Title:
Acetylation of Cellulose Isolated from Brewer´s Spent Grain. Effect of Reaction Time
Author(s):
Jurado-Contreras, S., Camacho Núñez, L., La Rubia, M.D., Navas-Martos, F.J., Rodríguez-Liébana, J.A.
Document(s):
Paper
Poster
Abstract:
Great amounts of brewer´s spent grain (BSG) are generated annually as a byproduct of beer production. As a consequence of its lignocellulosic composition, BSG is a potential candidate to be used in a wide range of applications such as the synthesis of biobased polymers. In this work, the extraction and acetylation of the cellulosic fraction of BSG was explored. The efficiency of the extraction process was monitored by studying the changes in the functional groups and the crystalline structure produced in BSG at each stage of the treatment. Exhaustive removal of hemicelluloses and lignin was demonstrated after treatments. Regarding acetylation of cellulose, the effect of reaction time both on acetylation extent and on thermal properties was studied. Infrared spectra confirmed that a high degree of acetylation was achieved for 1 h reaction time. Acetylation extent reached a maximum after 2 h of reaction. However, the thermal analysis revealed that cellulose acetate exhibited poor thermal stability, which is likely due to the heterogeneous distribution of acetyl groups in the cellulose backbone. Under our experimental setup, 4 h seemed to be enough in order to obtain a cellulose diacetate with excellent thermal stability, which is essential for further processing in bioplastic formulations.
Keywords:
cellulose, residues, chemical composition, bioplastic
Topic:
Biomass Conversion to Bio-Based Products and Chemicals
Subtopic:
Processes for bio-based chemicals and materials
Event:
31st European Biomass Conference and Exhibition
Session:
6BV.2.4
Pages:
1056 - 1058
ISBN:
978-88-89407-23-3
Paper DOI:
10.5071/31stEUBCE2023-6BV.2.4
Price:
FREE
