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A hydrogel-coated membrane for highly efficient separation of microalgal bio-lipid
신지혜,김호기,문희연,곽무진,Seula Oh,유영민,이은정,장용근,임성갑 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.6
A cross-linked hydrogel-coated membrane was fabricated to achieve simple but highly efficient separation of bio-lipids directly from an aqueous microalgal culture medium. The membrane is composed of a stainless steel membrane coated conformally with a cross-linked hydrogel, poly(2-hydroxyethyl methacrylate) (pHEMA), synthesized by a photo-initiated chemical vapor deposition (piCVD) process. The pHEMA-coated membrane has hydrophilicity and underwater-oleophobicity for efficient separation of a bio-lipid-in-hexane/water mixture by gravity. The conformal pHEMA film-coated membrane enables extremely high oil rejection performance with intrusion pressure of 6.1 kPa and water permeation flux of 6.5×103 L m2 h1, with excellent separation efficiency greater than 98.0%.