Performance and Mechanism of a Novel in Situ Oil/Water Micro-separation/Classifier
Oil spill is one of the main pollution sources on the sea.Natural kapok fibers have special hydrophobic and oleophilic wetting property and are wildly available.In this paper,we primarily investigated the interrelationship between its special wetting property and its surface chemical component and morphology,then employed its special wetting behavior for a novel in situ oil/water micro-separation/classifier.We presume that the combined effect of the micro-nano-binary structure of kapok fiber constructed by the nano-scaled microstructure and the micro-scaled fiber diameter,with the hydrophobic paraffinic wax on natural kapok fiber surface,contribute to its special wetting property.Take advantage of the liquid-oriented effect along the fiber length resulted from the micrometer fiber diameter and orientation of the nanometer structure,we designed a novel in situ oil/water micro-separation/classifier.The water droplets slide easily along the fiber length direction,however,the oil was fleetly absorbed by the kapok fiber.As the device is vertical,the geopotential will induce the water and oil export to water-exit and oil-exit,respectively.The separating efficiency is higher than 90％ for all water/oil blending ratio.And the critical speed for separation is also obtained.This novel in situ oil/water micro-separation/classifier can work rapidly and continuously without saturation,and dispense with extra energy besides gravity.Moreover,the use of natural kapok fiber is not only low-costing,but also self-degradable that won’t cause secondary pollution.The whole flux can be enlarged by parallel connecting hundreds of thousands such devices together.All of these advantages promise the potential application of this device for oil spill cleanup on the sea.
Fiber Kapok Wetting property Water/oil separation Super hydrophobicity
Xiaoyan Zhang Ning Zhao Hong Xiao Meiwu Shi Jian Xu
State Key Laboratory of Polymer Physics and Chemistry,Institute of Chemistry,Chinese Academy ofScien The Quartermaster Research Institute of the General Logistics Department of the PLA,Beijing 100082,C
国际会议
杭州
英文
2008-10-15（万方平台首次上网日期，不代表论文的发表时间）