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Surfactant properties of chemically modified chitooligosaccharides and their potential application in bitumen emulsions

Camille Chapelle 1 Ghislain David 1 Sylvain Caillol 1 Claire Negrell 1 Sylvain Catrouillet 1 Myriam Desroches Le Foll 2 Nathalie Azéma 3
1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
2 CST COLAS
3 DMS - Durabilité des éco-Matériaux et Structures
LMGC - Laboratoire de Mécanique et Génie Civil, IMT - MINES ALES - IMT - MINES ALES
Abstract : Chitooligosaccharides with degree of polymerization from 5 to 15 have been modified with different lipophilic chains, from fatty epoxide to fatty acids. Their interfacial properties such as critical micellar concentrations, interfacial rheology and interfacial tension were studied to establish structure-properties relationships. Their ability to self-assemble as well as their micellar shape were assessed by light scattering (dynamic and static) and transmission electron microscopic analyses. Finally, their emulsion stabilities and rheological properties were evaluated with Turbiscan and allow the conclusion that 1% (w/w) DP10 oligomers modified with Tall oil fatty acid was able to stabilize oil in water emulsions (60/40 w/w) for at least 55 days.
Keywords : Oligochitosan surfactant Amphiphilic structures Interfacial measurement Micellar shape Stability Oil in water emulsions
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https://hal.mines-ales.fr/hal-03325899
Contributor : Administrateur Imt - Mines Alès <>
Submitted on : Wednesday, September 1, 2021 - 3:20:57 PM
Last modification on : Wednesday, September 15, 2021 - 2:20:06 PM

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Camille Chapelle, Ghislain David, Sylvain Caillol, Claire Negrell, Sylvain Catrouillet, et al.. Surfactant properties of chemically modified chitooligosaccharides and their potential application in bitumen emulsions. Colloids and Surfaces A: Physicochemical and Engineering Aspects, Elsevier, 2021, 628, pp.127327. ⟨10.1016/j.colsurfa.2021.127327⟩. ⟨hal-03325899⟩

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