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Article

Multiscale Structure of Starches Grafted with Hydrophobic Groups: A New Analytical Strategy

by
Chloé Volant
1,
Alexandre Gilet
2,
Fatima Beddiaf
3,
Marion Collinet-Fressancourt
4,5,
Xavier Falourd
3,6,
Nicolas Descamps
7,
Vincent Wiatz
7,
Hervé Bricout
2,
Sébastien Tilloy
2,
Eric Monflier
2,*,
Claude Quettier
7,
Ahmed Mazzah
1 and
Agnès Rolland-Sabaté
3,8,*
1
University Lille, CNRS, USR3290—MSAP—Miniaturisation pour la Synthèse, l’Analyse et la Protéomique, F-59000 Lille, France
2
University Artois, CNRS, Centrale Lille, University Lille, UMR 8181—UCCS—Unité de Catalyse et Chimie du Solide, F-62300 Lens, France
3
INRAE, UR BIA, F-44316 Nantes, France
4
CIRAD, UPR Recyclage et Risque, F-97743 Saint-Denis, Réunion, France
5
University Montpellier, Recyclage et Risque, CIRAD, 34398 Montpellier, France
6
INRAE, BIBS Facility, F-44316 Nantes, France
7
ROQUETTE Frères, Rue de la Haute Loge, 62136 Lestrem, France
8
INRAE, Université d’Avignon, UMR SQPOV, F-84914 Avignon, France
*
Authors to whom correspondence should be addressed.
Molecules 2020, 25(12), 2827; https://doi.org/10.3390/molecules25122827
Submission received: 28 May 2020 / Revised: 17 June 2020 / Accepted: 17 June 2020 / Published: 18 June 2020
(This article belongs to the Special Issue Natural Polymers and Biopolymers II)
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Abstract

Starch, an abundant and low-cost plant-based glucopolymer, has great potential to replace carbon-based polymers in various materials. In order to optimize its functional properties for bioplastics applications chemical groups need to be introduced on the free hydroxyl groups in a controlled manner, so an understanding of the resulting structure-properties relationships is therefore essential. The purpose of this work was to study the multiscale structure of highly-acetylated (degree of substitution, 0.4 < DS ≤ 3) and etherified starches by using an original combination of experimental strategies and methodologies. The molecular structure and substituents repartition were investigated by developing new sample preparation strategies for specific analysis including Asymmetrical Flow Field Flow Fractionation associated with Multiangle Laser Light Scattering, Nuclear Magnetic Resonance (NMR), Raman and Time of Flight Secondary Ion Mass spectroscopies. Molar mass decrease and specific ways of chain breakage due to modification were pointed out and are correlated to the amylose content. The amorphous structuration was revealed by solid-state NMR. This original broad analytical approach allowed for the first time a large characterization of highly-acetylated starches insoluble in aqueous solvents. This strategy, then applied to characterize etherified starches, opens the way to correlate the structure to the properties of such insoluble starch-based materials.
Keywords: acetylated starch; etherified starch; chemical composition; macromolecular characteristics; surface characterization acetylated starch; etherified starch; chemical composition; macromolecular characteristics; surface characterization
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MDPI and ACS Style

Volant, C.; Gilet, A.; Beddiaf, F.; Collinet-Fressancourt, M.; Falourd, X.; Descamps, N.; Wiatz, V.; Bricout, H.; Tilloy, S.; Monflier, E.; et al. Multiscale Structure of Starches Grafted with Hydrophobic Groups: A New Analytical Strategy. Molecules 2020, 25, 2827. https://doi.org/10.3390/molecules25122827

AMA Style

Volant C, Gilet A, Beddiaf F, Collinet-Fressancourt M, Falourd X, Descamps N, Wiatz V, Bricout H, Tilloy S, Monflier E, et al. Multiscale Structure of Starches Grafted with Hydrophobic Groups: A New Analytical Strategy. Molecules. 2020; 25(12):2827. https://doi.org/10.3390/molecules25122827

Chicago/Turabian Style

Volant, Chloé, Alexandre Gilet, Fatima Beddiaf, Marion Collinet-Fressancourt, Xavier Falourd, Nicolas Descamps, Vincent Wiatz, Hervé Bricout, Sébastien Tilloy, Eric Monflier, and et al. 2020. "Multiscale Structure of Starches Grafted with Hydrophobic Groups: A New Analytical Strategy" Molecules 25, no. 12: 2827. https://doi.org/10.3390/molecules25122827

APA Style

Volant, C., Gilet, A., Beddiaf, F., Collinet-Fressancourt, M., Falourd, X., Descamps, N., Wiatz, V., Bricout, H., Tilloy, S., Monflier, E., Quettier, C., Mazzah, A., & Rolland-Sabaté, A. (2020). Multiscale Structure of Starches Grafted with Hydrophobic Groups: A New Analytical Strategy. Molecules, 25(12), 2827. https://doi.org/10.3390/molecules25122827

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