Spinning cellulose hollow fibers using 1-ethyl-3-methylimidazolium acetate-dimethylsulfoxide co-solvent

Linfeng Lei, Arne Lindbråthen, Marius Sandru, Maria Teresa Guzman Gutierrez, Xiangping Zhang, Magne Hillestad, Xuezhong He*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The mixture of the ionic liquid 1-ethyl-3-methylimidazolium acetate (EmimAc) and dimethylsulfoxide (DMSO) was employed to dissolve microcrystalline cellulose (MCC). A 10 wt % cellulose dope solution was prepared for spinning cellulose hollow fibers (CHFs) under a mild temperature of 50 °C by a dry-wet spinning method. The defect-free CHFs were obtained with an average diameter and thickness of 270 and 38 μm, respectively. Both the XRD and FTIR characterization confirmed that a crystalline structure transition from cellulose I (MCC) to cellulose II (regenerated CHFs) occurred during the cellulose dissolution in ionic liquids and spinning processes. The thermogravimetric analysis (TGA) indicated that regenerated CHFs presented a similar pyrolysis behavior with deacetylated cellulose acetate during pyrolysis process. This study provided a suitable way to directly fabricate hollow fiber carbon membranes using cellulose hollow fiber precursors spun from cellulose/(EmimAc + DMSO)/H2O ternary system.

Original languageEnglish
Article number972
JournalPolymers
Volume10
Issue number9
DOIs
StatePublished - 1 Sep 2018

Keywords

  • Cellulose
  • Hollow fiber
  • Ionic liquids
  • Spinning
  • Viscosity

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