To main content

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

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.
Read the publication

Category

Academic article

Language

English

Author(s)

Affiliation

  • SINTEF Industry / Biotechnology and Nanomedicine
  • Norwegian University of Science and Technology
  • Chinese Academy of Sciences

Date

01.09.2018

Year

2018

Published in

Polymers

Volume

10:972

Issue

9

Page(s)

1 - 11

View this publication at Norwegian Research Information Repository