Customer publications

On the dissolution state of cellulose in aqueous tetrabutylammonium hydroxide solutions

Behrens, M. A.; Holdaway, J. A.; Nosrati, P.; Olsson, U.

By 12 March 2019No Comments

RSC Advances, 2016, vol 6, 36, pp. 30199-30204



We have characterized the dissolution state of microcrystalline cellulose (MCC) in aqueous 40 wt% tetrabutylammonium hydroxide (TBAH) using a combination of light and small angle X-ray scattering, up to 0.1 g cm−3. In dilute solutions, cellulose–cellulose interactions are repulsive, as seen by a positive second virial coefficient. Above 0.04 g cm−3, interactions shift from repulsive to be effectively attractive and cellulose begin to form aggregates that can be modelled as mass fractal clusters. The small angle X-ray scattering data also indicate that cellulose is preferentially solvated by TBA+ ions. We propose that the apparent shift in effective interactions is due to a phase transition where less soluble cellulose II precipitates while cellulose I still dissolves.

Visit the full article

Back to the overview