Organic Bio-Based Aerogel from Food Waste: Preparation and Hydrophobization
In this work, organic aerogels from spent ground coffee and apple pomace were prepared and characterized for the first time. Apple aerogel was found to be much lighter than that from coffee (0.19 vs. 0.016 g/cm<sup>3</sup>, whereas the specific surface areas are comparable (229 vs. 208 m...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/8/11/691 |
| _version_ | 1797468247738548224 |
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| author | Giulia Gaggero Raman P. Subrahmanyam Baldur Schroeter Pavel Gurikov Marina Delucchi |
| author_facet | Giulia Gaggero Raman P. Subrahmanyam Baldur Schroeter Pavel Gurikov Marina Delucchi |
| author_sort | Giulia Gaggero |
| collection | DOAJ |
| description | In this work, organic aerogels from spent ground coffee and apple pomace were prepared and characterized for the first time. Apple aerogel was found to be much lighter than that from coffee (0.19 vs. 0.016 g/cm<sup>3</sup>, whereas the specific surface areas are comparable (229 vs. 208 m<sup>2</sup>/g). Being intrinsically hydrophilic, these aerogels were silanized, both in liquid and gas phase, to increase stability in aqueous media. The latter modification method allowed chemical grafting of the silane to the aerogel surface (evidenced by FTIR and TGA) and resulted in certain hydrophobicity, as was evidenced via contact angle measurements: both aerogels possess a contact angle of ca. 100° after the gas hydrophobization, while for the pristine aerogels it was 50°. Furthermore, it was observed that the gas-phase silanization process is more applicable to apple aerogels. |
| first_indexed | 2024-03-09T19:03:45Z |
| format | Article |
| id | doaj.art-a6607db3a4ea44598e5ddcf5a36ed521 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-09T19:03:45Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-a6607db3a4ea44598e5ddcf5a36ed5212023-11-24T04:46:11ZengMDPI AGGels2310-28612022-10-0181169110.3390/gels8110691Organic Bio-Based Aerogel from Food Waste: Preparation and HydrophobizationGiulia Gaggero0Raman P. Subrahmanyam1Baldur Schroeter2Pavel Gurikov3Marina Delucchi4Department of Civil, Chemical and Environmental Engineering, University of Genoa, Via All’Opera Pia 15, 16145 Genoa, ItalyInstitute of Thermal Separation Processes, Hamburg University of Technology, Eißendorfer Straße 38, 21073 Hamburg, GermanyInstitute of Thermal Separation Processes, Hamburg University of Technology, Eißendorfer Straße 38, 21073 Hamburg, GermanyLaboratory for Development and Modelling of Novel Nanoporous Materials, Hamburg University of Technology, Eissendorfer Strasse 38, 21073 Hamburg, GermanyDepartment of Civil, Chemical and Environmental Engineering, University of Genoa, Via All’Opera Pia 15, 16145 Genoa, ItalyIn this work, organic aerogels from spent ground coffee and apple pomace were prepared and characterized for the first time. Apple aerogel was found to be much lighter than that from coffee (0.19 vs. 0.016 g/cm<sup>3</sup>, whereas the specific surface areas are comparable (229 vs. 208 m<sup>2</sup>/g). Being intrinsically hydrophilic, these aerogels were silanized, both in liquid and gas phase, to increase stability in aqueous media. The latter modification method allowed chemical grafting of the silane to the aerogel surface (evidenced by FTIR and TGA) and resulted in certain hydrophobicity, as was evidenced via contact angle measurements: both aerogels possess a contact angle of ca. 100° after the gas hydrophobization, while for the pristine aerogels it was 50°. Furthermore, it was observed that the gas-phase silanization process is more applicable to apple aerogels.https://www.mdpi.com/2310-2861/8/11/691aerogelbio-basedorganichydrophobization |
| spellingShingle | Giulia Gaggero Raman P. Subrahmanyam Baldur Schroeter Pavel Gurikov Marina Delucchi Organic Bio-Based Aerogel from Food Waste: Preparation and Hydrophobization Gels aerogel bio-based organic hydrophobization |
| title | Organic Bio-Based Aerogel from Food Waste: Preparation and Hydrophobization |
| title_full | Organic Bio-Based Aerogel from Food Waste: Preparation and Hydrophobization |
| title_fullStr | Organic Bio-Based Aerogel from Food Waste: Preparation and Hydrophobization |
| title_full_unstemmed | Organic Bio-Based Aerogel from Food Waste: Preparation and Hydrophobization |
| title_short | Organic Bio-Based Aerogel from Food Waste: Preparation and Hydrophobization |
| title_sort | organic bio based aerogel from food waste preparation and hydrophobization |
| topic | aerogel bio-based organic hydrophobization |
| url | https://www.mdpi.com/2310-2861/8/11/691 |
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