Reusable organosilicon hybrid sorbents with tunable oil interest via PEG-PPG copolymer

Abstract

Synthetic polymers having hydrophobic cross-linked structures in order to remove oil spills have been gaining interest in environmental applications. Herein, a series of sorbents were produced by using PEG-b-PPG and PEG-co-PPG triols and organosilane cross-linker via bulk polymerization. The polymer sorbents were characterized by FTIR, thermal gravimetric analysis, scanning electron microscopy (SEM), and their interests towards polar and nonpolar solvents were examined via swelling, absorption-desorption kinetics and reusability tests. Besides, the effect of block-, copolymer-of PEG and PPG triol macromonomer on oil and water absorbency is investigated. The obtained sorbents exhibited high and quick absorption abilities towards organic liquids that were in the range of 5–28 gg-1. Moreover, they can selectively remove the oil from oil/water mixtures and can repeatedly be applied for absorbing oils. The reusability test shows that the polymer sorbents maintained their absorption-desorption loop with no structural change or capacity loss after 10 cycles. These results show the promising potential of the sorbents for the purging of water from oils in environmental applications.