A simple,efficient and environmental friendly material and method was used for oil-water separation,using a uniformcoating of PVA/chitosan and SiO2composite on the surface of polyurethane sponge with glutaraldehyde to achieve superhydrophilic/underwater superhydrophobic properties.This new modified sponge can be used for continuous oil-water separation,separating not only soybean oil,pump oil and silicone oil from water,but also acidic and alkaline oily wastewater with superior corrosion resistance.Its surface roughness was characterized by using high power scanning electron microscopy and good thermal stability was characterized by using thermogravimetric analysis.In addition,the best efficiency of modified sponge for oil-water separation was up to about 98.4% when the mass ratio of polymer to SiO2 was 1∶2.So it was a simple and environmental friendly materials.
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基金资助
武汉科技大学青年科技骨干培育计划(2017xz010);湖北省教育厅科学技术研究计划青年人才项目(Q20171108)
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