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A more sustainable synthesis approach for cellulose acetate using the DBU/CO$_{2}$ switchable solvent system

Wolfs, Jonas 1,2; Meier, Michael A. R. 1,2
1 Materialwissenschaftliches Zentrum für Energiesysteme (MZE), Karlsruher Institut für Technologie (KIT)
2 Institut für Organische Chemie (IOC), Karlsruher Institut für Technologie (KIT)

Abstract:
Cellulose acetate is one of the most important cellulose derivatives and commercially mainly produced using the Acetic Acid Process, in which overstoichiometric amounts of acetic anhydride and concentrated acetic acid are used to obtain cellulose triacetate. A subsequent partial hydrolysis is necessary to achieve evenly substituted cellulose acetates with lower degrees of substitution. Homogeneous acetylations in ionic liquids or other cellulose dissolving solvent systems often offer milder conditions and the possibility of a one-step synthesis of cellulose acetates with lower degrees of substitution by simply adjusting the equivalents of the acetylation agent. Here, we show an efficient homogeneous cellulose acetylation process without the need of any additional catalyst or activation step using the DBU/CO$_{2}$ switchable solvent system. Vinyl acetate was used as a more benign acetylation agent under mild conditions and straightforward recyclability of all employed components was demonstrated with high recycling ratios (87.0–98.9%). Less cellulose backbone degradation compared to a cellulose acetate sample synthesized by the Acetic Acid Process from the same cellulose source was shown by size exclusion chromatography (M$_{n}$ = 35 kDa vs. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000135464
Veröffentlicht am 19.07.2021
Originalveröffentlichung
DOI: 10.1039/d1gc01508g
Scopus
Zitationen: 8
Web of Science
Zitationen: 7
Dimensions
Zitationen: 9
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Anorganische Chemie (AOC)
Institut für Biologische und Chemische Systeme (IBCS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1463-9262, 1463-9270
KITopen-ID: 1000135464
HGF-Programm 43.33.11 (POF IV, LK 01) Adaptive and Bioinstructive Materials Systems
Erschienen in Green chemistry
Verlag Royal Society of Chemistry (RSC)
Band 23
Heft 12
Seiten 4410–4420
Nachgewiesen in Dimensions
Scopus
Web of Science
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