova,Olena Sevastyanova

doi:10.1039/d0gc04058d

Ievgen V Pylypchuk, Mikael E Lindström + Show 2 more

Open Access

https://doi.org/10.1039/d0gc04058d

Copy DOI

Abstract

The diagram showing how the size, shape, and dispersity of the LNPs is depending on the structural properties of initial lignin and how they can be tailored by changing lignin concentration and by applying lignins with different molecular weights.

Highlights

Lignin is a natural aromatic polymer which is attracting attention due to its abundance and unique polymeric properties.[1,2,3] Kraft lignin, obtained as a cheap byproduct of the paper pulpSpecial attention is being devoted to lignin nanoparticles, which are environmentally benign[14] and have been tested for loading in biomedicines,[15] as Pickering emulsions,[16] and for virus agglomeration,[17] etc
The lignin fractions (EL5 and SL5) that were not soluble in any of the solvents contained the lowest number of phenolic hydroxyls (Ph-OH) units, and these fractions had the highest content of carbohydrate impurities, usually as lignin-carbohydrate complexes (LCC).[24]
Comparison of the lignin nanoparticles (LNPs) produced using the same protocol from the lignin of two different origins, allowed us to link the structural differences in lignin with the size, shape, and morphology of the LNPs

Summary

Introduction

Lignin is a natural aromatic polymer which is attracting attention due to its abundance and unique polymeric properties.[1,2,3] Kraft lignin, obtained as a cheap byproduct of the paper pulp. Special attention is being devoted to lignin nanoparticles, which are environmentally benign[14] and have been tested for loading in biomedicines,[15] as Pickering emulsions,[16] and for virus agglomeration,[17] etc. The main applications of lignin nanoparticles have been thoroughly reviewed by Sipponen and Österberg.[15,18]. LNPs have been prepared utilizing their self-assembly properties.[19] In general, the structure depends on the source of the lignin, the selection of the solvent, and the type of noncovalent interactions, etc. LNPs grow by controlled nucleationgrowth mechanism,[20] where the lignin molecules with a high

Objectives

Methods

Results

Conclusion