University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal

Logo BOKU Resarch Portal

Chromophore und Cellulosealterung

Project Leader
Rosenau Thomas, Project Leader
Duration:
01.10.2014-30.06.2018
Programme:
BRIDGE 1
Type of Research
Basic Research
Project partners
Lenzing AG, Austria.
Function of the Project Partner: Partner
ÖZEPA, Gumpendorfer Str. 6, 1060 Wien, Austria.
Contact person: Dr. Yvonne Groiss;
Function of the Project Partner: Partner
Sappi Austria Produktions-GmbH & Co. KG, Brucker Straße 21, 8101 Gratkorn, Austria.
Function of the Project Partner: Partner
Zellstoff Pöls Aktiengesellschaft, Dr. Luigi Angeli-Straße 9, 8761 Pöls, Austria.
Function of the Project Partner: Partner
Staff
Potthast Antje, Sub Projectleader
Henniges Ute, Co-worker
Hosoya Takashi, Co-worker
Ahn Kyujin, Co-worker
BOKU Research Units
Division of Chemistry of Renewable Resources
Funded by
Austrian Research Promotion Agency, Sensengasse 1, 1090 Wien, Austria
Abstract
The research project "Chromopres and cellulose aging" addresses the generation of chromophoric substances in cellulosic matrices and its underlying chemical mechanisms, novel opportunities to analyze chromophores and their presurcors on a molecular level, and new ways to minimize yellowing and optimize pulp bleaching sequences.
The six work packages (WP1 - WP6) cover three closely interrelated topics. WP1 to WP3 address the question how process conditions and individual bleaching steps influence the content of carbonyls (precursor moieties for chromophores) in cellulose. This requires appropriate analytical methodology to be optimized and newly developed (chromatographic and spectroscopic techniques). The second group of work packages (WP4 - WP5) deals with metal ion management and the influence of metal ions on product quality (pulp, fibers, paper). The connection between chromophores and impurities, such as metal ions or extractives from the starting material) is studied.
In order to optimize bleaching sequences, the mechanisms and products of the degradation of key chromophores under standardized bleaching conditions are investigated in WP6, building on results of the previous "Chromophore I" project.
Keywords
Organic chemistry; Pulp and paper technology; Renewable resources; Conservation, restoration;
aging; bleaching sequences; cellulose; chromophores; fibers; molar mass distribution; paper; yellowing; cellulosic pulp; pulp bleaching;
© BOKU Wien Imprint