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김동권,이수복,하종욱,김정훈,박인준 한국공업화학회 2003 응용화학 Vol.7 No.2
Perflurorourethane copolymers were stnthesized by free-radical copolymerization using a fluorine-containing monomer and urethane monomers as starting materials. The fluorine-containing monomer used was perfluoroalkyl alcohol(FOH), and the urethane monomers used were tolylene 2,4-diisocyanate(TDI), hexamethylene diisocyanate(HDI), and 4,4-methylene bis(phenyl isocyanate)(MDI). The surface properties and surface modification ability of the perfluorourethane copolymers prepared were investigated. The surface free energies of polyethylene(PE) films modified by the perfluorourethane copolymers and their surface modifkcation properties were also investigated.
범정철,정대환,하종욱,박인준,이수복 한국공업화학회 2002 응용화학 Vol.6 No.1
The super water-repellent composite membrane were obtained using "grafting-from" polymerization with azo initiator chemically bonded on porous silica surface and radical-chain polymerization of fluorinated monomer. The synthesis of the fluorinated polymer brushes, membrane characterization were measured by XPS(X-ray Photoelectron Spectroscopy), SEM(Scanning Electron Microscopy), contact angle measurement, and permeation test. A liquid droplet on the ultra-hydrophobic surface has a contact angle as large as 160˚ with apparent surface free energy of ca. 0.1 dyn/cm. The first application of the surface to 4th generation composite membrane is also described. Permeability measurement was performing simple time-mass measurements using water and MeOH. The permeability of the membrane was changed remarkably by the surface modification with PFA brushes.