Corn stover,as a stable natural material,is idle and not effectively utilized in vast rural areas.In this paper,corn stover was used as a research material,and it showed superhydrophobic/superoleophilic properties by loading nano-Fe3O4 on its surface and introducing dodecyl mercaptan modification.The magnetic superhydrophobic corn stover was characterized by scanning electron microscopy,X-ray diffractometer,and contact angle measurement,respectively.The results showed that the rough structure of the surface was greatly increased,with good loading of nano-Fe3O4,while the contact angle of the surface reached 154° for water and 0° for oil droplets.Using its extreme opposite wettability to water and oil,it could be well applied to the adsorption and separation of oil in water,with an adsorption and separation efficiency of 88%.Meanwhile,the oil adsorption and oil retention test results revealed that the magnetic superhydrophobic corn stover adsorbed more than five times as much oil as itself and had excellent oil retention.In addition,the cycling experiments demonstrated that the oil removal performance and magnetic properties did not change significantly after 10 cycles of tests,and the material stability was good.This study is expected to provide a reference for the resource utilization of corn stover and the preparation of magnetic oil adsorption and removal materials.
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基金资助
兰州工业学院创新训练计划项目(DC202302-167)
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