Article (Scientific journals)
Aldehyde-conjugated chitosan-graphene oxide glucodynamers: ternary cooperative assembly and controlled chemical release
Chabbi, Jamal; Aqil, Abdelhafid; Katir, Nadia et al.
2020In Carbohydrate Polymers, 230, p. 115634
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Keywords :
nanocomposite; graphene oxide; chitosan
Abstract :
[en] Simultaneous condensation of aromatic aldehydes (ArxCHO; x =1–4) on chitosan biopolymer (CS)affords, after water-evaporation, structurally-conjugated aryl-functionalized CS-Arx-ffilms. Similarly, cooperative assembly of two-dimensional nanometric graphene oxide (GO), aromatic aldehyde and chitosan provides transparent, flexible and crack-free aldehyde-functionalized, ternary-reinforced CS-Arx-GO-f nanocomposite films. Homogenous films were obtained using ortho-hydroxybenzaldehyde Ar1 while the para-hydroxybenzaldehyde Ar4 was prone to packing inside. Textural and mechanical properties were investigated and expectedly, sig- nificant improvement was found for CS-Ar1-GO-f because of the great dispersion of the aromatic and the pre- sence of the filler. The sensitivity of unsaturated C]N imine bond to hydrolysis was explored for triggering controlled release of aromatics from the as-prepared films. All of them were found to induce a time-dependent aromatic release. It has been moreover observed that the release was significantly delayed in CS-Arx-GO-f compared to CS-Arx-f, a fact attributed to the interplay of the ring with the basal and edges of graphene oxide, through π-π stacking and additional hydrogen bonding interactions. This finding shows that beyond the con- ventional wisdom using fillers for improving thermal and mechanical properties, the tiny carbon sheets can act as a regulator for aldehyde release, thereby providing a way for more controlled chemical delivery from confined nanocomposites.
Research center :
Research Unit, Center for Education and Research on Macromolecules (CERM)
Group of Research in Energy and ENvironment from MATerials (GREENMAT)
Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit
Disciplines :
Chemistry
Materials science & engineering
Author, co-author :
Chabbi, Jamal;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Center for Education and Research on Macromolecules (CERM), Belgium > Euro-Med University of Fes (UEMF), Euromed Research Center. Engineering Division, Morocco > Cadi Ayyad University, Laboratory of Organometallic and Macromolecular Chemistry-Composites Materials, Faculty of Sciences and Technologies, Morocco
Aqil, Abdelhafid ;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Center for Education and Research on Macromolecules (CERM), Belgium
Katir, Nadia
Vertruyen, Bénédicte  ;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM), Group of Research in Energy and ENvironment from MATerials (Greenmat) and Laboratory of Structural Inorganic Chemistry (LCIS), Belgium
Jérôme, Christine  ;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Center for Education and Research on Macromolecules (CERM), Belgium
Lahcini, Mohamed;  Cadi Ayyad University, Laboratory of Organometallic and Macromolecular Chemistry-Composites Materials, Faculty of Sciences and Technologies, Morocco > Mohammed VI Polytechnic University, Ben Guerir, Morocco
El Kadib, Abdelkrim;  Euro-Med University of Fes (UEMF), Euromed Research Center. Engineering Division, Morocco
Language :
English
Title :
Aldehyde-conjugated chitosan-graphene oxide glucodynamers: ternary cooperative assembly and controlled chemical release
Publication date :
15 February 2020
Journal title :
Carbohydrate Polymers
ISSN :
0144-8617
eISSN :
1879-1344
Publisher :
Elsevier, United Kingdom
Volume :
230
Pages :
115634
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 09 January 2020

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