Some petroleum products have been shown to swell significantly two classes of materials--(1) amino-substituted polysiloxanes, crosslinked either ionically by ammonium dithiocarbamates or covalently by thioureas, and (2) (R)-N-alkyl-12-hydroxyoctadecylammonium salts dispersed in methanol. The efficiency of uptake (measured as % weight increase) of the polysiloxanes, more than 1000% for some liquids, depends on the ionic or covalent nature of the crosslinks and the degree of amino substitution (among other factors). The ammonium salts form gels or jelly-like materials when swelled. The uptake of the organic liquids occurs rapidly. Because the density of the swelling materials is less than one, they can coagulate rapidly liquids with densities less than one from water mixtures. Results with both classes of materials, including their preparation, swelling capacities as a function of structural modifications, reusability, and other properties will be discussed. We thank the National Science Foundation and the Gulf of Mexico Research Initiative for their financial support.

Uptake and dispersion of petroleum products from water using (<i>R</i>)-<i>N</i>-Alkyl-12-hydroxyoctadecylammonium salts and ammonium dithiocarbamates of amino-substituted polysiloxanes

243rd National Meeting (2012)

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Uptake and dispersion of petroleum products from water using (R)-N-Alkyl-12-hydroxyoctadecylammonium salts and ammonium dithiocarbamates of amino-substituted polysiloxanes