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Published in: Cellulose 4/2023

11-01-2023 | Original Research

Acidic deep eutectic solvent treatment for viscosity control and reactivity enhancement of bamboo dissolving pulp

Authors: Chao Duan, Xiaomeng Feng, Chaochao Tian, Guodong Tian, Shuangxi Nie

Published in: Cellulose | Issue 4/2023

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Abstract

This work demonstrated a green process using deep eutectic solvent (DES) treatment for properties improvements of bamboo dissolving pulp. Results showed that an acidic DES, namely choline chloride-oxalic acid, was the most effective compared to other acidic, alkaline and neutral DESs. Upon the optimum acidic DES treatment (pulp to DES ratio 1:10, 60 °C and 30 min), the pulp viscosity was reduced from 715 mL/g of original pulp to 466 mL/g, while the pulp reactivity increased from 43.0 to 88.1%. The positive results were mainly ascribed to a synergy during the DES treatment: (1) a large number of activated protons (H+) from the acidic DES depolymerized the cellulose chain and destroyed the fiber structure; (2) the vigorous hydrogen bonding competitions between fibers and DES (Ch+ and Cl) facilitated the fiber swelling and reaction efficiency, thus increasing fiber accessibility/reactivity. DES also featured a high recyclability/reusability after serval reuses. Therefore, this work offers a sustainable and effective alternative for production of premium bamboo dissolving pulp.

Graphical abstract

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Appendix
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Literature
go back to reference Tian C (2013) Improvement in the Fock test for determining the reactivity of dissolving pulp. Tappi J 12:21–26CrossRef Tian C (2013) Improvement in the Fock test for determining the reactivity of dissolving pulp. Tappi J 12:21–26CrossRef
go back to reference Yang Z (2019) Natural deep eutectic solvents and their applications in biotechnology. In: Itoh T, Koo Y-M (eds) Application of ionic liquids in biotechnology. Springer, Cham, pp 31–59 Yang Z (2019) Natural deep eutectic solvents and their applications in biotechnology. In: Itoh T, Koo Y-M (eds) Application of ionic liquids in biotechnology. Springer, Cham, pp 31–59
Metadata
Title
Acidic deep eutectic solvent treatment for viscosity control and reactivity enhancement of bamboo dissolving pulp
Authors
Chao Duan
Xiaomeng Feng
Chaochao Tian
Guodong Tian
Shuangxi Nie
Publication date
11-01-2023
Publisher
Springer Netherlands
Published in
Cellulose / Issue 4/2023
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-023-05043-9

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