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Facile Fabrication of Superhydrophobic and Superoleophilic Bulk Materials with Excellent Durability

Bei Ding, Danfeng Zhi, Henzheng Chen and Xia Zhang

Development of superhydrophobic material is hindered by their susceptibility to mechanical abrasion and oil fouling. Here, to address these issues, we prepared robust superhydrophobic and superoleophilic SiO2/polytetrafluoroethylene bulk material with good adaptability and easy repairability. Removing the outer layer damaged by abrasion or fouled by oil causes almost no loss of its superhydrophobicity. More importantly, this bulk material demonstrates sustainable superhydrophobicity under the condition of strong acid or alkali. In addition, the obtained bulk material is both superhydrophobic and superoleophilic, which means it can be used to selectively absorb oil from oil-water mixture. This bulk material with easy repairability is expected to satisfy the future demands in the practical applications.