Hydrophobic,superabsorbing materials from reduced graphene oxide/MoS2 polyurethane foam as a promising sorbent for oil and organic solvents |
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| Institution: | 3. Department of Mechanical Engineering, St Joseph Engineering College, Mangaluru, 575028, India;1. School of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi, 710021, China;2. School of Materials Science & Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China;1. Institute of Green Chemistry and Chemical Technology, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China;2. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China;1. Department of Industrial Equipment and Control Engineering, South China University of Technology, Guangzhou 510640, China;2. Department of Mechanical Engineering, University of Wisconsin–Madison, Madison, WI 53706, USA;3. Wisconsin Institutes for Discovery, University of Wisconsin–Madison, Madison, WI 53715, USA |
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| Abstract: | This study illustrates the preparation of robust superhydrophobic and superoleophilic reduced graphene oxide (rGO) and MoS2 nanoparticles incorporated polyurethane (PU) foam by in-situ polymerization via the one-shot method. Spectroscopic analyses confirmed the successful formation of nanoparticles and also the development of the hybrid PU material. The sponges were evaluated based on hydrophobicity and oil absorbance capacities and the modified foam exhibits the water contact angle of 151°. The pore size of the foam analyzed using an optical microscope and the effect on the density and porosity were also analyzed. The oil absorption capacity of the foam was studied using standard sorption testing. The oil and organic solvent selectivity and recyclability of hybrid PU foam were performed to estimate whether the foams could be recycled and reused. The modified system shows very high selectivity (83–94%). The recyclability of the foam was about 35 cycles without much reduction in its own weight and after 55 cycles more than 80% of the oil absorption capacity was conserved. The resulting hybrid PU material is highly efficient, porous, ultralight, hydrophobic and reusable sorbent material and displays great potential for versatile environmental remediation. |
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| Keywords: | Hybrid PU foams Water contact angle Selectivity Recyclability Sorption capacity |
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