University of Oulu

Sethi, J., Farooq, M., Sain, S. et al. Cellulose (2018) 25: 259.

Water resistant nanopapers prepared by lactic acid modified cellulose nanofibers

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Author: Sethi, Jatin1; Farooq, Muhammad1; Sain, Sunanda1;
Organizations: 1Fibre and Particle Engineering Research Unit, University of Oulu, Oulu, Finland
2Division of Materials Science, Luleå University of Technology, Luleå, Sweden
3Centre for Biocomposites and Biomaterials Processing, University of Toronto, Toronto, Canada
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.1 MB)
Persistent link:
Language: English
Published: Springer Nature, 2018
Publish Date: 2018-11-02


The current work reports a novel, completely water based approach to prepare the water resistant modified cellulose nanopapers. Lactic acid in aqueous medium was attached on cellulose nanofibers surface with the aid of ultra-sonication and later oligomerized (polymerized) by compression molding under high temperature and pressure, to obtain the modified nanopapers with enhanced mechanical properties. The modified nanopapers showed an increase of 32% in the elastic modulus and 30% in the yield strength over reference nanopapers. Additionally, the modified nanopaper was hydrophobic in nature and had superior storage modulus under moist conditions. The storage modulus of wet modified nanopaper was three times (2.4 GPa) compared to the reference nanopapers (0.8 GPa) after 1 h immersion in water. Finally, the thermal stability of the modified nanopaper was also higher than reference nanopaper. The material reported is 100% bio-based.

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Series: Cellulose
ISSN: 0969-0239
ISSN-E: 1572-882X
ISSN-L: 0969-0239
Volume: 25
Issue: 1
Pages: 259 - 268
DOI: 10.1007/s10570-017-1540-2
Type of Publication: A1 Journal article – refereed
Field of Science: 221 Nanotechnology
Funding: The authors acknowledge the financial support of the TEKES FiDiPro Program.
Copyright information: This is the peer reviewed version of the following article: Sethi, J., Farooq, M., Sain, S. et al. Cellulose (2018) 25: 259., which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.