Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 4, Issue 21, Pages 8080-8090Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta01621a
Keywords
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Funding
- National Natural Science Foundation of China [21276173, 21306123, 21576184]
- Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi
- Foundation of the Taiyuan University of Technology for Outstanding Young Teachers [2014YQ019]
- Shanxi Scholarship Council of China [2015-039]
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A coaxial cable-like stainless steel wire@conducting polymer (polyaniline or polypyrrole) with special hierarchical micro-nanoscale roughness was successfully synthesized using a facile, inexpensive and controlled pulse electro-polymerization method (PPM). Conjugated with stearoyl chloride (SC) through an acylation reaction, the obtained meshes exhibit both superhydrophobic and superoleophilic properties with a water contact angle of 154 degrees and an oil contact angle of 0 degrees, which was successfully applied in separating a series of oil/water mixtures with a separation efficiency of over 98%. The separation efficiency also remains high even after 25 reuse cycles (99.90% for a hexane/water mixture). More importantly, owing to their self-adaption aging protection and antioxidant properties, the obtained meshes retain ultrastable superhydrophobicity and high separation efficiency in long-term storage, ultrasonic treatment, and even under extreme environment conditions of strong acidic, alkaline, hyperhatine and oxidizing solutions. In addition, electrochemical measurements indicate that the corrosion dynamic rate of the superhydrophobic mesh is 1/60 lower than that of bare stainless steel mesh. Therefore, this work provides a novel method to fabricate a high quality superhydrophobic and superoleophilic mesh for effective oil/water separation.
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