Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.13091/2447
Title: Development of surface modified PU foam with improved oil absorption and reusability via an environmentally friendly and rapid pathway
Authors: Seah, Mei Qun
Ng, Zhi Chien
Lau, Woei Jye
Gürsoy, Mehmet
Karaman, Mustafa
Wong, Tuck-Whye
Ismail, Ahmad Fauzi
Keywords: Oil absorption
PU foam
Green approach
Hydrophobic
Plasma
Chemical-Vapor-Deposition
Polyurethane Sponge
Facile Method
Graphene
Removal
Issue Date: 2022
Publisher: Elsevier Sci Ltd
Abstract: Although the commercial polyurethane (PU) foams are hydrophobic in nature, they generally show low degree of reusability for oil and organic solvent absorption. In this work, we proposed a solvent-free and rapid surface functionalization approach based on chemical vapor deposition (CVD) process to improve the surface characteristics of PU foam, increasing not only its reusability but also its absorption capacity. Among the monomers used to functionalize the surface of foam, our results showed that only hexamethyldisiloxane (HMDSO) and 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA) were promising to increase the absorption performance of the control PU foam, owing to the enhanced foam's surface hydrophobicity (with contact angle increased from similar to 106 degrees to 120-135 degrees) without altering the foam's porosity. These promising features are attributed to the formation of ultrathin highly hydrophobic yet uniform layer on the foam surface. Further investigation indicated that the modified foams outperformed the control foam for the multicycle cyclohexane and crude oil absorption (up to 10 cycles) by showing significantly higher absorption capacity. The reusability of the modified foams could be further improved when ethanol was employed to rinse the saturated foam after each absorption cycle. Such solvent rinsing help in maintaining the foam absorption capacity. In conclusion, the proposed greener surface modification method clearly demonstrated its effectiveness in functionalizing the PU foam, leading to higher absorption capacity against cyclohexane and crude oil as well as higher degree of reusability.
URI: https://doi.org/10.1016/j.jece.2021.106817
https://hdl.handle.net/20.500.13091/2447
ISSN: 2213-2929
2213-3437
Appears in Collections:Mühendislik ve Doğa Bilimleri Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections

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