University of Oulu

Yuan, Y., Hong, S., Lian, H., Zhang, K., & Liimatainen, H. (2020). Comparison of acidic deep eutectic solvents in production of chitin nanocrystals. Carbohydrate Polymers, 236, 116095.

Comparison of acidic deep eutectic solvents in production of chitin nanocrystals

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Author: Yuan, Yang1; Hong, Shu1,2; Lian, Hailan1;
Organizations: 1College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
2Fibre and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.9 MB)
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Language: English
Published: Elsevier, 2020
Publish Date: 2022-02-10


Five different acidic deep eutectic solvents (DESs) composed of choline chloride and organic acids were applied to fabricate chitin nanocrystals (ChNCs). All DESs resulted in high transmittance and stable ChNCs suspensions with very high mass yield ranging from 78 % to 87.5 % under proper reaction conditions. The acidic DESs had a dual role in ChNCs fabrication, i.e. they promoted hydrolysis of chitin and acted as an acylation reagent. Physicochemical characterization of chitin revealed that the removal of amorphous area during DES treatments led to increased crystallinity of ChNCs and a dimension diversity correlated the DES used. The average diameter and length of individual ChNCs ranged from 42 nm to 49 nm and from 257 nm to 670 nm, respectively. The thermal stability of ChNCs was comparable to that of pristine chitin. Thus, acidic DESs showed to be non-toxic and environmentally benign solvents for production of functionalized chitin nanocrystals.

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Series: Carbohydrate polymers
ISSN: 0144-8617
ISSN-E: 1879-1344
ISSN-L: 0144-8617
Volume: 236
Article number: 116095
DOI: 10.1016/j.carbpol.2020.116095
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: This research was supported by grants from the National Natural Science Foundation of China (31370567), the Doctorate Fellowship Foundation of Nanjing Forestry University, the National First-class Disciplines, the Priority Academic Program Development of Jiangsu Higher Education Institutions, and the Academy of Finland project “Bionanochemicals” (No. 298295).
Academy of Finland Grant Number: 298295
Detailed Information: 298295 (Academy of Finland Funding decision)
Copyright information: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http:/