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Direct electrospinning of cellulose in the DBU-CO₂ switchable solvent system

Title data

Heidari, Mina ; Onwukamike, Kelechukwu N. ; Grau, Etienne ; Grelier, Stéphane ; Cramail, Henri ; Meier, Michael A. R. ; Greiner, Andreas:
Direct electrospinning of cellulose in the DBU-CO₂ switchable solvent system.
In: Cellulose. Vol. 28 (2021) Issue 11 . - pp. 6869-6880.
ISSN 1572-882X
DOI: https://doi.org/10.1007/s10570-021-03967-8

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
SFB 840 - Von partikulären Nanosystemen zur MesotechnologieB8

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

We report the use of the DBU-CO2 switchable solvent system for the direct electrospinning of cellulose. Two cellulose types were investigated, i.e. microcrystalline cellulose (MCC) and cellulose pulp (CP). The morphologies of the obtained cellulose fibers were studied using scanning electron microscopy and optical microscopy. Results obtained showed that only particles with mean diameter about 1.2 μm could be obtained when MCC was used, even at high concentration (10 wt%). In the case of CP, an optimized concentration of 4 wt% resulted in standing fibers with a mean diameter of about 500nm. In order to improve the spinnability of the cellulose, different concentrations and ratios of PVA in combination with cellulose were investigated. The combination of cellulose (both MCC and CP) resulted in the formation of a unique fiber morphology, characterized by a homogeneous bead-like structure. An in-depth study of the fiber structure was carried out using Raman spectroscopy and showed that both cellulose and PVA were present in the formed beads. Finally, the challenge observed remained a complete removal of the solvents, which are not volatile enough, as well as explore a coagulation collection process for the fiber recovery in order to recover and re-use the employed solvent.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Cellulose; Electrospinning; Micro and nanofiber; Sustainability
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner
Research Institutions
Research Institutions > Affiliated Institutes
Research Institutions > Affiliated Institutes > Bavarian Polymer Institute (BPI)
Research Institutions > Collaborative Research Centers, Research Unit > SFB 840 Von partikulären Nanosystemen zur Mesotechnologie > SFB 840 - TP B 8
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 16 Oct 2021 21:00
Last Modified: 18 Oct 2021 05:24
URI: https://eref.uni-bayreuth.de/id/eprint/67369