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Updated: May 6, 2026

Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation

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Published on: June 17, 2014

Interfacial Properties of Surface-Modified Lignin Nanoparticles.

Mina Zare^1,2, Patrícia Figueiredo¹, Maarit H Lahtinen¹

¹Department of Food and Nutrition, Faculty of Agriculture and Forestry, University of Helsinki, 00014 Helsinki, Finland.

Langmuir : the ACS Journal of Surfaces and Colloids

|July 4, 2025

Summary

Surface modification of lignin nanoparticles (LNPs) with hemicellulose impacts their interfacial properties. Hemicellulose adsorption enhances hydrophilicity, while laccase treatment increases hydrophobicity, improving emulsion stability for life science applications.

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Area of Science:

Materials Science
Biochemistry
Colloid and Surface Chemistry

Background:

Surface modification of lignin nanoparticles (LNPs) is crucial for their application in life sciences.
Interfacial properties, governed by adsorbed compounds or grafted ligands, determine LNP functionality.
Understanding these properties is key to unlocking the potential of LNPs in various fields.

Purpose of the Study:

To investigate the interfacial properties of softwood (Lignoboost lignin, LB) and hardwood (Birch lignin, BB) LNPs.
To compare the effects of laccase-induced oxidation, hemicellulose (galactoglucomannan (GGM), glucuronoxylan (GX)) adsorption, and laccase-induced hemicellulose adsorption on LNPs.
To correlate interfacial properties with emulsion stability.

Main Methods:

Characterization of surface-modified LNPs using contact angle and interfacial tension analyses.
Preparation and stability assessment of emulsions formed with modified LNPs.
Comparative analysis of softwood and hardwood LNPs under different surface treatments.

Main Results:

Hemicellulose adsorption generally increased LNP hydrophilicity, with glucuronoxylan (GX) being an exception.
Laccase-induced hemicellulose adsorption significantly increased particle hydrophobicity.
Functionalized Birch lignin LNPs (BB-LNPs) with GX exhibited rapid interfacial adsorption, enhanced hydrophobicity, and improved emulsion stability without aggregation.

Conclusions:

Hemicellulose adsorption and laccase-induced hemicellulose adsorption play distinct roles in tuning LNP interfacial behavior.
Surface modification strategies, particularly using GX, can optimize LNP interfacial stabilization for emulsification.
Findings support the expanded use of surface-modified LNPs in food, pharmaceutical, and biomedical applications.