ABSTRACT
With the characteristics of high porous rates, large specific surface area and high specific strength, porous Cu sponge has been a new object of study in the oil/water separation area. Porous Cu sponge is a three-dimensional and multi-functional material with a large amount of connected or nonconnected holes in the Cu substrate. It presents good machinability and processing properties and has excellent electromagnetic shielding and noise elimination ability. Simultaneously, porous Cu sponge still retains the properties of Cu-like good electrical conductivity, excellent thermal conductivity, ductility and strong base solution in reserve,
1 INTRODUCTION
1.1 Type area
Water and oil are the important resource of our daily life. The qualities of water and oil affect numerous aspects of the human productivity. The waste water in oil seriously affects the quality and service efficiency of the oil. Research on oil/water separation technology has great significance in terms of improving the quality of oil and water. Researchers have showed keen interest in the special performance of the extreme wettability in some materials in the nature (Barthlott W & Neinhuis C 1997). Thanks to the different applications in the special wettability of water and oil, achieving oil/ water separation has been in the center of public concern (Sanhu Liu et al. 2015). Porous materials like fibrous membranes (Viswanadam G 2013), filter paper (Zhang M et al. 2012), metal net (Lec C H et al. 2011, Wang C X et al. 2009) and polymeric
thus having a wide range of application prospects such as electronics, medical, mechanics and national defense (Wen Zhang et al. 2015). In this paper, a simple method that combines chemical oxidation and low surface energy modification was used to construct nano-roughness and achieve the superhydrophobicity. The influence of oxidation time on the surface structure was studied in this paper, and the extreme wettability, water pressure resistance, oil/water separation efficiency of the porous Cu sponge were studied at the same time.
