Journal
AICHE JOURNAL
Volume 63, Issue 6, Pages 2232-2240Publisher
WILEY
DOI: 10.1002/aic.15629
Keywords
oil spills; absorption; polyurethane foam; oil; water separation; silanization
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Funding
- National Basic Research Program of China [2015CB655301]
- Natural Science Research Program of the Jiangsu Higher Education Institutions [13KJA430005]
- Natural Science Foundation of Jiangsu Province [BK20150063]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Absorption is an effective method to collect oil spills and solvent leakages from water. However, the currently used oil absorbents are still suffering from high cost, tedious preparation, and low recyclability. In this work, we report an extremely simple and low-cost strategy to produce oil absorbents by directly coupling alkoxysilane onto the surface of polyurethane (PU) foams. Such direct silanization renders the initially amphiphilic foams a strong hydrophobicity and consequently a water-repelling and oil-absorptive functionality. The silanized foams exhibit highest absorption capacities as well as best recyclability among all PU-based oil absorbents. More practically, the silanized PU foams can be used to recover crude oil spills with an absorption capacity of higher than 75 times of their own weight, and maintain 90% of the initial absorption capacity after eight times reusage. Interestingly, we invent portable oil suckers for continuous oil absorption from water by filling vacuum cleaners with the silanized foams. (c) 2017 American Institute of Chemical Engineers AIChE J, 63: 2232-2240, 2017
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