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Inorganic–Organic Thiol–ene Coated Mesh for Oil/Water Separation
journal contribution
posted on 2015-08-26, 00:00 authored by Qiyi Chen, Al de Leon, Rigoberto C. AdvinculaA highly
efficient mesh for oil/water separation was fabricated
by using a superhydrophobic and superoleophilic coating of thiol–ene
hybrid, consisting of pentaerythritol tetra(3-mercaptopropionate)
(PETMP), 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane
(TMTVSi), and hydrophobic fumed silica nanoparticles, via a simple
two-step fabrication process. Spray deposition and UV curing photopolymerization
were sequentially performed, during which solvent evaporation provides
microscale roughness while nanoparticle aggregation forms nanoscale
roughness. The hierarchical morphologies were stabilized after UV
curing photopolymerization. High contact angle (>150°) and
low
roll-off angle (<5°) were achieved due to the multiscale roughness
structure of the hierarchical morphologies. These coatings also have
excellent chemical resistance, as well as temperature and pH stability,
after curing.