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Hydrophobically modified nano-SiO2 in situ loaded on polyurethane foam as a potential carrier for marine oil spill |
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| Authors: | Yan Hu Longfang Ren Zheng Tang Taotao Qiang |
| Affiliation: | 1. College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi, China
National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an, China Contribution: Data curation (equal), Formal analysis (equal), Investigation (equal), Writing - review & editing (equal);2. College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi, China;3. College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi, China National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an, China Contribution: Formal analysis (equal), Investigation (equal), Methodology (equal), Writing - original draft (equal);4. College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi, China National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an, China Contribution: Conceptualization (equal), Methodology (equal), Supervision (lead) |
| Abstract: | In order to enhance the oil–water separation properties of polyurethane foam (PFU), hydrophobic silica nanoparticles (H-SiO2 NPs) were firstly prepared by incorporating long alkyl chains into silica nanoparticles, and then, it was combined with PFU by in situ loading to fabricate a hydrophobic PFU (H-SiO2 NPs/PUF). When the loading amount of H-SiO2 NPs was 10%, the water contact angle of the modified foam H-SiO2 NPs/PUF-10 reached 147 ± 1°, which proved it was highly hydrophobic. The elongation at break of the foam was increased by 202%, which indicated that it had better resilience and recyclability. In addition, the total pore area and porosity were increased to 16.24 m2/g and 88.43% from 5.46 m2/g and 2.11%, which provided more storage space for adsorption. The oil–water separation experiment showed that the adsorption capacity for most light oils was 11–13 g/g, and that for dichloromethane was as high as 40.5 g/g. After 10 adsorption–desorption cycles, the adsorption capacity only decreased from 15.6 to 14.5 g/g, which was still 93% of the initial adsorption capacity. H-SiO2 NPs/PUF represents good adsorption capacity, recyclability, and recyclability, so it as a carrier has a potential application in the treatment of marine oil spills. |
| Keywords: | hydrophobicity oil–water separation polyurethane foam silica nanoparticles |
