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Organic bio-based aerogel from food waste : preparation and hydrophobization
Citation Link: https://doi.org/10.15480/882.4671
Publikationstyp
Journal Article
Date Issued
2022-10-26
Sprache
English
TORE-DOI
Journal
Volume
8
Issue
11
Article Number
691
Citation
Gels 8 (11): 691 (2022)
Publisher DOI
Scopus ID
Publisher
Multidisciplinary Digital Publishing Institute
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/cm₃, whereas the specific surface areas are comparable (229 vs. 208 m₂/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.
Subjects
aerogel
bio-based
organic
hydrophobization
DDC Class
540: Chemie
570: Biowissenschaften, Biologie
Publication version
publishedVersion
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