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Nano-based systems for oil spills control and cleanup£¬Journal  of  Hazardous  Materials272  (2014) 20¨C27. Ó°ÏìÒò×Ó£º4.331
ÕªÒª£ºThis paper reports the development of uperhydrophobic nanocomposite  systems which are also oleophilic. As hydrophobicity is based on low energy  surface and surface roughness, the electrospinning technique was selected as the  manufacturing technique. N,N-dimethylformamide (DMF) was employed as the  polystyrene (PS) solvent. The ¡°Tea-bag¡± (T-B) nanocomposite system is based on  exfoliated graphite surrounded by PS superhydrophobic membranes. The T-B  systems were tested regarding its adsorption and absorption rates. To test these  properties, it was employed three different water/oil emulsions, i.e., new and used  motor oil, which have physical properties (viscosity and specific gravity) similar to heavy crude oil extracted in Brazil, and vacuum pump oil (which does not form  oil/water emulsion). It was observed that oil adsorption rate is dependent on oil  surface tension, while the absorption rate is mainly dependent on  membrane/exfoliated graphite surface area. Experimental data show that oil absorption rates ranged between 2.5  g/g and 40  g/g, while the adsorption rate  oscillated from 0.32 g/g/min to 0.80 g/g/min. Furthermore, T-B systems were tested  as containment barriers and sorbent materials with good results including its  recyclability.
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