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Hydrophobic aerogels from vinyl polymers derived from radical polymerization : proof of concept
Citation Link: https://doi.org/10.15480/882.13387
Publikationstyp
Journal Article
Date Issued
2024-06-14
Sprache
English
Author(s)
TORE-DOI
Article Number
2400147
Citation
Macromolecular Rapid Communications: 2400147 (2024)
Publisher DOI
Scopus ID
Publisher
Wiley
Hydrophilicity is one important drawback of bio-based aerogels. To overcome this issue, a novel approach for the preparation of mesoporous, water repellent aerogels is introduced, which combines synthesis of crosslinked bio-based copolymers from methacrylate copolymerizations, followed by solvent exchange and supercritical drying steps. The influence of monomers with different non-polar ester groups (methyl, vanillin, tetrahydrofurfuryl) on textural properties and water contact angles of the dry products is assessed. Final aerogels show generally high overall porosities (∼ 96%), low densities (0.07 – 0.11 g cm−3) as well as fine, mainly mesoporous networks, and specific surface areas in the range of 120 – 240 m2 g−1. Hereby, choice of the methacrylate ester groups results in differences of the resulting pore-size distributions. Water repellency tests show stable static water contact angles in the hydrophobic range (∼ 100 °) achieved for the substrate containing the vanillin ester group. On the contrary the other substrates absorb water quickly, which indicates a decisive role of the ester group. The presented approach opens up a new pathway to bio-based aerogels with intrinsic hydrophobicity. It is suggested that the properties are tailored by the choice of the monomer structure, hence enabling further adaption and optimization of the products.
DDC Class
540: Chemistry
Publication version
publishedVersion
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Macromolecular Rapid Communications - 2024 - Adolfs - Hydrophobic Aerogels from Vinyl Polymers Derived from Radical.pdf
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