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Polymers
Special Issues
Lignocellulosic Polymers: Fractionation and Characterization
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Lignocellulosic Polymers: Fractionation and Characterization

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Biomacromolecules, Biobased and Biodegradable Polymers".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 2456

Special Issue Editors

Dr. Gabriel Paes

E-Mail Website
Guest Editor
FARE Laboratory, INRAE/University of Reims Champagne-Ardenne, 51100 Reims, France
Interests: biorefinery; lignocellulosic biomass; polymers; recalcitrance; enzyme; accessibility; interaction; microscopy; fluorescence; 4D; modeling
Special Issues, Collections and Topics in MDPI journals
Prof. Aurore Richel

E-Mail Website
Guest Editor
Laboratory of Biomass and Green Technologies, University of Liege, Liege, Belgium
Interests: lignin; lignocellulosic biomass; biofuels; biopolymers; biomass chemistry; thermochemical conversion; molecular approaches
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Lignocellulosic biomass is a key sustainable feedstock to produce materials, chemicals, and fuels replacing fossil carbon resources in order to mitigate global warming. Given lignocellulose chemical and structural complexity, its viable transformation in biorefineries is still not economically optimal. Gaining more insights into the fractionation of lignocellulose is important to enhance polymer valorization, together with their characterization to propose innovative applications.

Expected contributions will be articles presenting chemical, physical, and biological techniques to fractionate lignocellulose and combinations of these techniques, with a particular interest in novel or innovative approaches. Upscalable processes to reach industrial viability will also be appreciated. In addition, characterization techniques providing in-depth information on polymer structure and chemical composition are welcome. Fast and cheap approaches having the potential to be used for high throughput screening or as sensors are also right in the scope of this Special Issue.

Dr. Gabriel Paes
Prof. Aurore Richel
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Lignocellulose
  • polymer
  • cellulose
  • hemicellulose
  • lignin
  • characterization

Published Papers (1 paper)

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Research

15 pages, 3114 KiB  
Article
The Dual Effect of Ionic Liquid Pretreatment on the Eucalyptus Kraft Pulp during Oxygen Delignification Process
by Letian Qi, Jinke Liu, Jianmin Peng, Guihua Yang, Fengfeng Li, Yu Xue and Jiachuan Chen
Polymers 2021, 13(10), 1600; https://doi.org/10.3390/polym13101600 - 15 May 2021
Cited by 4 | Viewed by 1848
Abstract
Oxygen delignification presents high efficiency but causes damage to cellulose, therefore leading to an undesired loss in pulp strength. The effect of ionic liquid pretreatment of [BMIM][HSO4] and [TEA][HSO4] on oxygen delignification of the eucalyptus kraft pulp was investigated [...] Read more.
Oxygen delignification presents high efficiency but causes damage to cellulose, therefore leading to an undesired loss in pulp strength. The effect of ionic liquid pretreatment of [BMIM][HSO4] and [TEA][HSO4] on oxygen delignification of the eucalyptus kraft pulp was investigated at 10% IL loading and 10% pulp consistency, after which composition analysis, pulp and fiber characterizations, and the mechanism of lignin degradation were carried out. A possible dual effect of enhancing delignification and protecting fibers from oxidation damage occurred simultaneously. The proposed [TEA][HSO4] pretreatment facilitated lignin removal in oxygen delignification and provided fibers with improved DP, fiber length and width, and curl index, resulting in the enhanced physical strength of pulp. Particularly, its folding endurance improved by 110%. An unusual brightness reduction was identified, followed by detailed characterization on the pulps and extracted lignin with FTIR, UV, XPS, and HSQC. It was proposed that [TEA][HSO4] catalyzed the cleavage of β-O-4 bonds in lignin during the oxygen delignification, with the formation of Hibbert’s ketones and quinonoid compounds. The decomposed lignin dissolved and migrated to the fiber surface, where they facilitated the access of the oxidation agent and protected the fiber framework from oxidation damage. Therefore, it was concluded that ionic liquid pretreatment has a dual effect on oxygen delignification. Full article
(This article belongs to the Special Issue Lignocellulosic Polymers: Fractionation and Characterization)
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