Dissolution of cellulose using a combination of hydroxide bases in aqueous solution
Journal article, 2019

In order to further understand the role of the cation when dissolving cellulose in aqueous solutions of hydroxide bases, different bases were combined in solution. Up to 5 wt.% of microcrystalline cellulose was dissolved using a combination of NaOH and the organic base tetramethylammonium hydroxide (TMAH) in water at low temperatures. Thermoscans of solutions containing both NaOH(aq) and TMAH(aq) indicated that cellulose interaction with TMAH seems to be favoured over NaOH. Dynamic rheology measurements of the solutions revealed that combining the two bases delayed gelation significantly when compared to cellulose dissolved in NaOH(aq) or TMAH(aq) alone. Intrinsic viscosity of cellulose in the combined NaOH- and TMAH(aq) solutions was slightly higher than that of the single-base solutions, indicating a slight increase in solvent quality. This shows that combining bases may lead to synergies that improve solvent stability without requiring the use of other additives. Graphic abstract: [Figure not available: see fulltext.],

Solvent

Aqueous

NaOH

Dissolution

Cellulose

TMAH

Author

Beatrice Swensson

Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Chemical Reaction Engineering

Anette Larsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Anette Larsson Group

Wallenberg Wood Science Center (WWSC)

Merima Hasani

Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Chemical Reaction Engineering

Wallenberg Wood Science Center (WWSC)

Cellulose

0969-0239 (ISSN)

Vol. in Press

Subject Categories

Paper, Pulp and Fiber Technology

DOI

10.1007/s10570-019-02780-8

More information

Latest update

11/25/2019