Surface charge regulated self-assembly and interfacial adhesion mechanisms of cellulose and chitin nanofibers.

Authors

Yu Zhang, Dekun Peng, Xinyue Hu, Jianning Shi, Linda Dari, Jun Wang, Huazhong Ma

Published in

Carbohydrate polymers. Volume 389. Pages 125703. Oct 01, 2026. Epub Jul 27, 2026.

Abstract

This study investigates how charged-group polarity, nanofiber morphology, substrate surface chemistry, and evaporation-assisted assembly jointly regulate the interfacial adhesion of cellulose and chitin nanofibers. Four nanofibers with amino or carboxyl groups were prepared, with charged-group densities of 0.50-1.46 mmol/g. Contact angle and XPS analyses revealed hydroxylated siloxane/silanol-rich glass and native oxide/hydroxide-covered copper surfaces. Statistical lap-shear tests showed substrate-dependent adhesion: DEChN reached 2.57 ± 0.05 MPa and 0.10 ± 0.02 MJ/m³ on glass, whereas TOCN reached 2.13 ± 0.01 MPa and 0.075 ± 0.004 MJ/m³ on copper. Nanofiber concentration, acid/base vapor atmosphere, and drying temperature further regulated strength, toughness, and strain at break by modulating interfacial packing and network cohesion. These results establish a surface-chemistry-guided assembly framework for sustainable water-borne nanofiber adhesives.

PMID:
42586705
Bibliographic data and abstract were imported from PubMed on 13 Aug 2026.

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