Rapid deposition of superhydrophilic stalagmite-like protrusions for underwater selective superwettability

Yang, Ching‐Wen; Lo, Yu-Hsiang; Liu, Chang; Cheng, Hsin‐Ming; Duh, Jenq‐Gong; Chen, Po‐Yu

doi:10.1039/c6ra20073g

Cited by 1 publication

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“…Noticing that the serious issue of worldwide oil spill nowadays, more and more researchers seek alternative or improved methods to purify oily-contaminated water. Various substrates including commercially available meshes 1 – 4 , filter papers 5 , membranes 6 – 8 , and foams 9 – 11 possess different affinities to oil/water systems mainly by superhydrophilic/oelophobic 3 , 12 and superhydrophilic/underwater superoleophobic surfaces 6 , 13 , 14 that show great potential to extend the application in oil/water separation. Underwater superoleophobic materials have been extensively studied by several groups recently 15 – 18 .…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation

Yang

Chang

et al. 2017

Sci Rep

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Membranes with selective superwettability for oil/water separation have received significant attention during the past decades. Hierarchical structures and surface roughness are believed to improve the oil repellency and the stability of Cassie-Baxter state. Diatoms, unicellular photosynthetic algae, possess sophisticated skeletal shells (called frustules) which are made of hydrated silica. Motivated by the hierarchical micro- and nanoscale features of diatom, we fabricate a hierarchical diatomite membrane which consists of aligned micro-sized channels by the freeze casting process. The fine nano-porous structures of frustules are well preserved after the post sintering process. The bioinspired diatomite membrane performs both underwater superoleophobicity and superhydrophobicity under various oils. Additionally, we demonstrate the highly efficient oil/water separation capabililty of the membranes in various harsh environments. The water flux can be further adjusted by tuning the cooling rates. The eco-friendly and robust bioinspired membranes produced by the simple, cost-effective freeze casting method can be potentially applied for large scale and efficient oil/water separation.

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Section: Introductionmentioning

confidence: 99%

Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation

Yang

Chang

et al. 2017

Sci Rep

Self Cite

View full text Add to dashboard Cite

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Rapid deposition of superhydrophilic stalagmite-like protrusions for underwater selective superwettability

Abstract: Hierarchically stalagmite-like tungsten-oxide protrusions on stainless steel mesh exhibited superior selective superwettability toward low surface tension oils under harsh environments.

Cited by 1 publication

References 31 publications

Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation

Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation

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