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

We report the use of the DBU-CO 2 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 micros...

Full description

Saved in:
Bibliographic Details
Published in:Cellulose (London) 2021-07, Vol.28 (11), p.6869-6880
Main Authors: Heidari, Mina, Onwukamike, Kelechukwu N., Grau, Etienne, Grelier, Stéphane, Cramail, Henri, Meier, Michael A. R., Greiner, Andreas
Format: Article
Language:English
Subjects:
Beads
Bioorganic Chemistry
Carbon dioxide
Cellulose
Cellulose fibers
Cellulose pulp
Ceramics
Chemical Sciences
Chemistry
Chemistry and Materials Science
Coagulation
Composites
Crystalline cellulose
Electrospinning
Glass
Microscopy
Morphology
Natural Materials
Optical microscopy
Organic Chemistry
Original Research
Physical Chemistry
Polymer Sciences
Polymers
Raman spectroscopy
Solvents
Sustainable Development
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report the use of the DBU-CO 2 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. Graphic abstract
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-021-03967-8