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Published in: Cellulose 11/2019

25-06-2019 | Original Research

Electrospinning of photo-responsive Azo-Cellulose: towards smart fibrous materials

Authors: Issei Otsuka, Christopher J. Barrett

Published in: Cellulose | Issue 11/2019

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Abstract

Fabrication of nano/micro fibers of a photo-responsive cellulose derivative via electrospinning is demonstrated for the first time. Commercially available microcrystalline cellulose (Avicel®) is functionalized with a reversible molecular photo-switch, azobenzene, via esterification between the hydroxyl groups of cellulose and 4-(phenylazo)benzoyl chloride in anhydrous pyridine. The obtained azobenzene-functionalized cellulose (Azo-Cel) is soluble in several organic solvents that are commonly used for electrospinning, such as dichloromethane (DCM), tetrahydrofuran (THF), and N,N’-dimethylformamide (DMF). UV-Vis absorption spectral analysis of Azo-Cel solutions confirm successful reversible cis/trans isomerization of the azobenzene moiety via photo-irradiation and thermal relaxation. The electrospinning of Azo-Cel solutions in high-volatile DCM, low-volatile DMF, and their mixtures is investigated. The morphology of the electrospun products characterized by scanning electron microscopy varies from porous/non-porous fibers to irregular spherical beads, depending on the volatility of the solvent.

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Appendix
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Literature
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go back to reference Sridhar R, Lakshminarayanan R, Madhaiyan K, Amutha Barathi V, Lim KHC, Ramakrishna S (2015) Electrosprayed nanoparticles and electrospun nanofibers based on natural materials: applications in tissue regeneration, drug delivery and pharmaceuticals. Chem Soc Rev 44:790–814. https://doi.org/10.1039/C4CS00226A CrossRefPubMed Sridhar R, Lakshminarayanan R, Madhaiyan K, Amutha Barathi V, Lim KHC, Ramakrishna S (2015) Electrosprayed nanoparticles and electrospun nanofibers based on natural materials: applications in tissue regeneration, drug delivery and pharmaceuticals. Chem Soc Rev 44:790–814. https://​doi.​org/​10.​1039/​C4CS00226A CrossRefPubMed
Metadata
Title
Electrospinning of photo-responsive Azo-Cellulose: towards smart fibrous materials
Authors
Issei Otsuka
Christopher J. Barrett
Publication date
25-06-2019
Publisher
Springer Netherlands
Published in
Cellulose / Issue 11/2019
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-019-02585-9

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