Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 421, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.126788
Keywords
Polysulfone; Superhydrophobicity; Oil; water separation; ZIF-7; Porous materials
Categories
Funding
- Natural Science Foundation of Zhejiang Province [LQ21B040002]
- National Natural Science Foundation of China [U1809213, 21975222]
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Efficient absorbent material SPZ foam with superhydrophobic/superoleophilic properties and highly selective absorption capacity was successfully fabricated. The foam demonstrated outstanding self-cleaning and separation abilities, with maintained high absorption capacity and oil/water separation efficiency after multiple absorption/distillation cycles. SPZ foam shows promise as a reusable absorbent for practical oil spill cleanup.
Development of efficient absorbent materials for oil spillage clean-up and environmental pollution remediation is highly desired but remains a challenge. In this work, superhydrophobic/superoleophilic polysulfone based ZIF-7 composite (SPZ) foams were fabricated via chemical modification of polysulfone and integrating with hydrophobic coin-shaped ZIF-7 particles. The synergistic approaches provided the SPZ foams with high porosity, low density and superhydrophobic/superoleophilic features (theta water=162.3 degrees, theta oil=0 degrees) and outstanding self-cleaning property. The as-prepared SPZ foams exhibited highly selective absorption capacity (up to 3800 wt%) for various kinds of oils and organic solvents. Furthermore, the SPZ foams still maintained 95.2% of its pristine absorption capacity and the theta water remained at 143.6 degrees after ten absorption/distillation cycles. The SPZ foam showed outstanding separation ability towards different types of emulsions with separation efficiency all above 97%. The high oil/water separation efficiency and robust reusability made the SPZ foams promising absorbent in dealing with practical oil spills.
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