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Open AccessArticle

Alkyl-Chitosan-Based Adhesive: Water Resistance Improvement

1
Clermont Auvergne University, CNRS, SIGMA Clermont, Institut Pascal, F-63000 Clermont-Ferrand, France
2
Normandie Univ, UNIROUEN, Glyco-MEV EA 4358, Glycobiology and Plant Molecular Matrix, EA 4358, 76000 Rouen, France
3
Normandie Univ, UNIROUEN, SFR NORVEGE, 76000 Rouen, France
4
IRSTEA, Laboratory of Engineering for Complex Systems, 9 avenue Blaise Pascal, CS 20085, 63178 Aubière, France
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Université de Pau et des Pays de l’Adour (UPPA), IPREM, UMR 5254 CNRS/UPPA, Helioparc Pau Pyrénées, 2 avenue P. Angot, 64053 PAU CEDEX 09, France
*
Author to whom correspondence should be addressed.
Academic Editor: Dimitrios Bikiaris
Molecules 2019, 24(10), 1987; https://doi.org/10.3390/molecules24101987
Received: 4 April 2019 / Revised: 21 May 2019 / Accepted: 21 May 2019 / Published: 23 May 2019
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. View Full-Text
Keywords: chitosan; alkylation; adhesive; water resistance chitosan; alkylation; adhesive; water resistance
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Mati-Baouche, N.; Delattre, C.; de Baynast, H.; Grédiac, M.; Mathias, J.-D.; Ursu, A.V.; Desbrières, J.; Michaud, P. Alkyl-Chitosan-Based Adhesive: Water Resistance Improvement. Molecules 2019, 24, 1987.

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