University of Oulu

Sethi, J., Liimatainen, H., & Sirviö, J. A. (2021). Fast and Filtration-Free Method to Prepare Lactic Acid-Modified Cellulose Nanopaper. ACS Omega, 6(29), 19038–19044.

Fast and filtration-free method to prepare lactic acid-modified cellulose nanopaper

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Author: Sethi, Jatin1,2; Liimatainen, Henrikki1; Sirviö, Juho Antti1
Organizations: 1Fibre and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
2Fibre Technology Division, KTH Royal Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.7 MB)
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Language: English
Published: American Chemical Society, 2021
Publish Date: 2021-08-17


Dewatering in the preparation of cellulose nanopapers can take up to a few hours, which is a notable bottleneck in the commercialization of nanopapers. As a solution, we report a filtration-free method that is capable of preparing lactic acid-modified cellulose nanopapers within a few minutes. The bleached cellulose nanofibers (CNFs), obtained using a Masuko grinder, were functionalized by sonication-assisted lactic acid modification and centrifuged at 14 000 rpm to achieve a doughlike, concentrated mass. The concentrated CNFs were rolled into a wet sheet and dried in a vacuum drier to obtain nanopapers. The nanopaper preparation time was 10 min, which is significantly faster than the earlier time period reported in the literature (up to a few hours of preparation time). The mechanical properties of nanopaper were comparable to the previous values reported for nanopapers. In addition, the method was successfully used to prepare highly conductive functional nanopapers containing carboxylated multiwalled carbon nanotubes.

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Series: ACS omega
ISSN: 2470-1343
ISSN-E: 2470-1343
ISSN-L: 2470-1343
Volume: 6
Pages: 19038 - 19044
DOI: 10.1021/acsomega.1c02328
Type of Publication: A1 Journal article – refereed
Field of Science: 221 Nanotechnology
Funding: This study is funded by a personal grant of the Finnish Cultural Foundation, particularly Ulla-Riitta Magnien-Laurilan fund.
Copyright information: © 2021 The Authors. Published by American Chemical Society. CC BY.