A simple method for extraction of cellulose nanocrystals from green Luffa cylindrica biomaterial and their characteristics
Issued Date
2023-02-01
Resource Type
ISSN
09598103
eISSN
10970126
DOI
Scopus ID
2-s2.0-85140455325
Journal Title
Polymer International
Volume
72
Issue
2
Start Page
243
End Page
251
Rights Holder(s)
SCOPUS
Bibliographic Citation
Polymer International Vol.72 No.2 (2023) , 243-251
Suggested Citation
Jantachum P., Phinyocheep P. A simple method for extraction of cellulose nanocrystals from green Luffa cylindrica biomaterial and their characteristics. Polymer International Vol.72 No.2 (2023) , 243-251. 251. doi:10.1002/pi.6463 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/81752
Title
A simple method for extraction of cellulose nanocrystals from green Luffa cylindrica biomaterial and their characteristics
Author(s)
Author's Affiliation
Other Contributor(s)
Abstract
The utilization of cellulose nanocrystals (CNCs) extracted from natural fibers is one way to make the most use of renewable resources. Isolation of CNCs normally requires a multi-step process that includes an alkali treatment, bleaching (using sodium chlorite) and acid hydrolysis (sulfuric or hydrochloric acid). Here, a new approach for extracting CNCs from green Luffa cylindrica biomaterial, one type of natural fiber found in tropical countries, was developed via an alkali treatment and oxidative degradation using sodium hypochlorite, without an acid hydrolysis step. The diameter and length of the obtained CNCs were about 7.5 ± 2.2 nm and 266.9 ± 25.2 nm, respectively, with a considerably higher percentage yield (40%) compared to the traditional hydrolyzed-cellulose nanocrystals (H-CNCs) (28%). The zeta potential of CNCs and H-CNCs in neutral water was −29.2 ± 0.5 mV and −13.1 ± 0.5 mV, respectively. Negative charges on CNC surfaces play an important role in the reduced aggregation of CNC suspensions. The degrees of crystallinity of CNCs (78.5%) and H-CNCs (79.2%) are comparable. Moreover, the degrees of polymerization of CNCs and H-CNCs were 297.21 and 226.64, respectively. The method developed is considered an easy operation with low pollution, low-cost chemicals and a time- and energy-saving process. © 2022 Society of Industrial Chemistry.