Delignification and Densification as a Route to Enable the Use of Wheat Straw for Structural Materials
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in: ACS Sustainable Chemistry and Engineering, Jahrgang 11.2023, Nr. 19, 04.05.2023, S. 7596-7604.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Delignification and Densification as a Route to Enable the Use of Wheat Straw for Structural Materials
AU - Neudecker, Felix
AU - Jakob, Matthias
AU - Bodner, Sabine
AU - Keckes, Jozef
AU - Buerstmayr, Hermann
AU - Gindl-Altmutter, Wolfgang
N1 - Publisher Copyright: © 2023 The Authors. Published by American Chemical Society.
PY - 2023/5/4
Y1 - 2023/5/4
N2 - Cereal straw is an abundant byproduct of crop production. Despite little current use in materials, the biologicallyoptimized structure, which carries the weight of a structure up to 1.5 m high and protects it against environmental impacts, showsconsiderable potential. In order to be able to use this renewable material for structural purposes, barriers such as small dimensionsand a low density have to be overcome. In the present study, lignin was partially removed from wheat straw using an alkaline solutionwith the aim of increasing the relative cellulose content and improving malleability. Thereafter, a homogeneous, dense, and multi-layered material was produced by densification at elevated temperatures. Outstanding improvements in mechanical performancewere obtained compared to the untreated raw material. For the optimum variant, tensile strength increased by a factor of three(average strength 218 MPa) and elastic modulus increased by a factor of four (average 13 GPa), which is within the range ofestablished wood-based structural materials. We propose that mild alkaline treatment as carried out in the present study maysignificantly facilitate the development of high-value structural materials based on little utilized cereal straw.
AB - Cereal straw is an abundant byproduct of crop production. Despite little current use in materials, the biologicallyoptimized structure, which carries the weight of a structure up to 1.5 m high and protects it against environmental impacts, showsconsiderable potential. In order to be able to use this renewable material for structural purposes, barriers such as small dimensionsand a low density have to be overcome. In the present study, lignin was partially removed from wheat straw using an alkaline solutionwith the aim of increasing the relative cellulose content and improving malleability. Thereafter, a homogeneous, dense, and multi-layered material was produced by densification at elevated temperatures. Outstanding improvements in mechanical performancewere obtained compared to the untreated raw material. For the optimum variant, tensile strength increased by a factor of three(average strength 218 MPa) and elastic modulus increased by a factor of four (average 13 GPa), which is within the range ofestablished wood-based structural materials. We propose that mild alkaline treatment as carried out in the present study maysignificantly facilitate the development of high-value structural materials based on little utilized cereal straw.
KW - agricultural by-products
KW - alkaline treatment
KW - delignification
KW - densification
KW - tensile strength
KW - wheat straw
UR - http://www.scopus.com/inward/record.url?scp=85159564684&partnerID=8YFLogxK
U2 - 10.1021/acssuschemeng.3c01375
DO - 10.1021/acssuschemeng.3c01375
M3 - Article
AN - SCOPUS:85159564684
VL - 11.2023
SP - 7596
EP - 7604
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
SN - 2168-0485
IS - 19
ER -