Polysaccharides enzymatic modification to control the coacervation or the aggregation behavior: a thermodynamic study
| Autor: | Lionel Muniglia, Marie E. Vuillemin, Aurélie Seiler, Michel Linder, Jordane Jasniewski, Florentin Michaux |
|---|---|
| Přispěvatelé: | Laboratoire d'Ingénierie des Biomolécules (LIBio), Université de Lorraine (UL), Impact Biomolécules, ANR-15-IDEX-0004,LUE,Isite LUE(2015) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
food.ingredient
General Chemical Engineering Interactions Supramolecular chemistry Stacking 02 engineering and technology 010402 general chemistry 01 natural sciences Chitosan chemistry.chemical_compound Gum Arabic food Supramolecular structures [SDV.IDA]Life Sciences [q-bio]/Food engineering Zeta potential [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering chemistry.chemical_classification Coacervate Isothermal titration calorimetry General Chemistry Polymer [CHIM.CATA]Chemical Sciences/Catalysis [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences [SDV.BBM.BP]Life Sciences [q-bio]/Biochemistry Molecular Biology/Biophysics [CHIM.POLY]Chemical Sciences/Polymers chemistry Chemical engineering Complex coacervation Gum arabic 0210 nano-technology Food Science |
| Zdroj: | Food Hydrocolloids Food Hydrocolloids, Elsevier, 2021, 122, pp.107092. ⟨10.1016/j.foodhyd.2021.107092⟩ |
| ISSN: | 0268-005X 1873-7137 |
| DOI: | 10.1016/j.foodhyd.2021.107092⟩ |
| Popis: | International audience; The effect of enzymatic modification of polysaccharides on the formed supramolecular structures was studied. Gum Arabic and chitosan were modified by covalent grafting of ferulic acid oxidation products so that they could establish new interactions such as π interactions. The stoichiometry of the interaction was studied by ITC measurements, as well as its strength and related thermodynamic parameters. These experiments were supported by Zeta potential and turbidity measurements and optical macroscopy observations. Grafting of phenolic compounds onto the polymers increased their ability to exhibit π-π stacking and π-cation interactions and led to the formation of various supramolecular structures. For native gum Arabic and chitosan assemblies, the stoichiometry value determined by ITC was consistent with optical microscopy, macroscopic observations and Zeta potential (around a molar ratio gum Arabic:chitosan of 3). The structures formed were coacervates. For the modified polymers, the optimal molar ratio determined by Zeta potential measurements (3.27) differed from the one determined by ITC (6.3). This meant the formation aggregates was not only due to electrostatic interactions but also to other type of interactions (new π-π stacking and π-cation interactions). It was concluded that by modifying the polymers, it was possible to control the supramolecular structures formed |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect