Nano-based systems for oil spills control and cleanup
Nano-based systems for oil spills control and cleanup
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DOI：
10.1016/j.jhazmat.2014.02.038
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发表时间：
2014-05-15
影响因子：
13.6
通讯作者：
Goncalves, Camila P.
中科院分区：
文献类型：
--
作者：
Avila, Antonio F.;Munhoz, Viviane C.;Goncalves, Camila P.
本文报道了亲油超疏水纳米复合材料体系的研究进展。由于疏水性以低能表面和表面粗糙度为基础，因此选择静电纺丝技术作为制备工艺。采用N，N'二甲基甲酰胺（DMF）作为聚苯乙烯（PS）的溶剂。“茶包”（T-B）纳米复合材料体系是基于剥离石墨包裹在PS超疏水膜上。对T-B体系的吸附和吸收率进行了测试。为了测试这些性能，使用了三种不同的水/油乳剂，即具有与巴西开采的重质原油相似的物理特性（粘度和比重）的新机油和二手机油，以及不形成油/水乳剂的真空泵油。结果表明，吸附速率主要取决于油的表面张力，而吸附速率主要取决于膜/脱落石墨的表面积。实验数据表明，吸油速率在2.5 g/g ~ 40 g/g之间，吸附速率在0.32 g/g/min ~ 0.80 g/g/min之间振荡。此外，T-B系统作为密封屏障和吸附材料进行了测试，结果良好，包括其可回收性。(C) 2014 Elsevier B.V.版权所有
This paper reports the development of superhydrophobic 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. (C) 2014 Elsevier B.V. All rights reserved.