Bottom-up and up-down strategy were adopted simultaneously to fabricate the interconnected porous polystyrene monolith based on the high internal phase emulsions (HIPEs) technique. Interface-initiated polymerization strategy of the HIPEs combined with porogen toluene molecule offered an attractive route to fabricate the ultra-light polystyrene foam. High porosity and extra-light density endowed the polystyrene foam with outstanding oil adsorption performance towards a wide range of oil/organic solvents and diesel adsorption capacity exceeded 75.1 g/g. For recyclability, the oil adsorbed in the monolithic polystyrene foam was recovered just by means of centrifugation and the deoiling rate was over 90%. Even after ten cycles of adsorption-centrifugation, the material showed little decline in the adsorption capacity. Oleophilicity, hydrophobicity, permeable pore structure, ultra-low density, excellent oil adsorption performance and recyclability, all these features help the polystyrene foam find great application in the field of oil–water separation.

同时采用自下而上和自下而上的策略，以基于高内相乳液（HIPEs）技术制造互连的多孔聚苯乙烯整料。HIPEs的界面引发聚合策略与成孔剂甲苯分子的结合为制造超轻聚苯乙烯泡沫塑料提供了诱人的途径。高孔隙率和超轻密度使聚苯乙烯泡沫塑料对各种油/有机溶剂具有出色的吸油性能，柴油的吸附量超过75.1 g / g。为了可回收利用，仅通过离心回收吸附在整体式聚苯乙烯泡沫中的油，并且脱油率超过90％。即使经过十个吸附-离心循环，该材料的吸附能力也几乎没有下降。亲油性，疏水性，