JMS-Construction of oil-unidirectional membrane for integrated oil collection with lossless transportation and oil-in-water emulsion purification
作者：Xiaobin Yang, ?a Zhenxing Wang, ?a,b and Lu Shao*a
關鍵字：Janus membrane
論文來源：期刊
具體來源：Journal of membrane science
發表時間：2017年
Oily wastewater and oil spills not only cause large amounts of resource wastefulness, but
threaten water safety and human health. Besides, for some oily emulsions, the oil droplets
are usually valuable, such as the soybean oil droplets formed during oil manufacture, and
the oil droplets carrying high valued product from the extraction process or microemulsion reactor. Therefore, the collection and recovery of oil from water are particularly important. However, the recovery of oil droplets form emulsions and collection-lossless
transportation of oil spills are still a big challenge, which cannot be solved by current
oil/water separation methods, including the super-wetting strategy. Herein, we designed
and prepared oil-unidirectional Janus membrane via unilateral decoration of commercial
hydrophobic composite microfiltration membranes. The obtained Janus membrane is
composed of a thin hydrophilic layer and thick hydrophobic supporting layer, and the
asymmetric surface wettability can realize the unidirectional oil-transport property, viz.
oil “diode”. Therefore, the obtained JMs with oil unidirectional transport property can
realize the efficient collection and recovery of various oils. For example, the J M can
effectively draw the micrometer-sized oil droplets from various oil-in-water emulsions,
and realize the collection-lossless transportation of the oil spills. Our strategy can firmly
stimulate and accelerate the advances of functional membranes toward the broad
intelligent and sustainable usages.