Effect of dimethylsulfoxide on the viscoelastic properties and sol–gel transition of cellulose/ionic liquid solutions

Abstract

ARTICLE This journal isViscoelastic properties of cellulose solutions with 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) and dimthylsulfoxide (DMSO) as solvents were studied by rheological experiments. From the results of rheological behaviors, the non-monotonous decrease of viscosity with DMSO content was observed. When the content of DMSO in [BMIM]Cl/DMSO is lower than 5 wt% in [BMIM]Cl/DMSO, the viscosity and gelation temperature (T gel ) decreased with the increase of DMSO. However, the values of viscosity and T gel showed nonlinear change with the further increase of DMSO. It could be understood that DMSO acted as the diluent when the content of DMSO is below 5 wt%. The local micro-aggregation or micro-phase separation of cellulose could be happened when the content of DMSO further increased due to the weak action between cellulose and DMSO.B Headings should always be subordinate to A headingse.g. Synthetic procedures, Materialsand methods, Crystallography. C headings should always be subordinate to B headings e.g. General procedure for synthesis of compound X. The main paragraph text follows directly on here.

Organic electrolyte solutions as versatile media for the dissolution and regeneration of cellulose

“…For example, Xu and co-workers explored the influence of DMSO concentration on the electrospinning properties of cellulose (from cotton linters, DP = 1600) dissolved in [C 1 vC 2 C 1 im]Cl. 12 DMSO reduced the viscosity, 114,[132][133][134] surface tension and entanglement density, thereby contributing toward a continuous electrospinning jet. The authors identified that a sufficient cellulose loading was necessary to ensure effective entanglement.…”

“…11). 133 The non-linearity was attributed to microscopic aggregation or phase separation in this region. Although in one instance a higher viscosity was observed for an OES-cellulose mixture ([C 2 C 1 im][OAc]/DMSO 90 : 10 wt/wt) than the equivalent neat IL-cellulose solution, 104 the general trend of decreasing viscosity upon addition of the molecular co-solvent still holds.…”

Influence of Aprotic Cosolvents on the Thermophysical Properties of Imidazolium-Based Ionic Liquid

“…The literature is rich in the study of cosolvents (e.g., DMSO) with ILs, [C n mim]­[Cl], for bioenergy; − however, little attention has been given to quantitatively study the effects of cosolvents on the thermophysical properties of ILs that are of importance, and necessary for the biochemical process design.…”