Hydrophobization of oil sorbent based on chitin and polyurethane foam
Abstract
The rapidly-growing increase in the events of oil spills in the water environment motivates researchers to the fast development of oil sorbents. The oil pollution removal process requires a highly hydrophobic sorption material with suitable oil capacity. This study presents the results of preparing oil sorption material (PPU10C-SA) with improved hydrophobicity which is based on polyurethane foam and chitin sorbent (PPU10C) by impregnating it with the stearic acid (SA) solution. The influence of the impregnation time and concentration of SA on its content in the resulted sorbent and on its sorption capacity in relation to oil and water is studied. It is shown that the optimal conditions for obtaining the improved hydrophobized material are as follows: the concentration of SA – 0.01 g/ml and the impregnation time – 60 min. In this case, the oil capacity of the material reaches 12.54 g/g along with the water capacity of 1.44 g/g. Thus, the hydrophobicity of the modified sorbent has been increased 4 times in comparison with that of the unmodified material. The obtained results indicate that the SA-modified PPU10C-SA oil sorbent can be a promising sorbent for efficient water purification from spills of oil and oil products.
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