University of Oulu

Fiorentini, C., Bassani, A., Duserm Garrido, G., Merino, D., Perotto, G., Athanassiou, A., Peräntie, J., Halonen, N., & Spigno, G. (2022). High-pressure autohydrolysis process of wheat straw for cellulose recovery and subsequent use in PBAT composites preparation. Biocatalysis and Agricultural Biotechnology, 39, 102282.

High-pressure autohydrolysis process of wheat straw for cellulose recovery and subsequent use in PBAT composites preparation

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Author: Fiorentini, C.1; Bassani, A.1; Duserm Garrido, G.1;
Organizations: 1Department for Sustainable Food Process (DiSTAS), Università Cattolica del Sacro Cuore, Via Emilia Parmense, 84, Piacenza, 29122, Italy
2Smart Materials, Istituto Italiano di Tecnologia, Via Morego, 30, Genova, 16163, Italy
3Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, P.O. Box 4500, FI-90014, University of Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.7 MB)
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Language: English
Published: Elsevier, 2022
Publish Date: 2023-01-16


The effect of autohydrolysis (AH) temperature (165 °C, 195 °C, 225 °C) on the structure, purity, and recovery yield of the cellulose residue isolated after additional alkaline and bleaching steps from wheat straw, was investigated. The processes were quantified for mass yields in the different steps and for antioxidants and sugars release during AH.

AH at 195 °C allowed for the highest cellulose residue yield (83.5%) with purity (∼70%) and structure similar to the other residues. FTIR and XRD analyses showed straw cellulose (SC) with a type II polymorphism and crystallinity index increasing with AH temperature. SC obtained at the end of the entire fractionation process (SC-195 °C) starting from AH residue-195 °C was tested as a reinforcing agent in different percentage (0, 2 and 5% by weight) in poly(butylene adipate-co-terephthalate) (PBAT) films. The Young’s modulus of the films increased by ∼17% with 5 wt% cellulose, while tensile strength and elongation at break decreased.

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Series: Biocatalysis and agricultural biotechnology
ISSN: 1878-8181
ISSN-E: 1878-8181
ISSN-L: 1878-8181
Volume: 39
Article number: 102282
DOI: 10.1016/j.bcab.2022.102282
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
220 Industrial biotechnology
Funding: Bio-Based Industries Joint Undertaking under the European Union’s Horizon 2020 Research and Innovation programme (NewPack project - grant agreement No 792261) and Doctoral School on the Agro-Food System, Universitá Cattolica del Sacro Cuore financially supported this research.
EU Grant Number: (792261) NEWPACK - Development of new Competitive and Sustainable Bio-Based Plastics
Copyright information: © 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license