Dissolution Capacity of Novel Cellulose Solvents Based on Triethyloctylammonium Chloride

Autor(es)

Achtel, Christian ^[1] ; Jedvert, Kerstin ^{[1, 2]} ; Kosan, Birgit ^[3] ; El Seoud, Omar A. ^[4] ; Heinze, Thomas ^[1]

Afiliação do(s) autor(es)

^[1] Friedrich Schiller Univ Jena, Inst Organ Chem & Macromol Chem, Ctr Excellence Polysaccharide Res, Humboldtstr 10, D-07743 Jena - Germany

^[2] Swerea IVF, Biobased Fibres, POB 104, SE-43122 Molndal - Sweden

^[3] Thuringian Inst Text & Plast Res TITK, Breitscheidstr 97, D-07407 Rudolstadt - Germany

^[4] Univ Sao Paulo, Inst Chem, Prof Lineu Prestes Av 748, BR-05508000 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MACROMOLECULAR CHEMISTRY AND PHYSICS; v. 218, n. 21 NOV 2017.
• Citações Web of Science: 6

Resumo

Dissolution of cellulose from various sources (microcrystalline cellulose and different dissolving grade pulp fibers) is investigated in solvent systems based on triethyl(n-octyl)ammonium chloride (N2228Cl). Clear cellulose solutions are obtained with N2228Cl in a variety of solvents, e.g., dimethyl sulfoxide, N,N-dimethylacetamide, and acetone. It is possible to prepare clear cellulose solutions from pulp fibers with concentrations up to 15 wt%. However, it is found that the cellulose is degraded, especially when neat (i.e., molten) N2228Cl is used as a solvent. The present work includes comprehensive rheological characterization of the cellulose solutions, both with shear and extensional rheology. In most cases, the viscosity values are low (complex viscosities below 100 Pa s for 5-10 wt% dissolved cellulose), and the solutions show more Newtonian than viscoelastic behavior. (AU)

• Processo FAPESP: 14/22136-4 - Uso de solventes verdes e suas misturas na otimização de processos químicos
• Beneficiário: Omar Abou El Seoud
• Modalidade de apoio: Auxílio à Pesquisa - Temático