Dissolution of cellulose using a combination of hydroxide bases in aqueous solution
Artikel i vetenskaplig tidskrift, 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

Författare

Beatrice Swensson

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Anette Larsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Anette Larsson Group

Wallenberg Wood Science Center (WWSC)

Merima Hasani

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Wallenberg Wood Science Center (WWSC)

Cellulose

0969-0239 (ISSN)

Vol. in Press

Ämneskategorier

Pappers-, massa- och fiberteknik

DOI

10.1007/s10570-019-02780-8

Mer information

Senast uppdaterat

2019-11-25