超疏水-超亲油海绵的制备及其在水污染治理中的应用研究

Preparation of Superhydrophobic Superoleophilic Sponge and its Application in Water Pollution Control

为有效处理含油废水,满足环保要求,采用一锅水热法制备超疏水-超亲油PVA海绵材料(STt@PVA),其可瞬时吸收氯仿、正十六烷及汽油等黏度较低的有机溶剂,高黏度食用油的吸附时长约20 s;对正十六烷、汽油及氯仿的分离效率,依次是98%、93%、86%。且经过5次循环后,吸附正十六烷、氯仿-水混合物,分离效率均在83%以上,表明STt@PVA具有很好的油水分离性能和回收性。

In order to effectively treat oily wastewater and meet environmental requirements,a one pot hydrothermal method was used to prepare superhydrophobic superoleophilic PVA sponge material(STt@PVA).It can instantly absorb low viscosity organic solvents such as chloroform,n-hexadecane,and gasoline,and the adsorption time of high viscosity edible oil is about 20 seconds.The separation efficiency of n-hexadecane,gasoline,and chloroform is 98%,93%,and 86%,respectively.After 5 cycles,the adsorption efficiency of n-hexadecane and chloroform water mixture was above 83%,indicating that STt@PVA has excellent oil-water separation performance and recyclability.