Scattering studies of the size and structure of cellulose dissolved in aqueous hydroxide base solvents
Journal article, 2021

Combining NaOH with other hydroxide bases with superior dissolution properties can be a means of improving dissolution of cellulose. However, this raises questions about how the size and structure of cellulose vary when dissolved in different hydroxide bases. Here, cellulose in aqueous solutions of NaOH, Tetramethylammonium hydroxide (TMAH), Benzyltrimethylammonium hydroxide (Triton B) and previously studied equimolar solutions of NaOH/TMAH and NaOH/Triton B were investigated using small angle X-ray scattering, static and dynamic light scattering. The results show that cellulose in NaOH(aq) is largely aggregated and that the more hydrophobic TMAH and Triton are capable of molecularly dissolving cellulose into worm-like conformations, stiffer than in NaOH. The dissolution properties of mixtures are highly dependent on the compatibility of the individual bases; in line with previous observations of the properties of the solutions which now could be correlated to the structure of the cellulose on a nano- and microscale.

DLS

Dissolution

SAXS

SLS

Hydroxide

Cellulose

Author

Beatrice Swensson

Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Forest Products and Chemical Engineering

Sebastian Lages

Chalmers, Physics, Materials Physics

Barbara Berke

Chalmers, Physics, Materials Physics

Anette Larsson

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

Merima Hasani

Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Forest Products and Chemical Engineering

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 274 118634

Subject Categories

Polymer Chemistry

Physical Chemistry

Other Chemistry Topics

DOI

10.1016/j.carbpol.2021.118634

More information

Latest update

9/16/2021