Electrospun Azo‐Cellulose Fabric: A Smart Polysaccharidic Photo‐Actuator - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Macromolecular Rapid Communications Année : 2022

Electrospun Azo‐Cellulose Fabric: A Smart Polysaccharidic Photo‐Actuator

Résumé

A natural polysaccharide-based smart photo-actuator is fabricated via electrospinning of cellulose 4-phenyl azobenzoate (Azo-Cel) from its organic solution in a mixture of high-volatile acetone, a poor solvent of Azo-Cel, and low-volatile N,Ndimethylacetamide (DMAc), a good solvent of Azo-Cel. At an optimal polymer concentration (17 wt%) and solvent mixing ratio (acetone/DMAc = 3/2 (v/v)), stable electrified polymer jets are formed and continuous nanofibers and their nonwoven fabric can be drawn on a cylindershaped rotating drum electrode under a high electric field (25 kV). Scanning electron microscopic observation of the Azo-Cel fabric confirms that the fabric consists of uniaxiallyaligned nanofibers with a mean diameter of 207 nm. The water contact angle of the Azo-Cel fabric reversibly decreases and increases in response to alternate irradiation with UV and visible light to induce geometric deformation of the azobenzene moiety between the trans and cis isomers, which lead to lower and higher surface free energies, respectively. In addition, selfstanding Azo-Cel fabric exhibits a UV-driven photo-mechanical asymmetric bending deformation toward the light source.
Fichier principal
Vignette du fichier
PREPRINT_HAL.pdf (1.46 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03669916 , version 1 (07-10-2022)

Identifiants

Citer

Hamed Ahmadi‐nohadani, Steve Nono‐tagne, Christopher Barrett, Issei Otsuka. Electrospun Azo‐Cellulose Fabric: A Smart Polysaccharidic Photo‐Actuator. Macromolecular Rapid Communications, 2022, 43 (9), pp.2200063. ⟨10.1002/marc.202200063⟩. ⟨hal-03669916⟩
41 Consultations
48 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More