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ARTICLE

Isolation and Characterization of Cellulose Nanofiber (CNF) from Kenaf (Hibiscus cannabinus) Bast through the Chemo-Mechanical Process

Rudi Dungani1,*, Mohammad Irfan Bakshi2, Tsabita Zahra Hanifa1, Mustika Dewi1, Firda A. Syamani2, Melbi Mahardika2, Widya Fatriasari2,*
1 School of Life Sciences and Technology, Institut Teknologi Bandung, Bandung, 40132, Indonesia
2 Research Center for Biomass and Bioproducts, National Research and Innovation Agency (BRIN), Cibinong, 16911, Indonesia
* Corresponding Author: Rudi Dungani. Email: email; Widya Fatriasari. Email: email
(This article belongs to the Special Issue: Special Issue in Celebration of JRM 10 Years)

Journal of Renewable Materials https://doi.org/10.32604/jrm.2024.049342

Received 03 January 2024; Accepted 07 March 2024; Published online 07 May 2024

Abstract

The present work emphasizes the isolation of cellulose nanofiber (CNF) from the kenaf (Hibiscus cannabinus) bast through a chemo-mechanical process. In order to develop high CNF yield with superior properties of CNF for improving compatibility in varied applications this method is proposed. The fiber purification involved pulping and bleaching treatments, whereas mechanical treatment was performed by grinding and high-pressure treatments. The kraft pulping as a delignification method followed by bleaching has successfully removed almost 99% lignin in the fiber with high pulp yield and delignification selectivity. The morphology of the fibers was characterized by scanning electron microscopy, which showed a smooth surface, fiber bundles, gel-shaped nanofiber, and an average size of 94.05 nm with 69% of CNF in 34–100 nm size. The chemo-mechanical process exhibited a more crystalline nature in CNF than pulp kenaf. The low zeta potential values exhibit the distribution of fibrils and colloidal suspension stability without any further agglomeration. A lower concentration of CNF is less stable exhibiting the product agglomeration. Therefore, the chemo-mechanical process for the isolation of CNF (Hibiscus cannabinus) from kenaf involves sustainable, low-cost, non-toxic, and cheap alternatives than other traditional methods.

Graphical Abstract

Isolation and Characterization of Cellulose Nanofiber (CNF) from Kenaf <i>(Hibiscus cannabinus)</i> Bast through the Chemo-Mechanical Process

Keywords

Kenaf bast fiber; kraft delignification and bleaching; ultrafine grinder; chemo-mechanical properties; CNF

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