Impact of Hydrophobic and Electrostatic Forces on the Adsorption of <i>Acacia</i> Gum on Oxide Surfaces Revealed by QCM-D
The adsorption of <i>Acacia</i> gum from two plant exudates, <i>A. senegal</i> and <i>A. seyal</i>, at the solid-liquid interface on oxide surfaces was studied using a quartz crystal microbalance with dissipation monitoring (QCM-D). The impact of the hydrophobic a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Colloids and Interfaces |
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| Online Access: | https://www.mdpi.com/2504-5377/7/2/26 |
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| author | Athénaïs Davantès Michaël Nigen Christian Sanchez Denis Renard |
| author_facet | Athénaïs Davantès Michaël Nigen Christian Sanchez Denis Renard |
| author_sort | Athénaïs Davantès |
| collection | DOAJ |
| description | The adsorption of <i>Acacia</i> gum from two plant exudates, <i>A. senegal</i> and <i>A. seyal</i>, at the solid-liquid interface on oxide surfaces was studied using a quartz crystal microbalance with dissipation monitoring (QCM-D). The impact of the hydrophobic and electrostatic forces on the adsorption capacity was investigated by different surface, hydrophobicity, and charge properties, and by varying the ionic strength or the pH. The results highlight that hydrophobic forces have higher impacts than electrostatic forces on the <i>Acacia</i> gum adsorption on the oxide surface. The <i>Acacia</i> gum adsorption capacity is higher on hydrophobic surfaces compared to hydrophilic ones and presents a higher stability with negatively charged surfaces. The structural configuration and charge of <i>Acacia</i> gum in the first part of the adsorption process are important parameters. <i>Acacia</i> gum displays an extraordinary ability to adapt to surface properties through rearrangements, conformational changes, and/or dehydration processes in order to reach the steadiest state on the solid surface. Rheological analysis from QCM-D data shows that the <i>A. senegal</i> layers present a viscous behavior on the hydrophilic surface and a viscoelastic behavior on more hydrophobic ones. On the contrary, <i>A. seyal</i> layers show elastic behavior on all surfaces according to the Voigt model or a viscous behavior on the hydrophobic surface when considering the power-law model. |
| first_indexed | 2024-03-11T02:36:43Z |
| format | Article |
| id | doaj.art-5181b670d79048738bc4fcae4adb2a38 |
| institution | Directory Open Access Journal |
| issn | 2504-5377 |
| language | English |
| last_indexed | 2024-03-11T02:36:43Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Colloids and Interfaces |
| spelling | doaj.art-5181b670d79048738bc4fcae4adb2a382023-11-18T09:53:21ZengMDPI AGColloids and Interfaces2504-53772023-03-01722610.3390/colloids7020026Impact of Hydrophobic and Electrostatic Forces on the Adsorption of <i>Acacia</i> Gum on Oxide Surfaces Revealed by QCM-DAthénaïs Davantès0Michaël Nigen1Christian Sanchez2Denis Renard3INRAE, UR BIA, 44316 Nantes, FranceUMR IATE, Université Montpellier, INRAE, Institut Agro, 34060 Montpellier, FranceUMR IATE, Université Montpellier, INRAE, Institut Agro, 34060 Montpellier, FranceINRAE, UR BIA, 44316 Nantes, FranceThe adsorption of <i>Acacia</i> gum from two plant exudates, <i>A. senegal</i> and <i>A. seyal</i>, at the solid-liquid interface on oxide surfaces was studied using a quartz crystal microbalance with dissipation monitoring (QCM-D). The impact of the hydrophobic and electrostatic forces on the adsorption capacity was investigated by different surface, hydrophobicity, and charge properties, and by varying the ionic strength or the pH. The results highlight that hydrophobic forces have higher impacts than electrostatic forces on the <i>Acacia</i> gum adsorption on the oxide surface. The <i>Acacia</i> gum adsorption capacity is higher on hydrophobic surfaces compared to hydrophilic ones and presents a higher stability with negatively charged surfaces. The structural configuration and charge of <i>Acacia</i> gum in the first part of the adsorption process are important parameters. <i>Acacia</i> gum displays an extraordinary ability to adapt to surface properties through rearrangements, conformational changes, and/or dehydration processes in order to reach the steadiest state on the solid surface. Rheological analysis from QCM-D data shows that the <i>A. senegal</i> layers present a viscous behavior on the hydrophilic surface and a viscoelastic behavior on more hydrophobic ones. On the contrary, <i>A. seyal</i> layers show elastic behavior on all surfaces according to the Voigt model or a viscous behavior on the hydrophobic surface when considering the power-law model.https://www.mdpi.com/2504-5377/7/2/26adsorptionoxidearabinogalactan-proteinviscoelasticrheologyinterface |
| spellingShingle | Athénaïs Davantès Michaël Nigen Christian Sanchez Denis Renard Impact of Hydrophobic and Electrostatic Forces on the Adsorption of <i>Acacia</i> Gum on Oxide Surfaces Revealed by QCM-D Colloids and Interfaces adsorption oxide arabinogalactan-protein viscoelastic rheology interface |
| title | Impact of Hydrophobic and Electrostatic Forces on the Adsorption of <i>Acacia</i> Gum on Oxide Surfaces Revealed by QCM-D |
| title_full | Impact of Hydrophobic and Electrostatic Forces on the Adsorption of <i>Acacia</i> Gum on Oxide Surfaces Revealed by QCM-D |
| title_fullStr | Impact of Hydrophobic and Electrostatic Forces on the Adsorption of <i>Acacia</i> Gum on Oxide Surfaces Revealed by QCM-D |
| title_full_unstemmed | Impact of Hydrophobic and Electrostatic Forces on the Adsorption of <i>Acacia</i> Gum on Oxide Surfaces Revealed by QCM-D |
| title_short | Impact of Hydrophobic and Electrostatic Forces on the Adsorption of <i>Acacia</i> Gum on Oxide Surfaces Revealed by QCM-D |
| title_sort | impact of hydrophobic and electrostatic forces on the adsorption of i acacia i gum on oxide surfaces revealed by qcm d |
| topic | adsorption oxide arabinogalactan-protein viscoelastic rheology interface |
| url | https://www.mdpi.com/2504-5377/7/2/26 |
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