Alkyl-Chitosan-Based Adhesive: Water Resistance Improvement

Narimane Mati-Baouche (1, 2) , Cédric Delattre (1) , Hélène de Baynast (1) , Michel Grediac (1) , Jean-Denis Mathias (3) , Alina Violeta Ursu (1) , Jacques Desbrieres (4) , Philippe Michaud (1)

1 IP - Institut Pascal
2 Glyco-MEV - Laboratoire de Glycobiologie et Matrice Extracellulaire Végétale
3 UR LISC - Laboratoire d'ingénierie pour les systèmes complexes
4 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux

A chemical modification by grafting alkyl chains using an octanal (C8) on chitosan was conducted with the aim to improve its water resistance for bonding applications. The chemical structure of the modified polymers was determined by NMR analyses revealing two alkylation degrees (10 and 15%). In this study, the flow properties of alkyl-chitosans were also evaluated. An increase in the viscosity was observed in alkyl-chitosan solutions compared with solutions of the same concentration based on native chitosan. Moreover, the evaluation of the adhesive strength (bond strength and shear stress) of both native and alkyl-chitosans was performed on two different double-lap adherends (aluminum and wood). Alkyl-chitosans (10 and 15%) maintain sufficient adhesive properties on wood and exhibit better water resistance compared to native chitosan.

Mots clés: water resistance; chitosan; alkylation; adhesive

Domaines: Biologie végétale; Biotechnologies; Amélioration des plantes; Biologie moléculaire; Biologie cellulaire; Biochimie [q-bio.BM]; Biologie du développement; Interactions cellulaires [q-bio.CB]; Organisation et fonctions cellulaires [q-bio.SC]; Polymères; Génomique, Transcriptomique et Protéomique [q-bio.GN]; Phytopathologie et phytopharmacie

Narimane Mati-Baouche, Cédric Delattre, Hélène de Baynast, Michel Grediac, Jean-Denis Mathias, et al.. Alkyl-Chitosan-Based Adhesive: Water Resistance Improvement. Molecules, 2019, 24 (10), pp.1987. ⟨10.3390/molecules24101987⟩. ⟨hal-02138130⟩